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Does anyone have or know the whereabouts of standard rings for an xs 250 (4G6 ) engine? I have two complete 250 engines, out of those only one top ring is in tolerance. The outcome being, not enough compression to complete the suction to make the bike run once it reaches operating...

Hello Again Are pistons numbered 1M0-11630-00 standard for an engine numbered 4G6 007328 ? The bores measure 55mm and pistons measure 54.5mm. Would the above numbers fit my barrels. Yours in anticipation. Thanks a lot Edwin

Hello All I have come back to working on the 250se 4G. The harness has been off so now's the time to replace all the wiring. Now here's the thing;I have the starter circuit working correctly along with indicators and horn. My question is. Does the engine need to be running before I can check...

I'm not sure whether this is the correct place for my post. But here goes. My sons XS250 build is tantalizing close, but as you fellow builders will know things tend to conspire against you at this stage.My latest issue is the drum of the rear wheel is out of true resulting in the brake pedal...

Hi I am in the throes of building an xs 250 se engined bike for my son. My question is =- Is there an electronic conversion for these engines? If so where are they available? Yours in anticipation Edwin

I have been a visitor to your forum for awhile, reckoned it was time to join in. At present I have a family of xs's and sr's 750 se 250 se sr 250 japanese import and an sr 125. As you well know the 250 is a close cousin to the 400 hence a lot of the information on here is relevant I...