1941-84
PROBLEMS:
- Clutch will not release - Check cable adjustment. Some
after-market cables stretch so you lose cable pull. Readjust cable
and leave some free play.
- Pressure plate not properly adjusted. Put the bike in neutral
and spin hub. Check for parallel alignment.
- Check all 10 clutch pins for notches. If so, plates will not
move freely.
- Pull on the outer basket to make sure its not loose, then spin
to make sure it spins freely and concentric.
- Check friction plates and look at the ten holes. Make sure
they are not egg shaped and steel plates for rolled over edges and
flatness.
If they are the anti-rattle type, check all rivets and make sure
small ball bearings do roll. If they appear to be loose, do not
reuse them. Replace with a type that do not have all those extra
pieces like our part, BTS-5. That is the last thing you want is
all those moving pieces floating around in there. If steels are
wrapped and blued, they should be replaced. Sometimes you could
bead blast and reuse.
- Check stack height. It should be 1.575. If kit is older, it
will be under, if under 1.500, should be replaced. Part BT-5.
Frictions and steels included.
- If plates appear to be glazed, sometimes for a quick fix you
can bead blast steel plates and on the friction plates rub a piece
of emery cloth or sand paper #220 grit to 400 in a circular motion
on a flat surface to remove high spots and glazed area. This is
very important to pre-soak plates even if you are running it dry.
Why, for the initial start up even though the bike is in neutral,
those plates are still rubbing against each other and will cause
them to reglaze again. Just scuffing is not good, what you want is
full contact area.
- Check and make sure all springs are evenly compressed and
adjusted.
- What should you presoak them in?
- ATF Type F. (No Dextron. Has slipping
adjacencies.)
- 20/50 motor oil - no synthetics.
- B&M trick shift works very well. Just stick
plates in a zip lock bag with oil for 10 - 15 minutes. Wipe off
excess and install.
- Usually inspect all moving parts very carefully and always
remember heat will destroy things.
Usually inspect all moving parts very carefully and always
remember heat will destroy things.
SLIPPING:
- Check the stack height 1.575 is new. Don't go below 1.500.
- Pressure plate adjustment for proper and even.
- Check all 10 springs for height.
- Glaze plates. See #7 for Quick Fix.
- 1941-84 replacement kit - friction plates and steels with a
pre-measured stack height BT-5 Performance Kit - Extra Plate Kit -
BTX-5 includes 6 frictions, 5 steels and 10 springs.
1984 1⁄2 - 1989
SLIPPING:
- Check cable adjustment. Since this is a two-piece cable,
adjustment is very easily lost.
- They went to a diaphragm spring which is one big spring and
there is a setting adjustment (a) being the softed. If it tends to
slip, move adjuster plate to (b) position if no better, move to
(c) that is the strongest position.
- Remove plates and check stack height. Should be .885 - .900
new. If under size, needs to be replaced with BT-9. Kit includes
frictions and steels.
IMPROPER ENGAGEMENT:
- Check friction plates for glazed area and steel plates for
flatness. This is very important. If frictions are glazed, and
steel are warped, and spring is on (c) adjustment, you should
replace frictions and steels included in kit BT-9 order.
90-97 BIG TWIN; 91 & LATER SPORT
SLIPPING:
- These bikes again have a two-piece cable so proper cable
adjustment is very important.
- Check steels and frictions for warpage and discolored steels.
If steels are discolored, it has reached very high heat and is
time to replace with BT-11 or BTX-11. Diaphragm spring could of
lost some tension if it slips at high RPM most likely its spring
tension replace with part #BT-15. If frictions are warped, replace
with part BT-11. frictions and steels or extra plate kit, BTX-11,
9 frictions and 8 steels. This is our performance kit.
Check your owners manual for minimum stack height. New fresh kit
is 1.275 to 1.290
|
