Hello new to forum:
I just bought A 1993 Cbr1000f W/stage 2 jet kit so I was told it had and a V&h Exhaust.
OK the problem is around 2800-3200 RPM 3rd gear it makes a weird noise and jerks around I don't notice it as much at 55-65 Mph or at all during a high speed take off.
When i pull the clutch in it goes a way the chain and sprockets look good about 1/2 worn rear tire 98% worn. has 24600 miles.
Any ideas suggestions Thanks in advance.
Will post pics when I get the right to.

 

Welcome Jafo - reckon your pilot jets and pilot screws have some debris in them and
may need a cleaning

 

Thank you and I will try and take them off asap and clean them
will let you know how i make out.

 

Good just don't blow the beejaypers out of them with compressed air or you
may rip the sh!te out of the slide diaphragms

Pull all slides out the top of the carbs caps before going that route

also seafoam now make an aerosol with a long "straw tube" that can be
"shot" down the pilot air holes on the top side of the carbs under the caps
Open all float bowls removes all caps and shoot this stuff down each air
hole until it drips out the bowls.

This method can save you having to pull the carbs completely off.
May not work though if there's a chunk of rust or something in there.

Also check you tank for rust because if it has plenty you'll need to
treat that first or you'll be forever cleaning the carbs.
Ask me how I know this

 

All good advice !
(ask sprock why his nickname is RUSTY) HEHE
Seafoam at 2x concentration did the trick for me !
A good inline fuel filter is worth its weight in gold with these older bikes.
I hesitate to remove the float bowls due to cost of new gaskets @$90 + per set !
Be careful with them.

 

Thanks for the advice I'm on a real tight budget and as soon as i can get some sea foam I will try this and let you know how it works out.
How long do i have to wait to post pics ? keep getting the v message.

 

Also with the V&H pipe it is critical to get the carbs as balanced as possible.

The 4-1 pipe is a tuned, all out performance header. You give up some low end smoothness for higher RPM, RPM makes HP.

If the carbs are way out of sync, you'd think you were riding a pogo stick at the RPM's you mentioned. It would feel like the tires were egg shaped rather than round. It would go away under load however.

After checking the jets, a good carb sync is needed I think. Even so, it still won't be totally smooth with that pipe.

One more thing, the ethanol in the gas works against you in that same RPM range. E-gas produces a stumble at those RPM,s. That combined with the pipe may make things worse. A more open throttle would clear the pipe and smooth things out.

 

Plan on getting some sea foam Today.
dumping it in and You hit the nail on the head it does feel like
the tires are egg shaped at that Rpm range.
I do know someone with a syc tool so will work on that next and will let you
know how things work out.

 

cool jafo ! there's two types of Seafoam the liquid you dump in the tank and the
spray with the long reach straw tube

Ithaca NY eh ? you are near to few of us man

 

OK I Bought some sea foam and dumped it in the tank at about 1 3/4 oz to a gal of fuel ran the bike short distance and now letting it sit till morning to clean things out for my 80 mile round trip ride.hope this works.
and I have not seen sea foam in a spray you have a name of the parts store so i can purchase A can??
and to the few i am near to hope to meet you some time in the near future.