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Helix/Cam

Helix – Helix and engine power peak  Exhaust pipe temperature influences the RPM that peak horsepower occurs at. The engine starts, exhaust gas starts to enter the pipe. Heat transfers from the exhaust gas to the wall of the pipe. The pipe starts to warm up....

Shift Ratio

Shift Ratio; this page is to show how powerful the [what I affectionately call ] “Felt Marker Trick” is. This is part of chapter 6 out of my [incomplete, always adding to] clutch tuning handbook. 06 – The Driver The Driver (primary) (AAEN) 06-01: The...

Springs

Question) Hi Joe, I have a MX-Z Adr/2006 800 p-tek button secondary w/1.25 track. I took my secondary apart last night and noticed that I’m running a stock green spring, at that time I opted to stay with the stock green 180/300. What would the performance difference...

Engine/Compression/Jetting

Engine Fitness – Engine has high miles. Compression check? Question) My sled has about 6000 miles on it. What can wear, what can I look for? Answer) With 6000 miles on your sled, how many miles does engine have? I want to know what kind of shape your piston...

FLYWEIGHTS (APPLICATION)

Flyweight – Going from stock engine to big bore, change flyweight? Question) Have your clutch kit on stock 800R x 154″. 15.3g for 8150, clicker 4. Dropping in 860BB. Currently have your mountain kit installed. What do you recommend for a set up for this...