what can i do to get more rpm? i tried on a athena unlimited cdi but was half a HP less. maybe lighten the flywheel? i know a rotor ignition would be best but obviously you have no electrics then. Ive ordered a 24mm carb kit, will this help? spec is below cheers
why do you want more rpm? more rpm doesent necisaraly mean more power.. usually the opposit... the only way to get more rpm out of an engine is to time it harsher (port the barrel) or replace the kit for a kit wiht harsher timings. you will need the exhaust apropriate for making power at this rpm tho.
Yasuni C21 and a mild sport kit really don't go together. As minor said, you need to port the barrel, get someone else to port it or buy a kit suitable for your exhaust.