O.K. here it is just baseline dyno'ed my little scoot on a chassis dyno 75.3hp@11,110 and 36.47 lb.ft. 10,205 rpm with an air fuel of 10.4 average one things for sure getting plenty of gas GOD what gives with that it has stock jets and filter (Ithink the filter is stock) has vance and hines slip on that's it. It's a 92 stock cbr 600 f2 got to put out more hp than that doesn't it?

 

Oh and you could see the gas smoke (black )coming from the pipe like a kenworth semi

 

The black smoke would lead me to believe you were running too rich. Could be a carb problem or spark problem...or even not enough air. But ya, 76 is prolly at least 10hp off what stock should be.

 

for a f2 with a good amount of milage id say u should be closer to 80. need a tune up and if u like power u DEFINITLY need to ditch the stock mains and pilots, dont f#ck with kn filters they kill your midrange buy yourself some irdium plugs a new papper filter and some new jets. mines runing around 90.

 

got new carbs,coils,and d&d exhaust coming came off a really good running bike also have new honda racing air filter and 7 series plugs then will see what's up with this thing. If that doesn't work then it's off to the work bench.Has too many miles on it to go any further.I'm going big bore.

 

dude if you have a good pipe you can get 90hp for less than 200$ simply by rejeting. f2 carbs have way more pontential than their jeted from the factory. said u was running rich right? reason is the when the epa did their emissions test on these bikes they were testing avereage LEGAL highway speed which islow rpm andmidrage so to pass honda jeted em lean as hell in that range and compensated for it by jeting rich as hell up top. so to get max pontential outta them is to richin up the pilots (use 40s) and lean out the top (i use 124 mains) believe me the power difference is outstanding especialy in the midrange. high flow filters rob u of power if u rejet because your making more air flow so your leaning the mid which is already to lean and leaning the top which your already doing with smaller mains there for could result in overkill, although.............................no replacement for displacement

 

124 mains???? this thing has 135s' was told that was the stock size.arrrgh well I have another set coming that is matched to the pipe.damn it that was money wasted I guess but one of my carbs kept dumping fuel in the cylinder any way

 

yep 135 is stock but its jeted rich in the mains to compensate for lean in the pilots....damn epa. i should have cleryfied i have jeted mine through and through so 124 are not stock but way better than those jumbo stock jets.

 

so what's stock?

 

135 is stock what u got is stock.the set up iam suggesting is a jet kit and some new pilots.stock jeting is very insuffecent but honda had no other choice because of u.s. emissions laws at the time.