[rstab319]

i had the same problem bcause i forgot to hook a vaccum line up. so a pinched line is possible. bikes are really funny when it comes to the air flow. just try to check them as best can.

LP Front& Rear Signals, shaved tail...more to come

 

[bs121583]

yes check the vaccum lines first and make sure they are secured correctly

yellow = fast

 

[Poch]

In my case (a 1994 ZXR400) one of the high-tension wires to the plugs had gone dead. I'm not saying it's the same case with you, but probably it's electrical in nature causing the power to go on and off which is why the bike is "bucking."

Good luck.

 

[josh1095_1]

theres 2 small tubes that are part of the ram air. they merge into 1 single tube and go somewhere on the carbs. this will cause without a doubt the symptoms you describe. it is very erratic and hard to trace due to wind flow being different. if your driving in the wind etc... im pretty sure the ram air scoops are the same on a 98. might be wrong, but thats how it goes on an 02

 

[Brian]

Does it happen in all weather conditions?
My 98, hardly ridden these days, suffers from exactly the same symptoms in cold weather, about 10c and below. Have been told it could be caused by carb icing and a new filter not just a clean would probably fix it. Never bothered to find out since I got the 03.

Confidence and Ability should not be Confused

 

[Schredder]

I have a 98 ZX6R which I've owned for about a month- problem free. Just recently I've noticed some bucking and loss of power at 35+ mph. I have to roll on the throttle some more to get the power back but the bike will buck (and lose power/gain power) repetitively.

The guy I bought it from said he had a problem like this about 2 years ago. He checked the fuses and battery (because it feels like it's something electrical); he cleaned the carbs, air filter and checked the fuel filter and the bike still did it. So the next day he took the bike to the shop where it sat for 2 days and when the shop took the bike out it was fine- No problem...until now.

I took it to the shop and they mentioned the possibility of a "pinched vent line"; [?] I was wondering if any of you have experienced anything like this or have any suggestions on what it could be?

--Want to ride again--

 

[Schredder]

It happens in the weather conditions we have here in So. California- warm and sunny; and cool and sunny. No icing out here in the last couple of years.

I'll check out the other items mentioned.

Thanks again for your help!
[8D]

Originally posted by Brian

Does it happen in all weather conditions?
My 98, hardly ridden these days, suffers from exactly the same symptoms in cold weather, about 10c and below. Have been told it could be caused by carb icing and a new filter not just a clean would probably fix it. Never bothered to find out since I got the 03.

Confidence and Ability should not be Confused

 

[Schredder]

Got my bike back on Saturday. Come to find out the bucking was from gunk down in the carbs. They changed the spark plugs and drained the floaters at the bottom of the carbs.

Thanks for all your help.
PS- Pacific Motorsports in Oceanside did the work and although they spent days looking for the problem, they only charged 1 HOUR of labor and NO MORE.

HIGHLY RECOMMENDED.