Search found 7362 matches

by schrader7032
Sat Apr 10, 2021 10:38 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

Ah...nice work. That plunger is stuck in its position and lets gas through. Definitely soak it some more...maybe even use a penetrant like AeroKroil, PB Blaster...heck even WD40 to help dissolve and loosen things up. Then back to the regular soaking/cleaning bath and blow things out.
by schrader7032
Sat Apr 10, 2021 10:14 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3 - can't kill the engine...
Replies: 2
Views: 67

Re: R51/3 - can't kill the engine...

The key is supposed to ground (or unground...I can't remember which) the coil and stop the engine when pulled. I've experienced this a little on my R69S. I suspect there's something wrong with the circuit board or key mechanism in the headlight shell. What I've been doing to kill the engine is whack...
by schrader7032
Sat Apr 10, 2021 10:12 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

The debris would come from the tank, either the lining is deteriorating or something slipped in with the last time the tank was filled. Usually though with intermittent debris, just the incoming fuel tends to flood the debris away. It's a simple thing...the float is supposed to rise high enough so t...
by schrader7032
Sat Apr 10, 2021 9:16 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

Yes, the rod should turn...there's a small bore running through the center of the float which allows the rod through. Be sure that the float is snicked into the detent slot on the rod...if both floats are at the same height on the rod, then that isn't the problem. But something is keeping the float ...
by schrader7032
Sat Apr 10, 2021 8:55 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

Certainly if they bubble air while under water, that's not good! :D
by schrader7032
Sat Apr 10, 2021 7:06 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

Well you said you took the carb apart to clean it. So, take it apart enough to open up the float bowl and pull out the float. Give it a shake...do you hear fluid inside the float? If you have fuel flowing out the idle air screw, then the float is not sealing off the inflow of fuel. If the float is n...
by schrader7032
Sat Apr 10, 2021 6:38 am
Forum: Vintage (1948-1969) Motorcycles
Topic: R51/3-carbs leakage and tuning issues
Replies: 12
Views: 137

Re: R51/3-carbs leakage and tuning issues

Do the carbs have brass floats? Has one of them cracked and is now sinking, causing continuous flow of gasoline?
by schrader7032
Wed Apr 07, 2021 7:25 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: New guy w/ 1959 R50, knows nothing, tons of questions
Replies: 14
Views: 524

Re: New guy w/ 1959 R50, knows nothing, tons of questions

You got an "F"...is that for fail? :lol: The likely issue is that the picture images are too big. Windows has a built-in program called Paint that can resize images. I'm sure Macs have the same kind of utility.
by schrader7032
Wed Apr 07, 2021 12:29 pm
Forum: Vintage (1948-1969) Motorcycles
Topic: 1969 R69US
Replies: 5
Views: 129

Re: 1969 R69US

The fiche says it is an M8x25 stud-bolt...the 25 means it's about an inch long. It appears that the internal threads have let loose, likely they have stripped the aluminum. You can try and unscrew the stud-bolt and assess what comes out. If you see slivers of aluminum on the threads, that means it's...
by schrader7032
Wed Apr 07, 2021 11:55 am
Forum: Vintage (1948-1969) Motorcycles
Topic: 1969 R69US
Replies: 5
Views: 129

Re: 1969 R69US

Welcome to the forum! Can you point to something on this fiche that is the problem?

https://www.realoem.com/bmw/enUS/partgr ... g=31&sg=42

Or maybe you can upload a picture of the specific bolt.