Hi guys have been looking for the seal number used in the tacho drive housing upgrade, can't access some of the technical links that I have listed.
Bike # 2 has a seal and an O ring set into the shaft, can use that if necessary for bike #1 but the little clevis at the top of the shaft is badly worn on one side.
need to adapt Bike #1 properly
Thanks and regards Mike

My file says:

Honda seal #91207-222-000

Norton Tach

i have those seals, but would probably cost more to ship than the seal is worth,

Hi guys thanks for the seal no., will check it out tomoprrow.
In the meantime here is the mod I found in Bike #2 , bush in the bottom with an O ring set into the drive shaft, and the mod I did using 2 x 108 O rings
Have tested mine and it seems to work so far.
Thanks for the replies
Regards Mike

I put an extra o-ring in mine (no machining) as a temporary fix the second week I had the bike and it is still not leaking almost 40 years later. Kept saying one of these days I'll send it off to be fixed properly!

hi Steve, checked that out as well, although no leaks from the barrel/case joint.
symptom was easy to spot when riding as a fine slow flow up through the tacho cable hex nut , anyhow problem seems fixed now,7/16" ( 11.5MM) drill bit and 2 x #108 (little fat f@#@#kers) in the hole on the shaft , packed above the O'rings with grease, test ride yesterday proved it is sorted.
Like the idea of the O ring set into the shaft as on Bike #2, but think who ever did the mod, machined the groove way deeper than need be, as there are some very small low profile O rings available
Regards Mike

Drive housing with oil seal available under part #06-7254, seal only under #06-7255 from Andover Norton or from one of our distributors. In fact, if a customer orders the drive housing under one of the old numbers these days he automatically gets #06-7254 from us.
Joe/Andover Norton

ZFD wrote:Drive housing with oil seal available under part #06-7254, seal only under #06-7255 from Andover Norton or from one of our distributors. In fact, if a customer orders the drive housing under one of the old numbers these days he automatically gets #06-7254 from us.
Joe/Andover Norton

I assume (there's that word again) that the old housing can be drilled out for the seal?

Russ

Thanks Joe, any chance of a pic so I can see the seal?
Regards Mike

ZFD wrote:Drive housing with oil seal available under part #06-7254, seal only under #06-7255 from Andover Norton or from one of our distributors. In fact, if a customer orders the drive housing under one of the old numbers these days he automatically gets #06-7254 from us.
Joe/Andover Norton

I am not seeing these part numbers come up on the website.

Mea Culpa! Forgot to put them on at the time- they are now up. The oil seal 06-7255 is nothing spectacular, just an oil seal. Don't have a photo right now, but at 1.35 Pounds Sterling it is not exactly costly.
All old housings can be machined to accept the oil seal.
Joe Seifert/Andover Norton