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Search found 796 matches

by malmac
Sun Dec 09, 2018 3:10 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Mystery BMW tool
Replies: 11
Views: 2964

i had one of these tools

On my R1100GS there was one of these tools. It acted as a handle extension for a flat tool - can't exactly remember what that part of the tool did but the part you have is a handle. I think it might have been a "C" spanner for the rear shock adjustment --- maybe.

Mal
by malmac
Tue Dec 04, 2018 2:20 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: brake drum diameter for R50/2
Replies: 4
Views: 1299

Thinking this through for my own ends

The hub/brake lining is quite a solid piece of material. I have no doubt it is possible to distort the braking surface by how the rim is laced to the hub. Perhaps if one is trying to correct a damaged rim by pulling it straight then the likelihood of distortion to the hub is greatly increased. On th...
by malmac
Mon Nov 26, 2018 6:06 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Handlebars too wide?
Replies: 17
Views: 4585

The distance from controls to bend

When I look at the pictures it seems there is a substantial distance between the handlebar controls and the bend in the bars. The distance looks unfamiliar to me. Don't know about the numbers. I have the so called flat bars with the bar end indicators and mine measure 30 inches. Be interesting to se...
by malmac
Fri Nov 16, 2018 1:46 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R67 Timing
Replies: 3
Views: 1075

Octane of fuel in that period?

Klaus


maybe the fuel was of a lower octane rating so the timing needed to be more retarded.

Also what is the compression ratio on the R67 as that might also be the deciding factor.
I think low compression ratio might require more retarded timing. Not sure but maybe.

Mal
by malmac
Sun Nov 11, 2018 2:29 am
Forum: Vintage (1948-1969) Motorcycles
Topic: No more cruise control...
Replies: 4
Views: 1004

This is my comprehension of the matter - but may not be correct

When I look down the throat of a carby - I see 1. The slide height set screw - the one that sets the bottom position on the slide. 2. A very small hole vertically above the idle air/mixture screw. 3. The central brass hole where theneedle enters. 4. A largish hole (about 6mm) which looks like the ve...
by malmac
Sun Nov 04, 2018 2:52 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Non-stock front swing arm seal removal
Replies: 5
Views: 1503

well there is good news

Unlike your rear crank bearing there is no chance this bearing has fusion welded its self to the rear swing arm. So some good news. Step i - remove the grease seal. These bearing should be taper roller bearings. So the inner race should come out with the grease seal. Screw driver or slide hammer sho...
by malmac
Wed Oct 31, 2018 3:19 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Rear Main Bearing Removal
Replies: 8
Views: 2108

Fusion welding

If the bearing spins on the crankshaft until it gets red hot it can fusion weld onto the crank. However that involves a lot of heat so you should be able to determine if that has happened because of heat discolouration. First Option While the crank and the bearing are both steel alloys, if you apply...
by malmac
Tue Oct 30, 2018 3:21 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: The missing part for the Denfield Seat
Replies: 2
Views: 675

thank you for the information

Thanks


Now where has that part disappeared too?



Mal
by malmac
Tue Oct 30, 2018 5:47 am
Forum: Vintage (1948-1969) Motorcycles
Topic: The missing part for the Denfield Seat
Replies: 2
Views: 675

The missing part for the Denfield Seat

I have a Denfield solo seat for my bike.

In this image, is the inserted part shown as a photo rather than a diagram, the missing part I need?

Thanks for your help.


Mal

by malmac
Tue Oct 30, 2018 4:12 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Rear Main Bearing Removal
Replies: 8
Views: 2108

Here is the puller I manufactured

Unless you happen to live in Australia this wont help much (as if you did I could lend you this tool). This tool is loosely based on the Matra tool for removal of the rear crank bearing. The bikes might be simple in one way, but really to do the work properly, a range of special tools makles a lot o...