SOURCE: Honda CBR 900rr 95 Will not start
Check fuel pump is working(remove seat and tank)Although your bike has carbs,they are fed by a fuel pump(under seat and tank)
if there is no fuel getting pumped when you are cranking over,replace fuel pump relay(cheapest option)If still no joy your fuel pump is u/s.although hondas have a seperate small vacume type hose running off the back of the pump,any pump off a kawasaki zx7/zx9 will do the job(they are all made by the same firm)
SOURCE: rebuild the carb on a 98 honda cbr 900rr. Where
Dont rebuild unless absolutetly necessary or need to rejet. Try some Seafoam first, it might save you hundreds of dollars and a lot of frustration.
read directions on can or just try pouring 1/3 can into two gallons gas and really get on it ...it might clear up any hesitation or stalling if thats whats happening. I got mine at Autozone for $10.( And it fixed the problem after riding for about 15 miles.)
SOURCE: 1999 Honda CBr 900rr will not start just backfires
Has the bike been sitting for an extended period of time (a year or more)? If so, then the carburetors need to be disassembled and cleaned. Sometimes, if you are lucky, you can drain the stale fuel out of the float bowls and - with fresh gasoline in the tank, it may run. If it hasn't been sitting, perform a complete tune up (valve adjustment, replace spark plugs, change oil and filter, etc.).
If that doesn't do the trick, then there's a more serious problem. One, or more, of the required three things for combustion are missing: Fuel, compression, and spark (at the right time). Make sure there's spark - and it is happening at the right time. Check compression. You need to see at least 140 psi on every cylinder in order for it to run.
SOURCE: i have a 93 honda cbr 900rr. the gas is mixing
Could be the carbs (difficult).
It could also be lack of spark (easy fix if you only have to replace spark plugs. Fix is more difficult if you have bad spark plug wires or a problem with the ignition system that makes the spark at the right time).
In any case, the unburned gas has to go somewhere so it runs down the cylinder wall and the piston rings will not seal well enough to keep it out.
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