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Reply to "Sunset PRR J1 gearbox failure - NWSL gearbox now installed"

Ed,

Wish I could say conclusively, but I can't.  First thing I'd look for is backlash.  Too much back & forth play in the motor or gearbox, maybe both, can cause what you're describing.  Thrust washers (I get them from NWSL) might help.  The factory KTM gearboxes have plastic thrust washers that I typically toss.  Eliminating the backlash from the gearbox should help eliminating it from both is better.  Easy to say but the motor, depending on what you have, may be a little more difficult.  If there is a torque arm back sure it's stabilizing the gearbox properly.  I've observed, the Westside gearbox, on many of the later models, is a knockoff of the KTM and may not be quite as good.  One last thing, if the coupling between the motor and input shaft to the gearbox has to much play, or is worn out, you might see the issues described.  Bottom line, think of it as "Blue Printing" a motor for your hot rod...get everything as perfect as you can.

Matt & I try to help each other out.  Great respect for him, and his talents.

Jay

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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