TWIN CAM Troubles
It looks like the TC engines are having problems again in the cam
shaft area. There are documented problems where the cam bearing
support plate and cam bearings fail. This is occurs on stock bikes
and modified bikes. When the problem occurs, it can result in
catastrophic failure of the cams, cam bearings, cam support plate,
cam chain tensioners, blown oil pump and lifters. The fix
is very expensive, a failure is even more expensive.
If you have an aftermarket cam shafts, most Harley-Davidson
Dealers are not covering this under warranty. There are two repair
kits from Harley-Davidson that contain the parts to fix this
Fuel injected models require part number 24984-99.
Carburetor models require part number 24985-99.
There is an extensive list of components is this repair kit
including camshafts, cam bearings, cam bearing support plate, cam
sprocket, cam chain, cam tensioner, oil pump, hydraulic lifters and
A complete description of this problem was published in the
December 2000 American Iron Magazine page 28.
Harley-Davidson Service Bulletin M-1100 "Cam Bearing Repair
Kits" issued July 10, 2000 defines the problem and repair.