250-500cc WR250 04

most coils use the same ohm reading, you can plug it into another ignition if you have more than 1 bike, these are early design ignitions

Im no guru at this stuff . My primary coil resistance (across coil) is .5 ohm and secondary ( from wire going into to coil to plug ) is 17700 ohm . Both seem low to average (especially primary ) but not sure on what they should be .

Haha, yep seat of the pants for sure, but beats a snapped kickstart, cheap and easy to replace.

I tried swapping carbs to a newer Mikuni and its seems to be better so I am thinking its carb related


The newer carb doesnt fit well as its too short front to rear and would need a newer - longer intake boot - I believe

So trying to sort original carb
I don't think its float height and Ive got lean settings on pilot , needle and main

Im not sure what could cause the carb to run rich from mid to top end . Lack of air flow - where ?


What do you do when you rebuild a carb ?

hey Rockdancer just curious did you ever get this sorted?

Yes . I changed the float needle and its seat and the float from a spare carb I had . I had to make sure it wasn't too rich on the needle setting but it was ok .

did you get the clutch pull nice and ez yet?

It was ok with a new cable . It needed money pouring into front suspension and I wasn't that happy with top end power so I moved the bike on .