speed problems

[medicrider]

So, I was riding with a group of people and I was noticing I couldn't keep up with them when taking off and at speed. When I got to 90mph and started giving it more throttle I got not response from the engine. no matter if it was a little throttle or wide open. I was thinking carburator needed to be cleaned/rubuilt? any ideas? Really no other problems though.

[phil823]

fuel delivery issue (petcock or filter)
carbs
vacuum leak

those would be my first ideas

you could do a plug chop...

[Kreylyn]

Um... what gear, rpms are you talking about, and vs what other bikes?

Krey

[WildSide]

more info needed! I also wonder how the bike would act if you where in 4 gear and then snaped the gas wide open and see if it chuggs or acts like it running out of gas, if it did i would check the fuel delivery system.

[medicrider]

with other 600s to 1200. a couple of cbr 1000 a busa a couple of ninjas. I know mine will never have the power the bigger bikes have but something didn't quite seem right as it has before when I was with them. As far as gears from 5th up it started giving hesitation. 4th seemed fine. but at 90 it started acting up like no matter what I did with the throttle, no difference in performance. I was geting to about 7-8 rpm before I changed gears. should I wait till I get higher? Just a note I usually don't run this fast just trying to keep up with the group.

also recently got new chain and sprockets but i don't think it would make a difference since i went with the same sizes as before

[Kreylyn]

with other 600s to 1200. a couple of cbr 1000 a busa a couple of ninjas. I know mine will never have the power the bigger bikes have but something didn't quite seem right as it has before when I was with them. As far as gears from 5th up it started giving hesitation. 4th seemed fine. but at 90 it started acting up like no matter what I did with the throttle, no difference in performance. I was geting to about 7-8 rpm before I changed gears. should I wait till I get higher? Just a note I usually don't run this fast just trying to keep up with the group.

also recently got new chain and sprockets but i don't think it would make a difference since i went with the same sizes as before

8.5k is just when you actually hit the power range... anything less than that is just cruising...

Yes, wait longer before shifting.

Krey

[medicrider]

tried shifting at higher rpms still same result, but I did get there faster. I think I'm going to try the fuel filter, cleaning the carb out and see what happens. if not I guess it will be going to the shop.

[Shipster]

What is the status on the air filter - is it stock or something else? If it is stock, when was the last time it was changed?

[crackedpot]

I'm new to this bike, but any gear I snap to 90+ and it wants to keep going.

[medicrider]

What is the status on the air filter - is it stock or something else? If it is stock, when was the last time it was changed?

as far as I know it's stock. I just got this last winter. I'm planning a change filters (air,oil,fuel) getting the carbs cleaned out and start from new as much as I can and see what that does for it.