How to replace centrifugal clutch in 1986 JD amt and where can I purchase one new or used

You may Try Aliexpress or Alibaba. If not, May i know your location?

Question edited for clarity and all the typos :>D
Question moved to make / model category.

Clutch replacement. My guess is something not right.

https://www.google.com/search?q=1986+harley+davidson+sportster+883+replace+clutch+plates

Service manual

1986-03 Sportster XL XLH Service Manual

https://www.ratbikeservice.com > dwnld > 1986-03 ...
PDF
This detailed and comprehensive manual covers. 1986-2003 XL/XLH Sportster models. The text provides complete information on maintenance, tune-up, repair and.
638 pages

what transmission is there, AMT is reverse dead too?

that is a bad clutch or bad clutch slave cylinder connect to TCM..
ooohhhh,ahhhh it is not a manual box (as seen for 100 years
and now the AMT is an automated manual gear box
yes is manual in the guts but no out side.
there is some kind of automatic clutch to that that. no clutch pedal.
There is TCM that does all the shifting and clutching.
the cures are here.
1: check all fuses.
2: scan the PCM for DTC errors
3: get the car serviced in a shop.

Library sec629

Check all of your spindles to make sure no bearings are seized..also check all idler pulley bearings....good luck

Purchase a replacement seal kit at your local motorcycle parts store. You will also need to buy or borrow a pair of "circlip" pliers to disassemble and reassemble the slave cylinder (to remove and reinstall the retaining clip inside the cylinder). Make sure everything is SPOTLESS, and I mean surgically spotless, before installing new seals and reassembling. DO NOT use any tools to get the new seals on the piston, just your fingers, or you will be doing the job again soon. Soaking the new seals in clean brake fluid for a few hours before reassembly makes the job easier. It also helps to bench-bleed the slave cylinder before re-installing to make it easier to bleed when you get it back on the bike. The "circlip" pliers come in various shapes and sizes, but something basic like this should do just fine.

This uses a centrifugal clutch and it is not adjustable. If it is not engaging or slips replace the clutch drum

does it have a elec clutch.if so clutch is pulling to much power. replace clutch

it is possible. maybe u should have put a heavy duty clutch in. sounds like a work horse.