I recently bought a 1992 Suzuki GSX600F Katana, and after learning to ride at low speeds, naturally I started to go faster. It pulls fine at low RPM, but once I hit about 7000-7500 RPM, the power starts to cut out sporadically. It just doesn't seem to have any energy above 7500 RPM. Also, if I'm cruising on the highway and give it partial throttle, it accelerates smoothly, but if I give it full throttle, it does the same "sputtering" routine. I replaced the spark plugs and noted that the ones on there showed signs of a too-rich fuel mixture. So I pulled the new plugs out after a week to check them, and they're showing the same signs (really black, lots of buildup). Could this "sputtering" at high RPM be related to the improper fuel/air mixture, or does it seem like ignition problems could be to blame? In my previous experience with race cars, high-rpm "sputtering" like that was almost always ignition-related, but I'm not sure about with motorcycles.
2007-05-27 10:06:05 · 2 answers · asked by Spl1nter 2 in Cars & Transportation ➔ Motorcycles
Check the cylinder compression.
Worn out piston & rings will allow crankcase oil to get past the rings.
The oil will mix with the fuel in the combustion chamber and foul the spark plugs.
2007-05-27 11:48:56 · answer #1 · answered by guardrailjim 7 · 0⤊ 0⤋
Does it have a stock or aftermarket exhaust?
Either way, its probably jetted wrong.
Try here
http://www.maximum-suzuki.com/forums/index.php
2007-05-29 14:31:48 · answer #2 · answered by 1crazypj 5 · 0⤊ 0⤋