[Yamaha XS250]

should not have any sparks jumping the points, your condensor has gone if it does!!

the points share a live feed which when closed "charge" up the coils.

to check your coils 4 ohms and 9.5k ohms should be measured on your coil wiring +/- 10% or swap over if one side is working.

I had problems with my bike bogging down under 5k revs and then trying to go over this. new plugs (iridium) cured this.

did you use the correct timing marks on the rotor? always use a strobe as when you tighten up the points the damn things shift, so i have to compensate so when it tightens up they are spot on.

Hi I have replaced the points and the capacitor, I now have a spark at both points, however my next problem is timing, the bike has not run since may07, and I am having to time the engine manually.Every thing is fine with the points gapped but when I loosen up the back plate to time the opening of the points by turning the back plate they do not close, how loose should the back plate be when timing the spark. Help

[Yamaha XS250]

I think that a new capacitor will be required.

thanks I have a spare I will fit that tonight

[Yamaha XS250]

MY XS250 IS REFUSING TO START, FUEL IS GETTING THRU, POINTS HAVE BEEN GAPPED AND TIMING CHECKED, BUT I CANNOT GET THE SPARK TO JUMP THE GAP ON THE RIGHT HAND POINT, POWER IS GETTING THRU TO THE POINT BUT NO SPARK WHEN STARTER BUTTON PRESSED, I GET A SPARK ON THE LEFT HAND POINT. HELP