smudger
Well-known member
Still struggling with the bogging down of my 1991 ZX7 at high rpm (above 7500) even though carbs have been thoroughly cleaned & the (Dyno) jets re-set to factory spec for the OEM muffler.
Am now thinking ignition system, maybe too much load for it at high rpm????
Or perhaps the spark from 1 cylinder is not strong enough to cope with lots of fuel at higher rpm as someone following me at Cayuga yesterday commented that when the bike sounded to run rough at rpm's above 7500 they saw a puff or 2 of black smoke from the muffler?
The bike has the 3 Ohm Dyno coils on it & I noticed that the rubber cap over the HT lead & top of the plug cap on cylinder #4 has some little splits in it, would that make a difference?
Smudger
Am now thinking ignition system, maybe too much load for it at high rpm????
Or perhaps the spark from 1 cylinder is not strong enough to cope with lots of fuel at higher rpm as someone following me at Cayuga yesterday commented that when the bike sounded to run rough at rpm's above 7500 they saw a puff or 2 of black smoke from the muffler?
- What would prompt you to remove the plug caps & trim the HT lead & re-fit the caps?
- How do you trim/cut the HT lead?
- How do the leads come off the coil - pull off or screw off?
The bike has the 3 Ohm Dyno coils on it & I noticed that the rubber cap over the HT lead & top of the plug cap on cylinder #4 has some little splits in it, would that make a difference?
Smudger
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