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Hi fellow street fighters, I've just converted a 98 Cat into a streetfighter. I'm really pleased how it turned out. It spent many months at the mechanic trying to sort out a problem i had with the carbs. It is still not completely sorted. I bought a replacement 99 set of carbs and after much effort it ran quite well except for the band between 3.0k and 3.5k. Within this range it stutters or judders. Above and below this range it runs nicely. I did the carb mod to the airbox, i.e. ran the vent tube up into it. I am using the stock YZF air box and remove all the plastic tubes that pass through the frame. I just have a home made air scoop with a mesh opening, all of which is bolted to the outside of the frame. I do not know what number of turns the idle screws are set at - that is something i need to check. It might be running a little rich, not too sure. Need to check the plugs and maybe put a colour tune on them. I did not change the jets or needles, the are stock. i don't want more power (scares the crap out of me as it is) but i don't know if i should change them to a dyno kit to solve this annoying problem. The exhaust is very slightly shorter than stock while i was replacing the rusty insides.
Any ideas on the stuttering would be really appreciated.
Any ideas on the stuttering would be really appreciated.

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