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    1978 XS650 won't stay running

    Hi Everyone, I have a 1978 XS650 SE. Bike is stock and has been semi-restored. Motor is fresh, ignition system is fresh, valves adjusted and cam chain adjusted. I can't seem to get the bike to run off choke. It will run choked, and run if I give it a little bit of throttle without choke (while...
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    Mikes-xs/aftermarket pistons/rings VS Yamaha NOS pistons/OEM rings

    Hi everyone, so I finally was able to get a hole of a bore gauge and micrometer to measure my cylinder/pistons. Cylinder is in spec and almost perfectly round. Pistons however, not so much. pistons are about 0.015" sloppy... So I'm going to replace the pistons and rings and get her back up...
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    1978 XS650 SE will not rev

    Hi everyone, I'm currently working on a 1978 XS650 as some of you may know. I'm having an issue with the bike, as it will idle fine, but it will not rev unless on partial choke. I'm sensing I have a fuelling issue. Here's what has been done / tested so far; -Exhaust taken off - no real...
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    1978 XS650 Engine knocking noise

    Hi Everyone, I have a 1978 XS650 that I just brought back to live after being stored away for 31 years. It was stored away after the owner ran the bike low in oil, and then heard a knocking noise the next day. What a surprise, I have a strange tick/knocking noise. I'm afraid it could be a rod...
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