Search found 82 matches

by Max Headroom
Mon Dec 06, 2010 2:00 am
Forum: Post 1970 Airheads
Topic: Types and sources for tranny bearings
Replies: 13
Views: 3214

Re: Types and sources for tranny bearings

The front input shaft bearing is now getting expensive. There is an alternative which is just as capable as the original, and also allows a standard 25 x 40mm front seal to be used instead of the factory 26.5 x 40mm seal. I can give you details if you're interested. I used an aftermarket Viton fron...
by Max Headroom
Fri Dec 03, 2010 6:27 pm
Forum: Post 1970 Airheads
Topic: Types and sources for tranny bearings
Replies: 13
Views: 3214

Re: Types and sources for tranny bearings

There's not lot of difference in quality between the major brands, in spite of what their advertising may try to suggest. Any reputable brand is going to give good service and will conform to ISO specs for dimensional integrity and load capacity. Having said that, I have a personal preference for th...
by Max Headroom
Sat Nov 20, 2010 3:32 am
Forum: Post 1970 Airheads
Topic: Steering head bearing rant.
Replies: 24
Views: 5488

Re: Steering head bearing rant.

Churchill once said that democracy was the worst form of government, apart from the alternatives . . . IMO, rolling element bearings are not ideal for a steering head environment at all. Rolling element bearings are best in applications where they rotate through 360 degrees at a constant speed with ...
by Max Headroom
Thu Nov 11, 2010 7:47 pm
Forum: Post 1970 Airheads
Topic: Handle bar M/C size for 40MM ATE brakes
Replies: 10
Views: 3061

Re: Handle bar M/C size for 40MM ATE brakes

I am currently playing with a '75 R90/6. I'm thinking of going to a handlebar master cylinder. Is there any consensus on what size Mastercylinder to use with the 40mm ATE brakes Motobins seem to stock a variety of sizes from 12mm to 16mm Thanks Charles Chas, I used a 13mm h/b unit for my bike. It h...
by Max Headroom
Tue Oct 26, 2010 7:45 pm
Forum: Post 1970 Airheads
Topic: PAINT OR POWER COAT FRAME
Replies: 9
Views: 3926

Re: PAINT OR POWER COAT FRAME

Ahh, but i didn't mention the BRAND of the primer . . . .

I'll let ya know when the paint falls off the frame though.
by Max Headroom
Tue Oct 26, 2010 3:06 pm
Forum: Post 1970 Airheads
Topic: PAINT OR POWER COAT FRAME
Replies: 9
Views: 3926

Re: PAINT OR POWER COAT FRAME

I would also challenge the writer's view of the smooth version of Hammerite - surprisingly enough called Smoothrite . . . Preparation is just as important with this product as it is for any other surface coating. I used it on my R90S frame, swingarm, battery box, and headlight bucket, and five years...
by Max Headroom
Mon Oct 25, 2010 7:17 pm
Forum: Post 1970 Airheads
Topic: R60 to R75 barrels.
Replies: 8
Views: 2803

Re: R60 to R75 barrels.

I recently did an R60/5 - 750cc conversion for a guy. He's owned the R60/5 for 30 years, (bought it in the USA on an extended trip as it happens) and he had assumed that the 26,000mi on the speedo was original when purchased. When the bike began using lots of oil recently at 46,000mi, he pulled the ...
by Max Headroom
Mon Oct 18, 2010 9:47 pm
Forum: Motorcycling
Topic: Gut feeling or "60 horses and a duplex front brake"
Replies: 27
Views: 7204

Re: Gut feeling or "60 horses and a duplex front brake"

FWIW Stephen, since you've asked for suggestions I'd go for either the 750 or 900 top end, but with the 308 cam instead of the 336. The 336 works best when the compression is bumped right up, but offers little in return on standard compression unless you're keen to rev the crap out of the bike to fi...
by Max Headroom
Wed Oct 13, 2010 4:45 am
Forum: Post 1970 Airheads
Topic: 1975 R90 Brake Caliper Size
Replies: 17
Views: 5092

Re: 1975 R90 Brake Caliper Size

And would that make it completely unremarkable? :? It's remarkable how markedly less marked it is now: Why, mark my words, I would pay many marks for such beautiful work. I doubt the Bismark had markedly better technology. There's a casting on my friend Mark's Numark turntable somewhat similar, but...
by Max Headroom
Mon Oct 11, 2010 8:43 pm
Forum: Post 1970 Airheads
Topic: 1975 R90 Brake Caliper Size
Replies: 17
Views: 5092

Re: 1975 R90 Brake Caliper Size

Major Softie wrote:
melville wrote:Well, my 12/74 (1975 model year) /6 has drilled disc and 38mm. Caliper unmarked when I got it as to size, even less marked now.
Is your unmarked caliper markedly less marked now?


:mrgreen:
And would that make it completely unremarkable? :?