Can anyone tell the the type of Keihin main and slow jets that are needed for a 1991 MC21 NSR250SE. I want to rejet the carbs and find that the places that sell Keihin jets sell several varations. Does KEIHIN
ROUND MAIN JETS N424-36 and 99101-393 sound familiar? These are 8mm in length and 6mm head diameter. What about KEIHIN SLOW JET N424-21? Any response will be appreciated. Thanks.

Skunkbait