Features & Benefits:
* Clutches with 20 percent oversize rollers
* Idler gears manufactured from cold-headed steel
* Supplied with a 10/32 threaded output shaft, and a conversion bolt for the earlier 1/4-20 threaded output shafts allows fitment to cover all Big Twins from 1989 thru 2005
* Replaces OEM # 31553-90B
* Replaces OEM # 31553-94C
Tech Tip:
* Does Not Fit Dyna 2006.
* Advanced timing, High Compression, & Increased cubic capacity c an cause failure of Ring Gear, Pinion Gear teeth & Starter Clutch.
* S&S Easy Start Cams are the most reliable option for decreasing compression during start-up on Twin Cam Engines. Electronic or Manual compression releases are options for Evo Engines.
