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Old 01-16-2014, 05:42 PM   #1
RCTID's Avatar
Joined: Oct 2012
Location: Beaverton, or
Oddometer: 77
Wicked XR650R carburetor problem

So I just picked up an unmolested low hour 2000 XR650R(plated!) in ridiculously nice condition. Super excited about this bike and what all i'm gonna do to it.

However, despite all of the bikes general awesomeness, the carb is having a fuel retention issue. What I mean is...It spills fuel out pretty much all the time, except for when its not running.

When I'm kicking it over(and having no luck), it seems to start spilling a steady stream of fuel out of one of the hoses even though the engine isn't flooded, and eventually stops if I quit kickin'.

Once I get the bike started, it just seems to flow steadily to no end!
It doesn't matter where the rpm is at, idle or part throttle, it just keeps flowing until a few seconds after I turn the engine off.

The guy who had it before me had it for a very short time and bought it at an estate sale from a deceased guy(didn't die on the bike). So he told me he disassembled and cleaned the carb because it had been sitting for so long without use.

Now i'm no carburetor guru...Heck, who am I kidding, I am severely lacking in carburetor knowledge and have no real idea what could cause this. Anybody? Anybody? Bueller?
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Old 01-16-2014, 05:46 PM   #2
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Joined: Jul 2007
Location: San Francisco,Ca.
Oddometer: 12,854
The float needle and seat have some crud in them thus not shutting the fuel flow off and the float bowl is overflowing. Pull the carb and take the float off. Clean the needle and seat. Look at a Honda carb parts fich and you'll see what needs cleaning.
Steve in SF

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87 Harley FXRS-SP ~ 06 KTM 625 SMC ~ 72 Honda CB750/915cc ~ 92 XR600/654cc ~ 95 XR650l/675cc ~ 03 CRF450r ~ 05 CRF450x ~ 02 XR650l/675cc ~ 86 YZ490 ~ 93 YZ80 ~ 93 XR650l Project
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Old 01-16-2014, 06:23 PM   #3
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Joined: Jan 2007
Location: central komifornia
Oddometer: 1,151
While the carb is off make sure the intake manifold inside diameter is- full size.Not a rectangle restriction.These bikes came restricted and there was an intake boot + jet kit.The stock muffler can be uncorked and works good .IF it is uncorked the main jet will be a 175 68s pilot b53e needle.Safety issue-rh foot peg bolt fix.Info site

oldxr screwed with this post 01-16-2014 at 11:39 PM Reason: corrected info
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Old 01-16-2014, 06:35 PM   #4
Pig handler
Joined: Mar 2013
Location: Ukiah, ca.
Oddometer: 21
Sounds like the float level set to high. Might need to bend the tab a little.
Torturing motorcycles for 25 years

There is a little squid in all of us!
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Old 01-16-2014, 06:57 PM   #5
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Joined: Feb 2006
Location: Jalisco, Mexico 45825
Oddometer: 1,923
I think most run the 68s pilot jet.
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Old 01-16-2014, 11:41 PM   #6
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Joined: Jan 2007
Location: central komifornia
Oddometer: 1,151
68s-Its been awhile since I had a stock carb on my xrr.
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