Search found 87 matches

by Captonzap
Thu Sep 03, 2020 9:02 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Air tubes for 1959 R60
Replies: 9
Views: 637

Re: Air tubes for 1959 R60

Go for it. A normal chrome plating job consists of a copper base coat, polished to desired shine, a nickel middle coat to seal the copper, and a chrome flash to make it all shine. If the under two coats are not done correctly, there are hairline cracks that allow moisture to get to the parent metal....
by Captonzap
Mon Aug 31, 2020 8:57 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Retouch or repaint?
Replies: 275
Views: 14563

Re: Retouch or repaint?

Wada ya know!

It's been a long while since I've seen a wiffle shield.
You just decreased your top speed by 2 MPH.
And it will be interesting to find out which key it "sings" in. :lol:

CZ
by Captonzap
Tue Jul 21, 2020 7:45 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Guidance
Replies: 20
Views: 2163

Re: Guidance

And you also don't want to cut the carb cables, since you may end up having to have them replicated and they will be used used as the pattern.
by Captonzap
Tue Jul 21, 2020 12:21 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R26, 1958
Replies: 6
Views: 956

Re: R26, 1958

Balancing of single cylinder engine is usually done using a percentage of the reciprocating weight mounted on the crank pin, and balanced that way. The percentage is based on experience, read 'trial and error', and varies depending on what RPM you want the smoothest operation. Fifty to sixty five pe...
by Captonzap
Sun Jul 05, 2020 9:23 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Bike wobble due to grooves in freeway
Replies: 15
Views: 2206

Re: Bike wobble due to grooves in freeway

I had the same problem on my R51/3. While renewing the front tire, I checked the bearings, and they were a little loose. New bearings cured the problem.
by Captonzap
Mon Jun 01, 2020 8:37 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Oil leak at cylinder base
Replies: 18
Views: 1209

Since it sounds like the hole

Since it sounds like the hole is below the compression area of the cylinder, the most pressure differential you can have is crankcase pressure and ambient. Harley Ableson used to coat the inside of their crank cases to keep them from seeping oil, due to the porous castings. In this day of modern pla...
by Captonzap
Sun Apr 26, 2020 9:47 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Carb Overhaul
Replies: 6
Views: 428

Over night soak

in lacquer thinner will soften the deposits. A small bristle brush will do the rest.
Compressed air at a high pressure will clean out the orifices, unless they are really plugged.

CZ
by Captonzap
Thu Apr 23, 2020 8:48 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: let the games begin - R69s engine rebuild
Replies: 58
Views: 4693

Out of curiousity

It looks as though the taps are tapered for a part of their length, and then straight. If so, how did you turn them? Or is the root diameter the same full length, and just the thread form truncated? A total length taper could be done with an offset tail center. CNC machine? Inquiring minds want to k...
by Captonzap
Mon Apr 06, 2020 10:05 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Retouch or repaint?
Replies: 275
Views: 14563

Rubber lube

If anyone has any suggestions as to something you might treat the gasket with to prolong life, I’d be interested. Chris Back in the day, we used brake fluid, DOT 3 since that was all there was, to lube the rubber parts on automobiles that were exposed to the elements. It didn't hurt the rubber parts...
by Captonzap
Wed Mar 11, 2020 8:14 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3 - rear crankshaft main bearing color change
Replies: 7
Views: 385

another trick

Thank you.
The freezer tip is well known over here :H


That takes care of the cold, so next time you use the hotplate to heat a bearing, place a few drops of oil on the bearing, and when it starts to smoke, it is about 450 far,+/-. That is not hot enough to change the temper in the races.

CZ