ok was riding yesterday with a group. I was in the middle so no hot rodding when we came to a stop after about 60 miles I noticed I was running on one cylinder I reved it a little and it came out of it first thought was a fouled plug so stopped at a auto store and changed them. it still did it so I headed for home ran fine except at an idle. so far this is what ive done changed plugs and wires checked for air leaks checked compression 218lb checked pushrods not loose or bent and the coil is sparking im leaning towards weak coil. or I hate to say it a faulty ignition dyna/ultima. anyone have a thought on this.

 

My 2 cents would lean towards coil mostly or ignition.

 

Crank it up and see if it'll jump a 1/4" or more gap to the fins with a screwdriver in the plug boot, not the coil or ignition if it jumps a good size gap.
Unless firing out of time if running single fire, I doubt that though.

 

Mine the crimp was bad and vibrated loose on the signal wire from ignition at the coil terminal. Recrimped boom back to 2 cylinders! Start with the simple stuff 1st I tugged on them how i discovered it

 

Confirmed, I had a coil do this

 

you guys are getting good it was the coil. bad thing is I can only buy the angle coils in pairs 165.00 so I guess ill have a spare

 

You need a Woods 9F to go with the new coil, performance updates comes in pairs to compliment each other.

 

already have the W9B I don't think I have enough clearance or compression for the F

 

D, I know you have some health in that motor. Is it an 80" or ?

Btw glad you got the issue situated.

 

Trying to spend your money, makes me feel better