Sporty Chews Up Shifter Drums! - Harley Davidson Forums

Go Back   Harley Davidson Forums > Harley Davidson Motorcycles > Sportster Models
Log In 

Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
Sponsored by: Rush Racing Products

Sporty Chews Up Shifter Drums!

Thread Tools Search this Thread
Old 03-28-2010, 10:30 PM
New Member
Join Date: Mar 2010
Location: NW Ohio
Posts: 39
Default Sporty Chews Up Shifter Drums!

I was wondering if anyone had any suggestions to this problem. I have torn the transmission out a few times now and replaced the shifter drum twice and shifter forks once. After installing the new drum it shifts like a dream, then after about 75-100 miles it starts downshifting hard. It then really becomes difficult to shift in general. The shifter drum begins to burr in the channels and the shifter forks then cannot slide on it. Has anyone run into this before and what should I look at? I was considering tearing it apart again, replacing bearings, and checking tolerances. If you have something specific to look for that would help. Thanks.
Reply With Quote
Old 07-07-2010, 01:55 PM
New Member
Join Date: Mar 2010
Location: NW Ohio
Posts: 39

Anybody have an idea?
Reply With Quote
Old 07-08-2010, 03:31 AM
parts eeter parts eeter is offline
Outstanding HDF Member
Join Date: Aug 2009
Location: NC
Posts: 2,932
Default mainshaft bearings

Sounds like a problem in the output shaft bearings or the primary shaft bearings. Replace them next time its apart and look for funky wear patterns on the gearsets indicating this. Use quality synthetic oil. Hope that helps.
Reply With Quote
Old 07-08-2010, 08:37 AM
Brett001 Brett001 is offline
Road Captain
Join Date: May 2010
Posts: 606

This does not seem to be a problem for most bikes, so something is likely bent, or a bearing is worn out.

The only sure way to fix it is to check everything in the transmission.

Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
3rd 4th chattering RidemyEVO Evo Classic Models 18 04-16-2015 09:17 AM
Jims 6 speed overdrive Transmission problem Yellowfxr4 Dyna Glide Models 1 07-06-2013 05:10 PM
5 speed trany help needed ladman0311 Evo Classic Models 6 03-26-2012 04:01 PM
Jumps out of gear? DAYTONCHOPPERS Primary/Transmission/Driveline/Clutch 2 07-19-2011 09:32 AM
Sportster Clutch Hub / Shell Slop 95_S2 Primary/Transmission/Driveline/Clutch 0 06-14-2008 09:09 PM

drum, problem, shift, shifter, sportster

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -5. The time now is 12:21 PM.