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Anyone have any other ideas? Thanks

The cap is new, and I've opened it intermittently while testing this. The symptoms appear to be a function of heat

Hello, I have an issue that I cannot find a solution to. My 1980 Special starts first kick, has a steady idle and rides fine for ~40 minutes. During the first 25 minutes the idle rises about 2k, which I adjust for with the idle screw while i'm at a stop light. Consistently, around the 40 minute...

I plan to buy the 1.5mm oversized pistons from cruizinimage and have the cylinders bored to match. Havent been able to find any info on whether this requires an oversized head and base gasket, or if stock sized will work? If oversized required, anyone have any links to good sources?

Here's an update. When i simplified the wiring harness, I ran the yellow alternator electro-magnet wire off the R/W ignition line. In testing, i noticed that if i unplugged that wire (removing power to the rotor) The erratic throttle behaviour stopped and the bike revved up past 3k RPM normally...

I have a 1981 Special, i had it running for a couple of weeks this summer with no issues, and all of a sudden while riding home from work the bike started surging and cutting in and out, with a weird sounding engine note. I tried giving it gas to keep it alive but it eventually died completely...

Update: Pulled the carbs and re-cleaned the pilot circuit. I also realized my rookie mistake of failing to clean the emulsion tubes. They were so crusted up that i actually thought they couldn't be removed the first time. Re-set both mixture screws to 2.5 turns. Next i tested if the old float...

Hey i'd like to buy the nicer ignition switch. Im located in Vancouver BC Canada, would you be willing to ship?

Hey forum'ers, I recently bought a non-running 1980 XS650 and have been bringing it back to life. First of all I want to say that this place has been extremely helpful for getting informed on all aspects of the bike, and most problems I've encountered there is usually a thread with great advice...