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Push rod length
Posted: Mon Jan 23, 2023 2:09 pm
by THEFORTHSTOOGE
1960 R50 fiche shows length to be 24.35mm, all 4 of mine are 24mm end to end. Why are mine shorter.
I'm changing out a damaged one.
Re: Push rod length
Posted: Mon Jan 23, 2023 2:18 pm
by schrader7032
BMW Salis fiche shows the length to be 24cm:
https://bmwclassicmotorcycles.com/index ... -5455.html
What fiche are you using that shows 24.35cm?
Re: Push rod length
Posted: Mon Jan 23, 2023 3:07 pm
by Flx48
Salis lists as ~24cm
Max lists as 243.5mm
Perhaps Max measured a single pushrod and Salis measured a number of them, hence the tilde?
Best-
George
Re: Push rod length
Posted: Mon Jan 23, 2023 7:22 pm
by THEFORTHSTOOGE
Max BMW fiche is my source. Guess I'll replace them all and play dough the piston tops. Looking for .080 int and .100 ex. MIN. clearances
Re: Push rod length
Posted: Tue Jan 24, 2023 4:23 pm
by wa1nca
Found this 1965 tech bulletin in the library
they went to 243.5 mm to offset for a thicker base gasket if used:
Same part #
- 223.pdf
- (126.88 KiB) Downloaded 45 times
Re: Push rod length
Posted: Tue Jan 24, 2023 4:29 pm
by schrader7032
Interesting...I'm wondering who would go to the trouble of lowering the compression on an R50??
Maybe an R50S.
Re: Push rod length
Posted: Tue Jan 24, 2023 5:13 pm
by wa1nca
yes
Not R50-R60/2