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Installed a PMA fom Mikes. Set the TDC mark using he straw-on-piston-in-plug hole method. When I start the bike, it rages with the timing way advanced an he plugs burn up in minutes. The unit fit perfectly when I threw I together. There's only one way it could go on. What the heck did I do...

Went to adjust the timing on my 83 XS650 after installing a Pamco Ultimate kit. In order for me to get the timing marks to line up, I need to rotate the Pamco so far to the left that I have to remove the bottom screw that holds the Pamco plate on. Anybody ever have this issue?

Been battling to get these things tuned Needle Jet=159P6 Needle=6D97 PJ=20 (tried swapped out 22.5) MJ=180 Air jet removed I've read that as a baseline, to set the slide heights with a 5/32" drill bit. In order for me to do that, I need to turn my throttle adjust screw out 6 turns to...

After reading my owners manual, the rotor/stator in my XS dont look stock. Anybody have any idea where this combo could have come from? The motor is supposedly an 83' but I'm beginning to believe that it's a mix-match of parts. The stator doesn't have a "F" and the rotor doesn't have a white...

I got this XS motor with Mikuni carbs that (i dont believe) are orig XS carbs. How can I tell what model they are? Dont see anything obvious on the outside of them.

I bought this 83XS for cheap and I cant get the clutch to work. The worm drive is working and the pushrod is moving back and forth. I adjusted the 2 every which way possible. I havent tride engaging the clutch with the bike running. Just by pulling in the clutch with the bike off and in...

This is my 1st XS650 build. Looking to get some opinions on this.......Made my own pipes from a mixture of 1.5" OD bends and stock XS pipes that I have laying around. The pipes are mocked up and at the head, there's still about 8" of that inner tubing still there. So it basicall goes from...