MCB Performance - MCB Clutching

Ski Doo TRA history 101 -TRA original cast sheaves straight levers small splaine narr belt -TRA 2 cast cheaves curved levers large spline -TRA 3 = REV forged sheaves 1-1/2" wide belt -TRA 4 = 1200 Four Stroke forged poor reliability and perf. -E-DRIVE = 1200 Four Stroke 2011 and later -TRA 5 = HD for Mach Z 1000 tapered shaft/gov cup good -TRA 6 = never existed, Ski Doo skipped over it -TRA 7 = XP 2008-current (excluding 850) scalloped lighter -P-drive 2017 and newer 850cc -Cushion drive refers to the cushion dampener that exist on all twins since mid to late 90's. Cushion drive significantly reduces wear on the splines (early design) and all the ramps, rollers, pucks and, o-rings.