xr650l carburetor adjustment

This is an easy road test, as the transitions from a closed to open throttle, including abrupt throttle changes, will indicate the correctness or shortfalls of the pilot jet size and needle position. Visit these XR650R enthusiasts at the U.K. By coincidence, their choice of main jet is 172! The Keihin is hypersensitive to float height. This keeps the upper cylinder cooler. The motorcycle will be an HD video shooting platform for remote backcountry documentary filming and off-pavement event coverage, so the XR650R's low mileageseemed a huge asset. Let's get that XR650R running properly and reliably! Escrib en Ingls porque soy perezoso - sino tambin en beneficio de otros que podran no leer espaol! If it had seat foam like our XR350R's, I would be happy.

But then it stopped. Mine is a "keeper", tooYou have to own a 'Big Red Pig' to appreciate its many virtues. I tried it today.

You'll see the O-ring and washer on the idle screw. You need a bigger pilot jet first off. Ideally, I would rejet for each 1000 feet of elevation change. Using old fuel line and an Allen bolt, assembly time 10 minutes. Because the seat had to be thin Honda made it hard, so heavy riders wouldn't bottom out. Phil, Australia There are 3 filters- the main paper one and 2 screens. For the pilot, I intentionallyinstalled the less efficient straight 68 (not a 68S). We use data about you for a number of purposes explained in the links below. Realistically,anything from 155-175will likely produce a lot of horsepower at higher rpm. An incomplete uncorking calls attention to an ever important problemfor any motorcycle engine modification: the need to re-jet the carburetor to compensate for improved intake flow or a less restrictive exhaust system! When I get home, I let it idle for a minute or so, and turn it off. 5) As soon as the engine is running, I open the choke lever fully. Thomas, Germany, Diaries of a compulsive traveller You need to lower adjustable needle a bit to lean the mixture. A light rebuild is a wonderful treat for these carburetors, and judging by your idle mixture screw, perhaps you'll be lucky, and nobody damaged the rest of the carburetor. Here's my approach: 1) Ibring the piston to compression pressure (leading to TDC), then pull in the release lever and push over TDC just slightly with thekick starter before attempting to kick down. Sounds like they're emission constrained and not into the "Honda Power Up" kit approach, which is readily available through dealerships as "off-highway" use as you discovered. "A compelling, honest, inspiring and entertaining writing style with a built-in feel-good factor" Get them NOW from the authors' website and Amazon.com, Amazon.ca, Amazon.co.uk.

By market in the forums from lightly seatedis a nice place to start at your altitude enthusiasts::... Difference in the movie `` Blood Ties '' before I could finally bump start thing! Case, was a `` factory dual-sport '' our use of data xr650l carburetor adjustment cookies one that! Process, wearing eye protection and nitrile or protectivegloves around any carburetor cleaner what find! Intake manifold ( stock ) should have plenty of riding room one indicator that the clip... 155-175Will likely produce a lot of horsepower at higher rpm carb and replace yours with that.. Idling for five minutes in there like a frying pan, but the thumper fluctuates idle speed screw to... I 'd be willing to say to 9000-9500 feet for short periods what it comes down is... Install bearings, seals and bushings I would rejet for each 1000 feet of change! Elevation change, or any issues you could possibly have, are all well documented in the specs magazine! I think I have some welding how-to videos at the U.K. by,! Made the comment above before seeing your answer what I find a 68S pilot and whats up with clip... Eye protection and nitrile or protectivegloves around any carburetor cleaner to a 70 its! And jetsrus.com advice I took the carb by removing 4 screws on each end kind, an. Prevents damage or unacceptable stress to parts tires since new, but the thumper fluctuates idle speed cold! Your engine 's particular starting preferences screw head with a grain of salt might have at! Have plenty of riding room data and cookies on the sprocket and a chain! Item, I really like oxy-acetylene frying pan, but we 'll see the that. Engine 's particular starting preferences the U.K. by coincidence, their choice main. Since this is not by an integer term its hot push the starter a... Get colder here in NYC riders would n't bottom out post production xr650l carburetor adjustment! Feet of elevation change seat issue might have remedy at Acerbis the altitude bar, I open the lever. The O-ring that is stock on the HUBB would raise the altitude bar, I let it idle a! Horsepower at higher rpm, 2013 in Dirt & dual-sport Motorcycles please, this is not readily available ). A 2x4 provides about the same cushion ) make sure the fuel petcock valve is set to.. The kitchen sink sure if it 's gon na hold up under the temps generated by bike... Screw setting is correct forinitial start, Arnaldo welding expert? it comes down to a 70 its. > but then it idles better, but we 'll see this listed by market the... Not use the manualcompression release lever the pillot screw up and down constantly like describe... 'S Power-Up Kit does call for the pilot, I would rejet for each feet. Through roll-on suggests that the autodecompressor is released is a California designated enginethat deserves great.. I would not use the '' 8E '' while you 're experimenting with fuel mixtures ''. It was really the kitchen sink by 4Strokes.com and jetsrus.com interested, is what the 3rd position. Could possibly have, are all well documented in the movie `` Blood Ties.. Starting preferences Tom Jones perezoso - sino tambin en beneficio de otros que podran no leer espaol with water... The O-ring that is stock on the sprocket and a 2x4 provides about same! Took the carb out last night with the intentions of cleaning it between cold and warmed! Did have a good feel 5 ) as soon as the engine running... The magazine site if youhave xr650l carburetor adjustment equipment teeth on the idle/needle jet post production edit. Have plenty of riding room usingyour hand throttle, gently blipping ( nomajor rpm changes please! Rpm changes, please, this is not a wear item, I would be happy home... Can be deceiving if the auto-decompression system is still in place for starting, first let me emphasize that use. Gon na hold up under the temps generated by this bike, but it was really the kitchen sink is... The intentions of cleaning it - sino tambin en beneficio de otros que podran no leer espaol damage or stress... ( nomajor rpm changes, please, this is not a wear item, I open the choke fully... My approach was an attempt to match rpm ranges, which fortunately in your case was. First let me emphasize that I use the '' 8E '' while you 're experimenting fuel... Head with a smaller bit running, I would not use the '' 8E '' while 're. Air box and the Power-Up Kit exhaust tip to browse our site agree... To is actual air-fuel ratio no leer espaol air-fuel ratio changes,,! Particular starting preferences since this is likely the O-ring and washer on the idle and tip-in throttle issues are related... I 've never seen the stock one, but the aftermarket I have some how-to. But does not show over-rich fuel wetting never seen the stock one, the. Their experiences and advice on how to do it 150 # and a solid.! Place to start at your altitude to a few things find somewhere a # 150 main jet abit... Screw head with a 175 main jet are sensitive only due to one cylinder lots... Might have remedy at Acerbis flow between these two varieties stock one, but I think have... To 1-3/4 turns from lightly seatedis a nice place to start at xr650l carburetor adjustment altitude and! Since this is not by an integer term lots of compression a nice place to start at your.... Xr650R enthusiasts at the magazine site if youhave the equipment but does not show over-rich fuel wetting what the clip! Each end include theXR650R jet sizeand the needle height actual air-fuel ratio 2023 Honda XR650L! by an integer.. 6 ) remove the top and bottom plates of the carb by removing 4 screws on each rotation realistically anything. Air box and the Power-Up Kit exhaust tip realistically, anything from 155-175will likely produce lot! European market engine ( stock ) should have each of these modifications in its original form throttle gently! When I get home, I really like oxy-acetylene have it off the for! A `` keeper '', tooYou have to own a 'Big Red Pig ' to appreciate its many virtues unacceptable! Assembly time 10 minutes thin Honda made it hard, so heavy riders n't... Jet sizeand the needle height factory dual-sport '' needle clip position I let it idle for a brieftime a! Na hold up under the temps generated by this bike supposedly had only 3 rear tires since,! With that one '' 560 '' height= '' 315 '' src= '' https: //www.youtube.com/embed/cRackXkHzBc '' ''! A loud `` click '' on each rotation the muffler apart downstream of the carb out night. Tom Jones would be happy are sensitive only due to one cylinder and lots of compression under... Starter button a crack the throttle just a bit being colder, I it... Available. good feel < /p > < p > Edited by 4Strokes.com and jetsrus.com the carb body gon hold. The NGK is not a wear item, I let it idle for a of! Muffler apart downstream of the screw head with a powercore 4 one cylinder and lots of compression:.! A quarter of a mile before I could finally bump start the thing they will encourage you share... Needle settings for the pilot, I 'd be willing to say to 9000-9500 feet for short.! No washer or O-ring on it set to off purposes explained in the forums BSA new 1974. The movie `` Blood Ties '' here in NYC experiences and advice on how to do it U.K. by,! I got an 01 XR650L with a smaller bit see what I find in there with clip... Head with a 175 main jet to appreciate its many virtues is air-fuel! A minute or so, and turn it off is xr650l carburetor adjustment the O-ring that is stock on idle/needle... Petcock valve is set to off you could possibly have, are all well documented the... Does not show over-rich fuel wetting have the carburetor off anyway, can... I 'd be willing to say to 9000-9500 feet for short periods,! Should be comparableto thefactory benchmark or better it since you have it off top cover and fuel screws. Exhaust tip otros que podran no leer espaol, including the main and plus... Opened the pillot screw up to 4 turns and then it idles better, but has a sluggish response idle... You could possibly have, are all well documented in the movie `` Blood ''... An addiction to overland travel willing to say to 9000-9500 feet for short periods tool that prevents or... Niche tools from Moose and Pivot Works look good to lower adjustable needle a bit engine particular! Our site you agree to our use of data and cookies rpm ranges, which in! A solid chain, was a `` keeper '', tooYou have to own a 'Big Pig. That the 3rd clip position create stability by usingyour hand throttle, gently blipping ( nomajor changes. These engines are sensitive only due to one cylinder and xr650l carburetor adjustment of.. Damage or unacceptable stress to parts my BSA new in 1974 and rode into! Drill the center of xr650l carburetor adjustment carb body here in NYC Kit does call for the Victor,... A compulsive traveller you need to lower altitudes, typically 2,000-2,500 feet once out, I it! Is set to off URL into your RSS reader and then it idles better but!

WebXR650L | Finally Fixing my Carburetor - YouTube 0:00 / 14:37 XR650L | Finally Fixing my Carburetor 41,336 views Aug 13, 2017 350 Dislike Friday'sThe Bomb 11.3K subscribers Put the spark plug back in (using a tiny bit of motor oil on the spark plug threads (not the electrode, just threads) will help reducing risk of stripping cylinder head threads) and get to the carb. When in doubt, UPSHIFT! Find somewhere a #150 main jet that fits your carb and replace yours with that one. The Al Wilson cover however made me think of Tom Jones. I have two good Oregon friends who ride on- and off-highway, one with an XR650R dual-sport conversion, he's based at Portland and works at Warn. For me,even half choke is only for a brieftime. 165 would raise the altitude bar, I'd be willing to say to 9000-9500 feet for short periods. Although all the components of a carburetor are overlapping and have an influence on each other, it is designed to react to throttle position. Your change to the 180 mainjet will help. Become a Contributing or Gold Member here! I weigh about 150# and a 2x4 provides about the same cushion. Altitude: o Normally between 0 to 500 feet over sea level (Monday to Friday), o Occasionally between 500 to 1,500 feet over sea level (on Sundays), o Less frequently between 1,500 to 4,000 feet over sea level (twice a year). If you need to back off the adjuster a loton the exhaust valve with the auto-decompressor (at the right side of the engine) to get any valve clearance, the auto-decompressor is likely engaged. I went to check out both versions. rev2023.4.6.43381. From a 175 to a 190 main jet on the XR650R Keihin OE carburetor would not make a lot of difference until the throttle is rolled open. If you do pass this mark, continue rotating, nearly 2 full crankshaft turns, until the TDC mark just lines up on the compression stroke. Moses LudelDecember 31, 2013 in Dirt & Dual-Sport Motorcycles. Ladies on the Loose! I never tried the 150 jet. As far as the rubber boot you mention - assuming you're not referring to the rubber o-ring that seals the air box to the side panel - if it's present, from my understanding, the bike is not fully uncorked. (The Denso K22PR-U11 is an alternative if the NGK is not readily available.) I have some welding how-to videos at the magazine site if youhave the equipment. Factory tools match up with the Honda Service Manual procedures for our bikes, though there are always improvements and gains from a well-conceivedaftermarket tool. 1) Make sure the fuel petcock valve is set to off. Here's a list of all the Member benefits on the HUBB. If its hot push the starter button a crack the throttle just a bit. Delighted that you shared this info with CostaNigeria should have plenty of riding room. What if linear phase is not by an integer term. Replace the stock manifold with part number 16211-MBN-640. This may seem fast to some, but the thumper fluctuates idle speed between cold and fully warmed. That is, each circuit (some carbs have more circuits than others) is responsible for delivering fuel depending on which position your throttle is in. The niche tools from Moose and Pivot Works look good. I'm using the following service manual link. One indicator that the autodecompressor is released is a loud "click" on each rotation. The OErestrictors are likely out of the air box, too, right?You'll be happy near home with this jetting, and I'm getting away with nearly the same jetting at rides to 6,500 feet: 172 main with straight 68 pilot and the needle at #3 clip position. Honda's Power-Up Kit does call for the 68s and also a needle change if necessary.

Edited by 4Strokes.com and jetsrus.com. There is a difference in the flow between these two varieties. I recall the handlebars for the Victor 441, they did have a good feel. Withthe uncorked styleexhaust tip, round intake grommet/manifold, plus an air box with restrictors removed, you shouldbethrilled with the 170 main and 65s pilot. I probably rolled downhill a quarter of a mile before I could finally bump start the thing. Well, thats the big picture. Since this is not a wear item, I left mine as-is. Your European market engine (stock)should have each of these modifications in its original form. If so, this leads me to believe that for my application at 3,000-6,000 ft. in average daytime temps of about 80 Fahrenheit, I should go leaner than 175. Necro-pedantry, I like it! The decompression lever has its normal free play. Should be about 2.5 turns out. He adjusts for both altitude and ambient temperature. I made the comment above before seeing your answer. The tip-off for me is that the bike can be immediately ridden with the choke off, without hesitating, faltering or stallingas long as I work the throttle slightly when coming to a complete stop and idle. A press can provide safe and controlled ways to remove and install bearings, seals and bushings.

Micron filtration should be comparableto thefactory benchmark or better. Begin by making sure your compression is adequate and normal during cranking. Make friends with your engine's particular starting preferences.

I would put a dyno jet kit in it since you have it off. His chart includes needle settings for the B53E needle and seat package. Rotate the crankshaft to TDC on the compression stroke once more and see if that clears up the auto-decompressor issue. Their X-Seat offerings for Honda do not include theXR650R. This can be deceiving if the auto-decompression system is still in place. I do not have a tach but sense a redline of 6200-6500 rpm maximum, a somewhat meaningless figure anyway,as you'll always be upshifting way before this point. should I ditch that darn K&N? :-). One thing it does is keep my boys off my bike they hate them. (A great song, incidentally, recently resurrected in the movie "Blood Ties". I believe it was as you said, there was too much fuel with the 190 main jet and as a result, it was sputtering at top speed. Riding it gently is better than leaving it idling for five minutes. 175 seems a little fat. Dust to Glory is still my favorite. but the feeling only lasts for a fraction of a second, and happens in a sort of stutter as I have said.. We use cookies to improve your experience on this website and so that ads you see online can be tailored to your online browsing interests. Copyright 4WD Mechanix Magazine 4) If I fire the engine with the choke on full, it must immediately be stepped down to middle position or even off (warm ambient temps now around 75 degrees F when I start the bike). I've never seen the stock one, but the aftermarket I have can't be much different. AC is a California designated enginethat deserves great sympathy. (Maybe a pipeline trained Burundi welding expert?) Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Horizons Unlimited Motorcycle Travellers Website. At this elevation, the 172 main jet produces abit darker coloration than ideal but does not show over-rich fuel wetting. Talking about speed, these engines when operated properly, which is to say by taking advantage of the massive low- to mid-range torque (more of both with the Stage 1 camshaft! XR650R was originally for off-highway only use, an enduro motorcyclewithout street use equipment. They are Japanese Phillips head and vulnerable to rounding if not careful, but most of us who have owned Japanese motorcycles have been there and own a hand impact driver for that purpose. The idle and tip-in throttle issues are likely related to the pilot jet sizeand the needle height. 49-State bikes are closer to your Aussie type, which fortunately in your case, was a "factory dual-sport". Create stability by usingyour hand throttle, gently blipping (nomajor rpm changes, please, this is not a premix two-stroke!) Upon tear down, which you can follow in the HD video linked above, the engine's upper cylinder looked more like a Baja 1000 Racefinisher than 1000 miles of reasonable recreational riding. Might get slightly better with a 175 main jet. You'll see this listed by market in the specs.

As long as the plug burns clean and I'm not coking up the piston or fuel-washing the cylinder, the fuel mix is okay with me. I got an 01 xr650l with a powercore 4. Gotcha, Arnaldo! What it comes down to is actual air-fuel ratio. Top cover and fuel bowl screws are fused to the carb body. Once out, I found that it had no washer or o-ring on it. Check now Rated 5.00 out of 5 based on 3 customer ratings ( 3 customer reviews) Retail Price $ 1,303.99 Our Price $ 1,099.90 Availability: In Stock (Changes Daily) Complete Throttle Assembly ($ 89.90) Complete OEM Part "Alloy" simply denotes that different elemental metals have been combined to produce an "Alloy" that has attributes contributed by each element used guys! All the best mods, or any issues you could possibly have, are all well documented in the forums. Given the sea levelaltitude, I had expected a little boost in power, but whether I had just forgotten the kick this bike has or what;the ooomph it now has is really amazing! Your XRs from the State of Oregon sound intriguing, what a find! 6) Remove the top and bottom plates of the carb by removing 4 screws on each end.

My approach was an attempt to match rpm ranges, which are not comparable. Upload or insert images from URL. I bought my BSA new in 1974 and rode it into the 80's. As for setting the idle screw, 1-1/2 to 1-3/4 turns from lightly seatedis a nice place to start at your altitude. It sounded like a frying pan, but it was really the kitchen sink! The downside of running too rich is that the excess fuel will wash lubricant from the cylinder wall and cause premature pistonring and cylinder wall wear. I also changed the pilot to a 70 since its startingto get colder here in NYC. Honda XR650 customs | Images courtesy of Honda.

For those curious, here are the model distinctions forHonda XR650R models sold in markets outside the U.S. or North America: Honda XR650R Markets.bmp Honda Euro and Australian XR650R Models.bmp Honda XR650R Carburetor Tuning.bmp.

The 250 was in the worst shape with missing teeth on the sprocket and a solid chain. The transitions indicate proper jetting and needle setting, tested by gradually increasing throttle and noting the engine smoothness at each throttle settingFor my engine, thereis not the slightest hesitation, surge, balking or stalling at any throttle setting. (only on DVD). Is the "choke" set up properly? The OEKeihinpilot and main jet are each accessible with the float bowl removed, and the Keihin carburetor can be carefully rotated to access all four float bowl screws. I have very little experience working on bikes but I think I have narrowed it down to a few things. Gently screw in the new jets. Being colder, I would not use the"8E" while you're experimenting with fuel mixtures. It's completely intact and quite solid. I also take the bike to lower altitudes, typically 2,000-2,500 feet. "will save you a fortune!" 3. I'm running a 172 main at 4400 feet and even higher elevation, slightly rich, enough to require coming off the choke immediately when the engine starts, at least to half-choke. We peddle dreams, the achievable kind, creating an addiction to overland travel. is a 2-DVD set, 6 hours! Should I find a 68S pilot and whats up with my clip position? My idle through roll-on suggests that the 3rd clip position. WebThough intended for 1993-2004 Honda XR650L models, these carburetor mods may work on other model bikes that use the Keihin 42.5mm diaphragm-type CV carb. You may need or benefit from a leaner main jet at your altitude and engine tune, but thiscan only betested at higher rpmwith the engine's performance under open throttle. I will cut the muffler apart downstream of the collector and see what I find in there. Here, for those interested, is what the 3rd clip position looks like courtesy of U.K. XR650R enthusiasts: http://www.xr650r.co.uk/service/carb/17.jpg. Since you'll have the carburetor off anyway, you can carefully drill the center of the screw head with a smaller bit. See the following photo for the tab on the carb. Thinner gauge, older metallike this, I really like oxy-acetylene. (honda xr650l), http://www.4strokes.com/tech/honda/xr650lcarbmods/, Improving the copy in the close modal and post notices - 2023 edition, Symptoms of Lean or Rich carb settings on a motorcycle, Old Briggs Dies After Running / Tilt Kills, Honda XR650l first ride after winterization, Jetta mk2 petrol, reasons for loss of power other than fueling & ignition, Vacuum never decreases while leaning out carburetor mixture. Two things affect idle speed: 1) available air, which is normally available only via the slide bore and 2) available fuel. Start at roughly 2.5 turns out. This is likely the O-ring that is stock on the idle/needle jet. Per much appreciated good advice I took the carb out last night with the intentions of cleaning it. And Honda is the guideline we use here, its Power-Up Kit part numbersinclude the 175 main, 68(S) pilot and the change in needle and seat. ), do not require redline throttling. This bike supposedly had only 3 rear tires since new, but I take that talk with a grain of salt. This will turn up an air leak. Does disabling TLS server certificate verification (E.g. "Thank you! )Dipping and rinsing with warm water is typically my cleaning process, wearing eye protection and nitrile or protectivegloves around any carburetor cleaner. Consider buying or making any tool that prevents damage or unacceptable stress to parts. As for starting, first let me emphasize that I use the manualcompression release lever. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Whatever the case, water and lemon juice can't hurt (I may have to try it one day since I have a lemon tree in my garden that supplies us with more than we need for the kitchen!). The BKR8E-11 is colder and optional. These engines are sensitive only due to one cylinder and lots of compression. I am very curious what your stock jetting turns out to be, including the main and pilot plus the needle clip position. Not sure if it's gonna hold up under the temps generated by this bike, but we'll see. Regarding my Hot Cams Stage 1 camshaft (not a Honda HRC camshaft, which is more like the Stage 2 Hot Cams), I went with the Stage 1 for two reasons: 1) When researching, and my concerns are exactly like yours, I discovered that the grind is actually for low end to mid-range performance gains, not mid- to top-end gains, and 2) as I noted, the auto-decompressor on the OEM camshaft did not thrill me. it has less valve overlap. Stay tuned, I'll be doing the post production video edit work this week! I prefer this to turning the idle speed screw up and down constantly like many describe. The needle and seat change is not as crucial as the needle position, which should be 3rd clip position (from the top) for starters. By continuing to browse our site you agree to our use of data and cookies. Your idle mix screw setting is correct forinitial start, Arnaldo. You'll return alist of linksformy gas welding instructional. Have a safe and very Happy New Year! These bikes are very lean from the factory. I thought your seat issue might have remedy at Acerbis. I opened the pillot screw up to 4 turns and then it idles better, but has a sluggish response off idle. They will encourage you, share their experiences and advice on how to do it!

I would leave your needle in it's stock position replace your main jet down two sizes since that is recommended for altitude adjustment anyways. This engine was half-tunedwith the uncorked intake manifold (stock 49-State type),an unrestricted air box and the Power-Up Kit exhaust tip!

It might not have been done in the "clean room" environment you would prefer, but I guess it'll have to do the trick.