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. More...

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 driving clutch...

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 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 rings are...

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 kit at 6000...

G4 Chain and gear chart 2019Gearing - Mountain Specific If you ever want to regear, it’s not a problem with this kit to go any of these ratios, in fact my helix’s work so well with lower gearing for whatever track speed you achieve, it will maintain it with great...

Sliding sheave bushing For latest maintenance parts, check the information below the two pictures.Primary Clutch Maintenance parts - Measure your parts to see if within wear specs and change parts if needed. Maintenance kit for drive pulley (buy from local skidoo...

HPV & LPV - 27 When you have the Roller secondary apart, apply your favourite "Brake Kleen Solvent" to get the rollers moving freely. Axle wear - Remove the rollers from the axles, checking for abnormal wear on the axles “shiny spots that don’t look symmetrical...

Mods & ImprovementWhen you observe fluctuating rpms; 1) high rpms on road and low rpms in the snow, or 2) Correct rpms for moments at full throttle but watch the rpms diminish, then ( and i know it is not pleasant to measure ) you must check all bushings to see if...

Ramp profile "Controls the size/magnitude of the shift force" Lower angle will provide more shift force. Thinner ramp allows the tra lever center of gravity to be farther away from the clutch shaft centerline - Provide more shift force. Higher angle will provide less...

Belt - 800 belt on a 600/500SS - Don't do it. Question) I hear about putting an 800 belt on my 500SS, will it last longer? Answer) Don't put an 800 belt on a 600 clutch. An 800 primary has a forged sheave. The 600/500SS is a cast sheave. The 800 belt is a harder...

RPMS Rpms - Peak rpms get lower as day goes on (summit) Question) (04 800 rev, 9000', dynamo Joe clutch kit) I have noticed (only in powder) as the day progresses that my peak RPM's get lower and lower and lower, I have dropped almost ALL pin weight (down to the last...

The Freeride itself vs. a softer suspension sled (X, Adrenaline, SP...etc) models are a substantive difference in suspension calibration - The FR being a "stiff suspension sled" vs. a non-FR, "softer suspension" sled. The Freeride to which the foundation of its design...

Engine Management   Comprises the management of engineered activities; fuel delivery, air/pressure, coolant, acutation(exhaust controls), occurrences analysis/recording/reporting(gages) Rave Check Valves Events - (Engine will reach maximum rpm only for a moment)...

This the information I have compiled about the 600 SDI “the dreaded bog” that is observed on many 600SDI. Many thanks to the contributors.   Billy Howard) Couple Things to check if all else has failed while trouble shooting SDI’s. 99% of these are absolutely...

Joe's Favorite Clicker NOTE; if wanting longer original BRP clicker bolts (calibration screws) order BRP #417223197 (2010 xp 800 screw) is about 3 threads longer than previous year models. Mots Machining phone number 780-418-5595 .Clicker - It seems that running a...