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oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101

hi, i find BMW R51 year 1938
i look is all ok
i have
- engine number in left side nr. 503271 without bmw stamp ??
-frame number in right rear side nr. 505506 ??
-carburator number bing nr. 1/22/62

also i find in top side engine mark ALBR ?

i find some bmw r69s with mark in to the frame B230 ??

attach is all fotos
please help me is correct or not

regards, mec

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avi
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israel
Joined: 01/08/2014
Posts: 108
Number is not original!It

Number is not original!
It use to be on the right side
like this.

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oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101
hi,thanks and which engine

hi,thanks Smile

and which engine like r51 have engine number in left side ?

i find another engine hause like R5 or R51 also number in left side which model is then realy ?

regards,Mec

avi
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israel
Joined: 01/08/2014
Posts: 108
R5 is the same like R51 ,also

R5 is the same like R51 ,also on the right side.
Send some more photos.

oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101
R51 engine foto

hi
today i again check and make more fotos
i look and all ok
frame is R51 1938
Engine is R51 1938 but owner change engine house and put number to wrong side , i must change mark number to right side like original
cylinder,heads is all original

motor start ,run ,drive wery good

regards,Mec

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oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101
bmw 51 1938 CLEANING

HI GUYS
I change all oils , clean carburators,make inspections ,and make beautiful ride
all is ok after 20 years , only foot gear is difficult to move 1,0,2...

is something must adjust for better shifting ?

regards,mec

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oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101
hi, Aviyes i see , the

hi, Avi
yes i see , the another engine housing is from BMW R51/2 then is number correct in Left side

i check oil in gearbox and inside is like sae 90 (oil for rear drivetrain), i change with motor oil (llike write in to manuals) and now is shift much better
bike work nice and i drive aline road in to 1611 m (ASL) , i must only change spark plugs Smile in to 2/3 roadtrip

thanks for help
regards,Mec

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oldtimers.si
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slovenia
Joined: 08/18/2014
Posts: 101
BMW R51 front fork

hi,
today i change oil seal in front fork from BMW R51

front fork is leak oil
front fork is not like new . its little rusted ..yeah its 80 years old Smile Smiling

i hope is now better
how much oil is ok ?
and oil number ?

regards,mec

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