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J&P Cycles® Mainshaft Nut Kit

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  • J&P Cycles® Mainshaft Nut Kit
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37 Reviews

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J&P Part: 6200100


J&P Cycles® Mainshaft Nut Kit

• Unlike the other mainshaft nuts on the market, this nut is made of a higher grade steel

• Seal uses a readily available double-lip oil seal and has an o-ring installed in a recessed area on the back side of the nut

• For your convenience, also included is a mainshaft sprocket lockwasher in this kit

Important Product Notes

Product Specs

Kit: Yes

Sold in Units: Kit


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Harley-Davidson® Models

Disc Glide Willie G Special FXDG : 1983
Duo Glide FL : 1962–1964
Duo Glide FLF : 1962–1964
Duo Glide FLH : 1955–1964
Duo Glide FLHF : 1958–1964
E : 1936–1950
EL : 1936–1952
Electra Glide Anniversary FLH : 1978
Electra Glide Classic FLHC : 1979–1981
Electra Glide Classic Side Car FLHCE : 1979–1981
Electra Glide Fat Bob FLHFB : 1965–1970
Electra Glide FLB : 1965–1970
Electra Glide FLBF : 1970
Electra Glide FLFB : 1965–1969
Electra Glide FLH : 1965–1978, 1981
Electra Glide FLH-74 : 1980
Electra Glide FLH-80 : 1978–1980
Electra Glide FLHB : 1965–1970
Electra Glide FLHF : 1965–1975
Electra Glide Heritage FLH : 1981
Electra Glide Police FLHP : 1981
Electra Glide Police FLHP-74 : 1979–1980
Electra Glide Police FLHP-80 : 1979–1980
Electra Glide Police FLP : 1971–1972, 1974–1975
Electra Glide Police FLPF : 1971–1972
Electra Glide Sport FLHS : 1977, 1980–1981
ELF : 1952
ELP : 1949
ELS : 1951–1952
EP : 1949
ES : 1936–1950
F : 1942–1950
FL : 1941–1961
FLE : 1953–1956
FLEF : 1953–1956
FLF : 1952–1961
FP : 1949
FS : 1941–1950
Hydra Glide FLHF : 1955–1957
Hydra Glide FLS : 1951–1952
Low Rider FXS : 1977–1978, 1981–1982
Low Rider FXS-74 : 1979–1980
Low Rider FXS-80 : 1979–1980
Low Rider FXSB : 1983–1984
Softail Standard FXST : 1984
Sturgis Belt FXB : 1980–1982
Super Glide Electric Start FXE : 1974–1984
Super Glide Fat Bob FXEF : 1980–1984
Super Glide Fat Bob FXEF 74CI : 1979
Super Glide Fat Bob FXEF 80CI : 1979
Super Glide Kick Start FX : 1971–1978
Touring Electra Glide Classic FLHC : 1982
Touring Electra Glide FLH : 1982–1984
Touring Electra Glide Special Edition FLHX : 1984
Touring Electra Glide Sport FLHS : 1982–1983
U : 1937–1948
UH : 1937–1941
UHS : 1937–1941
UL : 1937–1948
ULH : 1937–1941
US : 1937–1948
Wide Glide FXWG : 1980–1984

Customer Reviews

Overall Rating:
4/5 based on 37 ratings

5 by

have just ordered this but read reviews and wonder about people who complained about stripped threads after torqued down. Torqued down? Why? What do you think the tab washer is for? Using this on a 5-6 speed or a 4sp that was made for?ILL see when it gets here and I use it and no I wont pull out my torque wrench that's setting in a corner drawing dust. Call me old school or whatever I use lock washer and blue lock thread. If that doesn't do it let it fall off.

5 by

Parts worked well ! Thank you !

2 by

Great idea, but poorly manufactured. Maybe I was just unlucky and got a defective one, but the flats of the nut were so irregularly machined that the socket would not fit over the nut. The nut did have six sides, but it was far from a regular hexagon. Had to send it back.

5 by

Perfect fit...Great Job

5 by

great updated parts

5 by

happy with it and will order again.

5 by


5 by

Have used this part for years with good results

5 by

Good Stuff Again

3 by

works well

0 by

As I torqued down to 100 lbs. the threads stripped out. Had to use the old nut that I had from 2000.

5 by

best in market

0 by

Threads striped out completely at 30 foot pounds of torque, HD Specs call for 150 foot pounds. Great idea, would have been nice if this product was made from the “HIGHER GRADE STEEL” as stated in the description, and not scrap metal from China. Total waste of money, if you put it on at 25 to 30 pounds; sooner (most likely) or later your drive sprocket will come off and then you can order a new transmission case and what ever else blows apart.

0 by

Threads stripped well before reaching factory torque specs. Need a lot of bearing grease to hold down the o-ring long enough to install.

5 by

great fitment. great product. works excellent

4 by


5 by

Works well to seal a problem leak, without having to swap out a notoriously difficult to change seal. Note: to preserve the integrity of the O-ring, make sure you tighten and torque the nut by hand instead of using an air or electric impact wrench. Otherwise the thin O-ring might bind in its shallow groove and would be pinched or cut if the nut spins too fast.

4 by

I like the idea of the seal made in the nut, but I had to shim my bearing support (open primary) to gain clearance.

5 by

Excellent product. Stopped my leak immediately.

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