RPMs at 60 mph : Kawasaki ZX Forums: Kawasaki Ninja Forum

nexus77241 · 07-03-2009, 04:20 PM

Hello everyone. I am a brand new rider and just got a 2009 Kawasaki 250. I was wondering what your engine rpms are at 60 mph. My bike is between 8000 and 8200. Two of my friends have brand new 250s and their rpms are 7000. I brought my bike back to the dealer and they say that there is nothing wrong with mine (even though its rpms are 1000 to 1400 higher than my friends'). The dealer is refusing to fix it. My question is: What RPMs do your bikes rev at at 60 mph? I know there is a problem, but the dealer is refusing to help me.

Thanks!!!!

Hammerhead · 07-03-2009, 05:28 PM

Your bike doesn't need help, just a little education for the rider. If your bike is turning 1000 rpm more than your friend's identical bike at the same road speed, it's obviously geared lower and will accelerate quicker. If you want to trade some of that acceleration for a bit more top speed (lower rpm at a given speed) you need a slightly smaller sprocket on the rear or a slightly bigger one on front. I would advise not to change the front by more than 1 tooth either way and don't change the rear by more than 3. If you are gearing up to match your speed/rpm with your buds, especially with a 250, you could run out of power if you go too far.

nicoj36 · 07-03-2009, 05:43 PM

i thought some of the new 250's have only 5th gear? not sure if its true tho

but hey if your friends have the lower years classic version of ninja 250 then thats okay

because the classic ones 2007 below have actually more power than the new ones
even at quarter mile they're faster ive seen from specs

your bike is brand new man theres nothing wrong with it
maybe you should take it easy since u just got it u know the breaking in
but who knows just my opinion

nexus77241 · 07-03-2009, 09:05 PM

the bikes are both brand new and have the same exact gears. I found on another forum that there are a lot of people that are having these problems and Kawasaki is fixing it for them. The hotter it is outside the higher the bike revs over what it should be doing.

clarkmanning · 07-03-2009, 09:56 PM

Quote:

Originally Posted by nexus77241

the bikes are both brand new and have the same exact gears. I found on another forum that there are a lot of people that are having these problems and Kawasaki is fixing it for them. The hotter it is outside the higher the bike revs over what it should be doing.

Then it could only be a slipping clutch.