Greetings from Latvia, Riga!
I recently bought a 2000 XJR SP. Silver top carburettors.
It has 36Y inlets, Remus 4-1 full exhaust, modified airbox, but with stock carburettor settings.
It was running quite weak, with a big flat spot at 4000rpm. The power was too weak. So i raised the needles 1 step. And fitted 102,5 main jets and 42,5 pilot jet. Stock jets are 95 main and 40 pilot. Cleaned the carburettors and put everything back together. The bike now runs great! The power is superb.
But the problem now is that when ride it with full throttle after some 3-4 seconds is starts to stutter and the acceleration stops. If i let off the gas and then rev it again it goes again for 2-3 seconds and starts to stutter again. I put in 115 main jets, but the problem still was there and the bike was running too rich.
What could be the problem?
I checked the floats and fuel level, and everything is good. Changed the fuel filter. Changed the spark plugs.
Maybe someone can help me... unfortunately no XJR forum in Latvia...
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