I think the 52388 series engines were used in early 70s. I know my 70 Rupp engine was 55282C. In 1972, Rupp used 55387C on their non-lighted bikes that used the HS40 -- I would think it was in the same timeframe.
Some pics would help pinpoint the year. How long is the crankshaft? Does it have a lighting coil?
Some pics would help pinpoint the year. How long is the crankshaft? Does it have a lighting coil?
Last edited:
Pretty sure MTD was utilizing the longshaft, but I not sure if they used a ball bearing. Think Speedway used the longshafts too. It SHOULD have been a standard thing with a TC, but cheapskate Bird Manufacturing didn't bother with them on the TC angled engine bike I had that they made (jcpenney sold Digger).
And the 55388 was a number Rupp used, I checked my numbers and I had one on this Roadster2 I had 2 years ago (it had the optional Dell and open header on it and was a really nice runner!)
I am starting a rebuild on one of those too, Have to do a block replacement though.....bad cylinder bore so had to scrap the block :cursing:
And the 55388 was a number Rupp used, I checked my numbers and I had one on this Roadster2 I had 2 years ago (it had the optional Dell and open header on it and was a really nice runner!)
I am starting a rebuild on one of those too, Have to do a block replacement though.....bad cylinder bore so had to scrap the block :cursing:
Last edited:
