Sliding sheave bushing
Spring cover bushing
Sliding sheave bushing observation
Lever roller
Lever pins observation
Crank taper runout
2012 Primary clutch/crank alignment

Check Frame for cracks

Dial indicator video


Sliding sheave bushing
For latest maintenance parts, check the information below the two pictures.

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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 dealer)
1 spring cover assy, 3 rollers, 1 bushing, 6 slider shoes and o-rings, 1 circlip, 3 cotter pins & lever axles
2011~16, 800PT & Etec
BRP#415129626
@ $139.00

Maintenance kit for drive pulley (buy from local skidoo dealer)
1 spring cover assy, 3 rollers, 1 bushing, 6 slider shoes and o-rings, 1 circlip, 3 cotter pins & lever axles
2008~10, 800PT & Etec
BRP#415129627
@ $139.00

Maintenance kit for drive pulley (buy from local skidoo dealer)
1 spring cover assy, 3 rollers, 1 bushing, 6 slider shoes and o-rings, 1 circlip, 3 cotter pins & lever axles
2011~older, 600E-Tec High altitude and all 1200's
BRP#415129708
@ $139.00

Maintenance kit for drive pulley (buy from local skidoo dealer)
1 spring cover assy, 3 rollers, 1 bushing, 6 slider shoes and o-rings, 1 circlip, 3 cotter pins & lever axles
2011~2015 600 & 600E-Tec Sea level
BRP#415129624
@ $139.00


I only recommend the original BRP primary clutch rollers because they are 1) the original diameter and 2) they weigh 9 grams(TRA7) & 10.1 grams (TRA3).  The fact of the original smallest diameter is a benefit with a great degree towards the promotion of quick backshift and strong bottom end acceleration using the most of the meat of the engine's torque curve.
 
If your primary clutch wear parts are not that good of shape, then update to the latest BRP primary clutch spring cover and the sliding sheave bushing.
In the past, some of these covers have been too tight and almost bind on the fixed sheave.  Clean the burrs with emery cloth to facilitate an easier sliding fit of the cover over the fixed shaft.


 
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TRA-7 Sliding sheave bushing clearance
The latest bushing material update SCP-500 is durable and wear resistant, best bushing to date.  There are a few instances of "sticking" to where tight tolerances of the bushing to the fixed sheave when new.  The sled may reveal high or erratic rpms upon full throttle application then rpms drift back to normal.  The bushing clearance may be too tight. Hone bushing to clearance of .0025~.003" for smoothest clutch stroke action.

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Primary clutch Roller
NOTE - Weigh the rollers.  There have been differences in as much as 0.9g from one roller model to another.  Example, going from the 2008 TRA-7 roller to a stock replacement roller in the aftermarket, the aftermarket has been known to be 1.1g heavier.

Example - if you had 16 gram pinweight with the original BRP roller and bought these aftermarket rollers, then reduce the pinweight by 1 gram to have the equivalent overall roller and pin - weight.  Previously you got 8200 with 16g and oem roller.  Now you will need 15g to get 8200
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Binding of TRA lever pins
During break in period on TRA clutches it is possible for the mating surfaces of the clutch lever pins and bushings to collect build up debris from wearing system parts.  Debris has a sticky gum feel to it and prevent the lever from moving freely on the axle.
Excessive debris can reveal fluctuating rpms from erratic shift character.

Also possible for build-up to occur later on as parts wear with more use.
Clean foreign debris build-up and always verify TRA lever retainer bolts are torqued to proper specs.

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Crank Taper Runout
800R known for bad crankshaft wobble that contributes to excessive clutch wear and short belt life.
Get the clutch off the engine.
Get a dial indicator on the end of the crankshaft stub to check for crank end excessive runout. Crank taper may be out of spec and this will certainly cause excessive premature wear of new clutch components.

Put dial indicator 1/8 inch in from end of crank stub.
Maximum deflection PTO side is 0.06mm (.0024) engine type = ALL

I have had a customer who warantee a crank on an 08 and it took 4 crankshafts from BRP before a spec crank showed up - crank came in, checked runout,(.003+) sent it back   Nuther crank come in, again (.003+) sent it back, nuther crank come in (.0025) sent it back. 4th crank come in and (.002) The 4th crank came with less than out of spec runout.

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The best way to mount the dial indicator is to take the magnetic base or standard base and put it against the PTO cylinder.  With a ratchet strap, wrap the strap around the cylinders of the engine and crank down on the dial indicator base - this is so you have a solid mount to the engine itself.  With the stylus pointed down on the stub, dial as shown in the illustration.  With spark plugs out, can rotate the engine using the starter pull chord.  Zero in the scale and measure runout on crank.

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2012 Primary clutch/crank alignment

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The engine back stop can move out over a 1/4 inch.  The clutch alignment can be good at rest however under full load the torque would twist the engine out of parallel.

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Check Engine Mounts and E-Module for Cracks (engine-module)

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Check that support especially on 2008 and 2009

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 Dial indicator video (CLICK)

and

Dial indicator video #2

and

Dial indicator video #3

THANKS DON MEGA

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