ok here is the deal, whick one gets better results the hmf slip on or the end cap. i will rejet both plus use a better filter? The hmf ia 220.00 and the end cap is around 100 with the jets and filter?? also someone tell me where to find a stock clutch. i have decided to go stock with rwr springs, i need a web site or phone number, for the only dealer within 50 miles, we had a MAJOR fallout. thenks JOHN

 

If you don't need a spark arrester go with the end cap. if you ride some places where you need one then go with the hmf. Stock clutch with woods springs is a great setup. You can get the clutch from HPResearch, Alba Action, TVI, On dunes, ect.

 

I just installed an on-dunes disked end cap, K&N air filter, re jetted and 60% clutch springs last Thursday.
Went riding Saturday – Tuesday and was very pleased with the increased power.

 

well i made my own end cap for like 10$. wow it will run with or ahead of most any four stroke in our riding area! it will even out run stage 2 and 3 ds's sometimes. so the end cap made a world of diffrence on mine. just my opinion though good luck!