as above

American import 1995 cb600 f3, im goin to race in pre 97 championship here in Ireland

got her to a dyno to find she only running 77 bhp, put some jets in, some polishin, checked cdi and she up to 82

majority of the racing cbr600 pre 97's are running 90 bhp

discovered that californian cbr600's had an emissions restriction,
have left a set of replacement stock cams with mechanic to see will this solve the issue and give her a few more ponies

if not compression ratio may be off? and 82 as good as i get

unless someone here can suggest some other way of gettin rid calif restriction and upping the horsepower at least another 8bhp

thanks in advance

 

I also have a cali version and wanna take all that junk out. I have looked all over the internet for a write up. I dunno how many horses its actually are lost though

 

Well if I cant find out anything further on here, we will see if replacing the cams makes a difference..

A full race exhaust system would be another expensive option

 

Is there any chance there is something wrong with your bike? My buddy has a 2008 zzr600(same as a 2002 zx6r) And we when we race you would think the bikes are pretty much the same until we are in like 3rd or 4th gear, this is why I dont think the emissions stuff effects the power too greatly.

 

no, nothin wrong with bike, got a reply elsewhere that the difference between californian cbr600 f3's and ours is restricted cams, so the stock cams are goin in tomorrow and see what happens then

 

Ohh I thought it was just the extra evaporator or whatever... just some different plumbing for the airbox. Let me know if it feels any different after the new cams

 

the restrictions was definitely in the cams, new cams in made the difference

went from 77 bhp, polished carbs and jetted em
to 82 bhp
removed restricted cams and put stock ones in
up to 88bhp
fueling off now, ordered new dynojet kit, hope bike is ready on tuesday for collection, because its being loaded into a truck on wednesday to go to track at Almeria, Spain

 

Thats great to hear, thanks for the heads up

 

New Dynojet kit in

Up to 98.3 Bhp on dyno

Serious work from Steve in North Dublin Motorcycles (NDM)

carbs polished and restricted cams replaced with stock

78.9 Bhp to 98.3Bhp

You cant beat it with a big stick

 

Bhp is the same thing as hp at the crank or the wheel?