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EVO 1 is the engine you are talking about, then there is some things you should do before you get to many problems.
1. The kehin carb should be changed to CV or another brand like Mikuni.
2. Ignition, change it all. Remove rotor and pickup, buy a nois cone ignition.
3. Normaly the clutch hub has one or more broken leaders. Change this to a stainless steel.
4. If you have a 5 speed, there can be some other things that you would control, let me know if it's a 5 speed.
5. RIDE
I went for the ignition system from daytona twin tec. Never had any problem after. Remove all inside the nosecone, add the cup, (not included) and install the ignition. Buy the one with coil included (I went for the one with two small single fire coil, but they also have one single fire coil that fit on your frame, at the same place as the old one)
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