i'm stumped

[ron criswell]

You know on carb stuff, I know this isn't a real issue (I think) on single carb bikes, but I have noticed since I have been parking my Concours on the center stand instead of the sidestand, I haven't had rough running shuddering problems that I used to have parking the Connie on the sidestand and not riding for a couple of weeks. It was always running rough on the left side cylinders after a couple of weeks if I didn't ride it often. Criswell Sent from my iPad

On Oct 30, 2011, at 4:58 PM, Jeff Khoury wrote: > When dealing with these kinds of problems, first start with the simple stuff. Check the air cleaner/snorkel to ensure there are no blockages. > > A stumble in the middle of the range is almost always indicative of varnish buildup on the needle or in the main jet pathway. > > Take the carb off again and pull out the needle. Make sure it's COMPLETELY free of varnish. I've seen some so bad that you have to use steel wool or a polishing wheel on a dremel to remove it. Even a little varnish on the needle will create a stumble. > > After you're done there, take off the bowl and remove the main jet. You should be able to see light all the way from the main jet holder through the venturi. Use Carb cleaner and a rough pipe cleaner to ream out this passageway. I've even clamped a drill onto the pipe cleaner and spun it slowly for a minute or so to ensure all the varnish is clear. Keep pumping carb cleaner in there (K&W is the best, wear gloves and glasses when using, it will burn your skin) to dissolve the varnish. > > When you think it's clean... do it again. > > Re-assemble and I'll bet your stumble will be gone. Once you're to this point, no amount of additive will help you. You gotta do it by hand. > > ----- Original Message ----- > From: klrdon@... > To: "DSN KLR650" DSN_KLR650@yahoogroups.com>, "Paul" > Sent: Sunday, October 30, 2011 9:37:47 AM > Subject: Re: [DSN_KLR650] I'm stumped > > No real reason to suggest this except the rpm range of poor running seems > weird. Ignition module, unless that rpm range is a transition between fuel > jet circuits (idle-midrange-main needle jet) and I have no expertise to > offer either as the true issue )) > > Did you put a full rebuild kit in the carb? > > Don M > > -----Original Message----- > From: Paul > Sent: Sunday, October 30, 2011 10:47 AM > To: DSN_KLR650@yahoogroups.com > Subject: [DSN_KLR650] I'm stumped > > The problem: My '98 KLR 650 with about 30,000 miles, starts and runs good > up to about 4000 RPM, runs bad, raggedy, surging, hesitating, etc between > 4000 and 5000 RPM, then smooths out some and revs to redline. It's > rideable, I've been riding since May with it this way. > > Background: A year and half ago, a car hit me on the KLR. Wrecked the > radiator and fan, bent the subframe. I wasn't able to ride for almost a > year, so the bike sat. Finally was able to ride again and got it running in > May. I've put both Sea Foam and Techron in the tank, I tried to clean the > carb twice and so finally I brought it to a professional mechanic. He > cleaned the carb twice and replaced the diaphram with no change. Along the > way, I also re-built the fuel petcock and installed a new fuel filter. I > don't even know what else to check. My mechanic suggested maybe the > compression release, but I don't see where that could be it. I set the > valve clearances about 4000 miles ago, before the accident. New psark plug. > > Any suggestions? > > Thanks, > > Paul Streeter > Minnesota > > ------------------------------------ > > List Sponsors - Dual Sport News: http://www.dualsportnews.com > Arrowhead Motorsports: http://www.arrowheadmotorsports.com > List FAQ courtesy of Chris Krok: http://www.bigcee.com/klr650faq.html > Member Map: http://groups.yahoo.com/group/DSN_KLR650/app/peoplemap/view/map > Group Apps: > http://groups.yahoo.com/group/DSN_KLR650/grouplets/subscriptionsYahoo ! > Groups Links > > ----- > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.1834 / Virus Database: 2092/4584 - Release Date: 10/30/11 > > [Non-text portions of this message have been removed]