whats wrong wit this picture

[killasmilez]

Somethin is wrong here or it may be me..but when i get into 3rd...i cant go over 60....in 2nd i can get up to 80....i only have a yzf600r...do u think i might be messing somethin up if i keep goin 80 in 2nd gear? what could be wrong because say im goin 80 in 2nd then i shift to 3rd...the bike starts to slow down and wont go over 60 even in 5th and 6th it wont speed at all...does anyone know what the problem could be???????

[aussieidiot]

could be a number of things. i had a similar thing and it turned out to be fouled plugs

[danmdevries]

Never came across this personally until today on a friends bike that he brought in to me for some repairs. Engine would rip through first and second gear, once I hit third, 4th 5th, with that extra load it would sputter around the midrange in the powerband, but if I pulled it to the redline in second, then shifted to third, redline 4th, I could avoid the sputtering.

The cause on this bike (honda parallel twin, dunno size or year) was a number of things, I reset the timing, replaced plugs, wires, coils and pulled the carbs and cleaned them, seemed almost like solid deposits were in the bowls.

What I'd say is causing that, and why it is only in first and second is the engine is able to rev up in those gears with little load and it's easy for the engine to rev right past the point where its unsure of itself. Do this, go easy on the throttle, slowly bringing it up through the powerband, is it shaky at some point? I'm thinking the 2-3 shift is dumping your engine right into the shaky area, where it's going to sputter and lose power. Pull the plugs out, check them against a chart in the back of every chiltons/clymers/haynes manual and see what it says, while they're out replace em for the hell of it. Pull the carbs out, clean em out at least, if you have the time and knowhow, rebuild em and retune (I do it every time the carbs are off the bike, might as well, right?) And maybe replace the wires, but that should cause problems at any rpm.

Hope this helps you some, keep me updated.

[danmdevries]

Oh, and I don't know what the gearing is on your particular bike, I'm a fan of sub-600cc bikes... but I'd say if you're hitting 80 in second, you're probably getting mighty close if not past the redline, so yes, you are hurting something by doing that. Stop riding, I know it hurts, but fix the bike. The last thing you want is for it to completely die out on you while you're out on the road leaving you stranded