Originally Posted by
Brad from Oz
Well, I just threw on a new dizzy cap and a set of Bosch "Motorsport" leads to see if that got rid of the miss, as gaping the plugs down to suit the LPG made it better but didn't fix the miss. Sweet, it starts heaps better, runs sweeter and the miss is pretty well gone, grouse - I'll take it for a run and blow out the cobwebs.
It ran well into town, did a few jobs around town, all good. Back onto the highway home it ran hard at 110, full throttle pulls and it was strong, and I was happy
........but then all of a sudden it started dying out. At idle or light throttle it was ok but put the foot down and it was lights out
, threw it back on petrol and it was a bit better but I had to limp it home.
So I'm thinking maybe the old coil is getting hot and breaking down?
What do you all think?
You might be right about the coil.
I had an old Yamaha RD 250 two stroke that would start and
run fine for a while and then start missing, stalling etc.
If it died it would not restart.
Leave it for a while and it would be fine.
Took a mechanic hours trying to find the problem.
Turned out to be the coil on the right cylinder was breaking
down when it warmed up.