This entry was posted by Evan Fell on March 10, 2010 at 5:35 am, and is filed under XR650R Carburetors. Follow any responses to this post through RSS 2.0.
You can leave a response or trackback from your own site.
Where is 16mm float level measured?
when I get the bike started. it is super hard to start after multi kicks. 5 or so min. then have to keep it idol by throthal. Once you get going you have to keep on the throtal. and it cuts in and out. How do we set back to origainal. had someone work on it and it got worse.
We have no manual. Can you please help me with carb specs. When I got it she ran good. gas may have gotten old. But I did clean carb.
Forget it. The bike needs an accelerator pump to run right.
Evan Reply:January 30th, 2011 at 2:18 pm
That is simply not true. You can squeeze a little more power out with an accelerator pump, but the stock carb (and many others) can be setup very nicely.
Well i would like to know the settings for very nice riding because i have the same problem with my bike
Evan Reply:March 24th, 2011 at 3:32 pm
Settings will vary from bike to bike depending on how you setup. They will also vary depending on altitude, humidity, and riding style. Stock settings are for a stock bike with airbox snorkel, around 1,000 feet of elevation, and a temperate climate.
chris Reply:April 3rd, 2011 at 6:24 pm
well live in Barbados and in it is mostly hot to very hot day and breezy at night and we are below sea level and i ride aggressively and as i ride when i start to slow down the bike sounds like it is running out of gas and then cuts out but then you can start it right back up and ride but as soon as you slow again you will have the same problem, what do you think i should do?
Great site Evan. Well Done.
My bike is a 2004 model with standard carby. I have tried everything to get it to idle properly. New Jets, 68s pilot 165 main, new o rings, new main needle, new idle pin. Pulled it to bits and cleaned about 5 times. Checked for air leaks with water spray.
Need to turn idle up to start and down when warm. Idle just keeps going up and down by itself and is not consistent. Wont idle smoothly.
Any suggestions would be appreciated.
Evan Reply:April 5th, 2011 at 2:08 am
Idle will vary based on operating temperature. I always adjust my idle knob constantly when riding. I turn it up quite a bit before I start the bike so it’ll fire up in 1 kick and idle smoothly, then I’ll turn it down slowly as needed as the bike warms up. I do the same thing on all my XRs and other 4 stroke singles. I also do it on my carbed street bikes to a lesser extent. The hotter a motor is running the less friction there is internally, so the less gas is required to keep it running. Don’t sweat it. The only real solution is fuel injection.
If your idle is spitting and sputtering than you may also need a valve adjustment.
David Reply:April 5th, 2011 at 10:52 pm
jamie Reply:November 7th, 2011 at 8:02 pm
you might check the top carburetor cover o-ring for air leaks. when the idle starts hunting around, i.e. up and down and not consistent, an air leak can sometimes be the culprit. i used hylomar – “fuel safe sealant” to re-seal the o-ring on the top of the carb and the up and down idling issue quit. maybe also check to see that the carburetor is properly seated in both the manifolds, another place for air leaks.
stephen schiller Reply:October 30th, 2012 at 12:08 am
I would check all hoses have been replaced as they came off, also I set my Idle at a low idle when cold and leave it, when it warms up its a little high but that stops the flat spot (stalling just off idle)
Im in adelaide south australia (sea level) uncorked and 175 main jet, exhaust has power tip, recomended mod, other than standard 2006 xr650r,
The problem was a blockage in the pilot circut which I blasted out with ari pressure. At the same time I went to a size 70# pilot jet and the bike idles perfectly now.
Your email address will not be published. Required fields are marked *