Bike: 1986 Kawasaki ninja 600r ( ZX600a or GPz600a )
Miles: 47k
ISSUE:
I was riding the bike about a week ago with some friends. I went to pass my friend and went WOT in second gear, upon getting to about 9k RPM the bikes exhaust note completely changed. i knew something was wrong so i pulled the clutch and she barely was able to stay alive. Sounded like she was missing an entire cylinder. the second she came to a stop the bike died. I restarted and limped her home having to keep on the throttle at every light. I wasn't running a fuel filter at the time and my tank was very rusty (lesson learned)
So now once she warms up she revs and ideals fine, I can Rev her as high as i want and the throttle responds quick and fast. Once i get on the road however i have a really bad stuttering issue that begins at 4000 rpm and wont let up till about 6000 rpm. During this band the bike is backfiring and the exhaust note COMPLETELY changes tone, sounds like im hitting a wall (rev limiter). Happens in all gears at that givin RPM range. If i go WOT i can power thru it no problem all the way up to my top speed of 115 and hold that speed. Can i please just get someone to point me in the right direction?
Things tested:
Pulse Coils they were @419 and 430 ohms a piece, in spec.
Coils - Primary: 12.1v and 11.8v, 0 at key off
- Secondary: couldnt get a reading but i am getting spark on all 4
Swapped CDI with known working one, issue persisted.
Added new fuel filter and dowsed the carbs in carb cleaner with assistance from a 150 psi air machine. They very slightly dirty.
Cleaned CDI connector and Junction box connector.
Miles: 47k
ISSUE:
I was riding the bike about a week ago with some friends. I went to pass my friend and went WOT in second gear, upon getting to about 9k RPM the bikes exhaust note completely changed. i knew something was wrong so i pulled the clutch and she barely was able to stay alive. Sounded like she was missing an entire cylinder. the second she came to a stop the bike died. I restarted and limped her home having to keep on the throttle at every light. I wasn't running a fuel filter at the time and my tank was very rusty (lesson learned)
So now once she warms up she revs and ideals fine, I can Rev her as high as i want and the throttle responds quick and fast. Once i get on the road however i have a really bad stuttering issue that begins at 4000 rpm and wont let up till about 6000 rpm. During this band the bike is backfiring and the exhaust note COMPLETELY changes tone, sounds like im hitting a wall (rev limiter). Happens in all gears at that givin RPM range. If i go WOT i can power thru it no problem all the way up to my top speed of 115 and hold that speed. Can i please just get someone to point me in the right direction?
Things tested:
Pulse Coils they were @419 and 430 ohms a piece, in spec.
Coils - Primary: 12.1v and 11.8v, 0 at key off
- Secondary: couldnt get a reading but i am getting spark on all 4
Swapped CDI with known working one, issue persisted.
Added new fuel filter and dowsed the carbs in carb cleaner with assistance from a 150 psi air machine. They very slightly dirty.
Cleaned CDI connector and Junction box connector.