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Are the frame and engine numbers the same on a 1957 Cub. It is a swingarm frame. The number on the one I looking to buy are:
Frame T2625
Engine T20 26858

Thanks

They are always the same no matter what year. T2625 is a 1954 and T26858 is a 1957. Most title states go be the frame number.

Could a 54 plunger be converted to a swingarm frame.

The frame and engine number should match. That may be a frame part number, are you have the stamped frame number?


Bill B...

Yes that number is stamped.

26276 - 35846 are the 1957 Cub numbers. I am thinking that your frame number is actually matching the engine, but perhaps its hard to read, as they can be. The headstock number is usually F4221 which can be stamped or more usually cast in.

It is possible to convert to a swingarm, the rear section bolts on. Not sure of the exact fit, but nothing a good welder and some oxy heat couldn't fix if it was needed.
But you would need to show us clear photo's of the frame and engine number...to see if we think they are genuine factory stamped?

Thanks guys for your help. I pick up the Cub Sunday. So I will have more info and photos.

I'm not sure that a plunger frame is bolted?
Without going to my garage, I am pretty sure it's welded/ brazed?

A plunger frame is worth a lot more than a swing arm one

I messed that one up, result of running a high temp and some dreaded lurgy...sorry. Getting off before I do it again

My bad after getting it home and cleaning the frame and getting a better look the numbers are the same.

Thanks for all your help probably need more help when I start the restoration. Got to get my 69 T100R done first.

Result! It will make a lovely little 'bike