Runs Rough Over 4000rpm

[aussie7]

Ok, I did a bit of a search and have come to the conclusion the carbs are at fault

Bike is a 06 750 gsxf (katana) with 72,000k's

Problem is the engine is smooth on acceleration from 2500rpm to 4000rpm through all gears

But when you go over 4000rpm in all gears, the bike runs rough

Do I need to get the carbs cleaned, balance or something else ?

TIA

[92xjunker]

Cleaned.... since the main jet starts to come in at 3000 rpm, I'd suspect clogged mains or slide issue.

[aussie7]

Cleaned.... since the main jet starts to come in at 3000 rpm, I'd suspect clogged mains or slide issue.

thanks for the quick reply, now how much will this cost

[shpielers]

If it's just a clogged main...$10 for cleaner... Very easy to do yourself. Remove carbs from bike, remove mains from carb, soak in cleaner, reinstall, reinstall carbs, sync carbs, ride on

[SilverKat1000]

I would also check float levels while in there if you decide to do it. The floats can bounce over time and adjustment can change.

Or drop it off at a shop, last time I checked a carb clean was around 250.00 but that was a while back.

[aussie7]

thanks everyone for the replies

I'm taking it to the shop, cost is $110 per carb or one hour per carb for cleaning and everything else involved.

I don't have the time or know how to do it myself.