sputter in low 2k-3k rpms

[Gsxxx600]

Hi all,
recently my bike has a sputter when i pull out in first gear, specifically between 1k and 3k, almost feels like it will stall, but once I reach 3k+ the power has returned and is there through out the entire rpm band above 3k

This has just started a couple days ago, I have new plugs (2-3 months old), and never had a problem with the carbs before...I went out and bought STP fuel injector cleaner, so hopefully that might help.

Any ideas?

[arsenic]

probably carbs. Clean and re-sync. That should sovle your problem. If it's sputtering becuse your engine is starved of fuel you may be running lean. Possibly adjust your fuel to air mixture. By the way use techron fuel system cleaner, considering you don't have fuel injectors, STP fuel injector cleaner will do nothing for you.

[Gsxxx600]

no, its for carburated engines as well, its just called injection cleaner (something similar to that)..

I dont know how to clean carbs or resynch, or adjust idle mix...and i know its not cheap at a shop...sigh

Thanks

[arsenic]

well check that all spark plugs are tight if they are loose you may have low compression and that could cause it to run rough at low rpm's. Could also be weak spark, like a coil problem.

[Gsxxx600]

hmm interesting, didnt think of that

[Aramis]

Had similar problem last summer.

Started about 10-15 minutes after stopping at gast station to fill up.

So the next morning, drained fuel, added fresh fuel from another place, ran fine the next ride. Guess I had some old gas, or maybe even some water in there... Lesson learned, always fuel up at stations where many people go, that way gas in their tanks is never "old"...

My 2 cents...

[Gsxxx600]

Yea, I was thinking about that as well, maybe Ill go up another grade (91)once this goes empty.

I hope its something as simple as that!

[md86]

Don't go up a grade if that's what was working before . Otherwise you're just paying more for less performance .

[illinoiskat]

It could be that your float is set too low. I put a jet kit in my bike and am looking at the tunning page, it indicates that my floats are too low. SInce bike has flat spot at 2-3k.

[lucifers_ride]

I have the same problem..... And was reading thru my bro's jet kit papers and read that..... I think I'm gonna rip the carbs off and up the floats and see what happens.....

[Gsxxx600]

well the strange thing is, i havent put a jet kit in, its stock...ive made no mods to it, but in any case if that helps you guys please fill me in

[sharpie6]

It could be that your float is set too low. I put a jet kit in my bike and am looking at the tunning page, it indicates that my floats are too low. SInce bike has flat spot at 2-3k.

I know this thread is way old, but how did that work out for you? I'm having the same sputter problem in the same range.

[arsenic]

Last Activity: 06-10-2006 10:43 AM

[Robgsxf750]

Just under 4 years. Oldest Zombie I've seen yet.

[mini]

oil change

Anyone know how many quarts of oil I need to add when doing an oil change? I put three but it's cutting off when I put it in first gear.