oil leaking into clutch from gearbox

Dukepaul · Feb 17, 2021

Hi,

My clutch is slipping so I just stripped it and noticed there is a small amount of oil on the clutch plates (I am running a belt drive) this appears to coming from the gear box, I have recently done a complete rebuild including the gearbox, so would welcome any ideas where to look first?
Cheers

SteveC · Feb 17, 2021

Dave Comeau designed a seal for the clutch pullrod.
Available from Norvil in the UK. I fitted one and it works a treat.

Norvil Motorcycles - Product Photo

dynodave · Feb 17, 2021

info and install notes
ccrs and dealers
CCRS install
I will be fixing my web site today.
I will no longer be selling direct, unless for shop or club/group buy i.e 5 (or more) at a time.
Buy from one of my norton parts dealers.
finally sold over 6000... 95+% through dealers

jan nelder · Feb 17, 2021

dynodave said:
info and install notes
ccrs and dealers
CCRS install
I will be fixing my web site today.
I will no longer be selling direct, unless for shop or club/group buy i.e 5 (or more) at a time.
Buy from one of my norton parts dealers.
finally sold over 6000... 95+% through dealers

Norvil (UK) also sell a version for pre Commando AMC boxes, which incorporates a longer main shaft nut.

Dukepaul · Feb 17, 2021

Cheers guys I will get one ordered today

dynodave · Feb 17, 2021

jan nelder said:
Norvil (UK) also sell a version for pre Commando AMC boxes, which incorporates a longer main shaft nut.

Yes this is my product also. It was designed and made at the request of a guy in the north lakes district. They will likely not be made again once gone as the volume is so low and the 2 pieces are quite expensive to make. It would cost me thou$and$ to make another batch and I would surely be dead before they all sold.

dynodave · Feb 17, 2021

Dukepaul said:
Hi,

My clutch is slipping so I just stripped it and noticed there is a small amount of oil on the clutch plates (I am running a belt drive) this appears to coming from the gear box, I have recently done a complete rebuild including the gearbox, so would welcome any ideas where to look first?
Cheers

topic reviewed quite well here:
magic gear oil climbs!

ashman · Feb 17, 2021

Over filled gearbox will also cause that problem, I don't rely on the fill cube for the amount of oil, I use a messure cup and fill to the right fl oz the manual says to use, I found very early the cube for the level does over fill the GB, I also put grease on my clutch rod and since doing this I have had no more problems with GB oil getting into the primary case or clutch, so put the right amount of GB oil in while you wait for the clutch seal.

Ashley

Scout63 · Feb 17, 2021

Dukepaul said:
Hi,

My clutch is slipping so I just stripped it and noticed there is a small amount of oil on the clutch plates (I am running a belt drive) this appears to coming from the gear box, I have recently done a complete rebuild including the gearbox, so would welcome any ideas where to look first?
Cheers

Your Norton is just checking to see if you are paying attention. +1 for Dynodave’s pushrod seal. Installation was a snap.

maylar · Feb 18, 2021

dynodave said:
Buy from one of my norton parts dealers.
finally sold over 6000... 95+% through dealers

Got an email from British Cycle Supply back in September -

04-0373/A NUT, CLUTCH PUSHROD SEAL, NORTON COMMANDO

New batch of the famous DYNO DAVE Commando clutch nut with seal. Well tested design, in use since 1989. Very popular, 6000+ sold!

$27.33 USD

fiatfan · Feb 18, 2021

Does anyone know if the seal is available in the EU outside of the UK?

marinatlas · Feb 18, 2021

fiatfan said:
Does anyone know if the seal is available in the EU outside of the UK?

Try Holland Norton works

marinatlas · Feb 18, 2021

https://www.hollandnortonworks.eu/img.php?img=https://www.hollandnortonworks.eu/bestanden/artikelen/3/105_clutch_rod_seal(3).jpg?1554308082=

oil leaking into clutch from gearbox

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