Lumenition do adjustable rev. limiters which are easy to install. If you want a rev limiter with a fixed max. rpm Lucas did rotors in the distributors that cut out at a specific rpm. I use them on my car, max 7000rpm. Kees Oudesluijs NL [demime 1.01d removed an attachment of type text/x-vcard which had a name of coudesluijs.vcf]