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Pre-unit Transmission Gaskets #463201
11/14/12 3:05 am
11/14/12 3:05 am
Joined: Apr 2006
Posts: 261
Kansas City
RGSDave Offline OP
BritBike Forum member
RGSDave  Offline OP
BritBike Forum member

Joined: Apr 2006
Posts: 261
Kansas City
Can anyone tell me, do I use the inner and outer gaskets like I've seen on eBay, or do I just use sealer? I have 4 of these transmissions and none of them have gaskets. If I should use gaskets, then with sealer or no sealer on the gaskets?

Thanks,
Dave

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Re: Pre-unit Transmission Gaskets [Re: RGSDave] #463236
11/14/12 11:26 am
11/14/12 11:26 am
Joined: Jan 2005
Posts: 1,667
East Bethany New York
Dick Harris Offline
BritBike Forum member
Dick Harris  Offline
BritBike Forum member

Joined: Jan 2005
Posts: 1,667
East Bethany New York
Morn'n RGDave,as long as nothing binds,I don't use gaskets,just sealer.I have seen transmissions that needed an inner gasket for clearance. Dick

Re: Pre-unit Transmission Gaskets [Re: RGSDave] #463238
11/14/12 11:30 am
11/14/12 11:30 am
Joined: Jan 2006
Posts: 2,022
Asheville, NC
Mike Baker Offline
BritBike Forum member
Mike Baker  Offline
BritBike Forum member

Joined: Jan 2006
Posts: 2,022
Asheville, NC
Dave-
I've only worked on unit motors, but I don't think the PU gearbox is mechanically much different.
I've put them together both ways, and can't really say that one is preferable. I always thought that the extra end float, "slop", whatever you want to call it, when gaskets were used would affect the way it works, but haven't found that to be true. I use gaskets now because its less messy than 3bond.
Mike

Re: Pre-unit Transmission Gaskets [Re: RGSDave] #463436
11/15/12 6:54 pm
11/15/12 6:54 pm
Joined: Jun 2007
Posts: 6,156
Maui Hawaii
HawaiianTiger Offline
BritBike Forum member
HawaiianTiger  Offline
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Joined: Jun 2007
Posts: 6,156
Maui Hawaii
No gaskets needed. You can machine a groove for an "o" ring for the shifter shaft, though, if you don't already have it. Somehow Triumph expected the rubber square sectioned do-dad on the kick start shaft to seal it there, but that was wishful thinking. A proper lipped seal can be used there with a little ingenuity.
Also, you can install a later and longer mainshaft bushing so that the leaks that normally come out of there while the bike is sitting on the side stand will drain into the primary.
Even with all that you can expect a drop oil gearbox oil here and there as normal.
Bill


Bikes
1974 Commando
1985 Honda Nighthawk 650
1957 Thunderbird/T110 "Flying Tiger"
Antique Fans: Loads of Emersons (Two six wingers) plus gyros and orbiters.
Re: Pre-unit Transmission Gaskets [Re: RGSDave] #463445
11/15/12 8:28 pm
11/15/12 8:28 pm
Joined: Aug 2001
Posts: 7,671
scotland
triton thrasher Offline
BritBike Forum member
triton thrasher  Offline
BritBike Forum member

Joined: Aug 2001
Posts: 7,671
scotland
If you're losing much oil through the kickstart shaft, gearchange shaft, or the sleeve gear bush, there's too much oil in there.


Amateur Loctite enthusiast.

Moderated by  John Healy 


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