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Search found 8190 matches

by schrader7032
Wed Nov 23, 2022 4:54 pm
Forum: Classic (1970-25 years ago) Motorcycles
Topic: Getting an r60/6 running after sitting for over 20 years
Replies: 19
Views: 397

Re: Getting an r60/6 running after sitting for over 20 years

I don't think the pan needs to dropped all that often. What I would add would be a number of rare earth magnets to the bottom of the steel pan. They will catch any bits of metallic items floating around. You should also use a magnetic drain plug. As for the pan bolts, most as I recall thread all the...
by schrader7032
Tue Nov 22, 2022 7:07 am
Forum: Vintage (1948-1969) Motorcycles
Topic: Idling and vibration R69 1956
Replies: 13
Views: 586

Re: Idling and vibration R69 1956

Only pull the spark plugs if you know that the magneto safety gaps are set properly. The gaps are there to allow the spark energy to find ground if something happens to the spark plugs or wiring. If the energy can't get to ground, damage to the coil can happen.
by schrader7032
Mon Nov 21, 2022 7:23 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Idling and vibration R69 1956
Replies: 13
Views: 586

Re: Idling and vibration R69 1956

General concept on "fixing" differential timing. Rotate the engine so the timing of the cylinder that is farthest out is in the timing window. Take the engine timing cover off. Sit on the right side of the bike. With a blunt point punch, put it against the bolt that holds the advance unit to the cam...
by schrader7032
Mon Nov 21, 2022 1:42 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: Idling and vibration R69 1956
Replies: 13
Views: 586

Re: Idling and vibration R69 1956

Welcome! Vibration like that could be due to not a good synch between the carburetors. Additionally you might have differential timing, meaning that one cylinder fires a little before the S-mark and the other cylinder fires on or after the S-mark. One can redo the timing so that you split the differ...
by schrader7032
Mon Nov 21, 2022 7:15 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3 exhaust crossover pipe with sump-bolt cut-away
Replies: 5
Views: 242

Re: R51/3 exhaust crossover pipe with sump-bolt cut-away

Check Vech's old website...thankfully it's still up for reference! Search for "18114090246.1 chrome exhaust crossover pipe with drain plug notch R5R71 R512 R513R68". The ".1" was his way of using the OEM part number but represents a "Vech-i-fied" part.
by schrader7032
Fri Nov 18, 2022 1:17 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R50S Restoration
Replies: 18
Views: 836

Re: R50S Restoration

I, too, have heard/read that from Duane. Seems to make logical sense.
by schrader7032
Wed Nov 16, 2022 8:24 am
Forum: The Incomparable BMW R90S
Topic: Not convinced it’s running right…
Replies: 49
Views: 4187

Re: Not convinced it’s running right…

I suppose it is hit or miss with the '74 transmissions, but it was the first year so one can understand the "growing pains". Snowbum discusses model differences on this page. There is a section about 1/4 the way down that discusses the /6 and he has a paragraph with his impression of the first 5-spe...
by schrader7032
Tue Nov 15, 2022 1:49 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S pistons
Replies: 13
Views: 931

Re: R69S pistons

The view if of the bottom third or skirt of the cylinder, right? I'm not sure, but how far down the bore does the piston actually travel?

Those marks suggest that there was lack of lubrication. But I don't have much experience with this type of thing.
by schrader7032
Mon Nov 14, 2022 2:00 pm
Forum: Classic (1970-25 years ago) Motorcycles
Topic: Muffler mounting R75/5
Replies: 21
Views: 825

Re: Muffler mounting R75/5

Compare you bike and muffler orientation with the ones from the page:

http://www.bmbikes.co.uk/photopages/photosr75-5.htm
by schrader7032
Mon Nov 14, 2022 6:12 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R69S pistons
Replies: 13
Views: 931

Re: R69s pistons

Looks like your pistons are dated more or less correct at 1/62, there should be additional info inside the piston that came from the mold. The nominal dimension should be 71.92mm so yours are twice over...I believe each oversize is 0.5mm in diameter. The triangular stamp is likely the inspection sam...