1979 GS750L Cam Chain Tentioner Push Rod Length

[Guest]

Trying to understand why two tensioners for the same bike could have different length push rods.

The one which came with the project bike is 3 1/2 inches long while the one which came with Ebay replacement jugs is 3 3/4 inches long. Both jugs are embossed with 748cc. (748cc & 748cm3)

the cut out parts (tooth pics) are also different 7/8 versus 1 1/8 inches long.

any ideas would be appreciated!

[78550GS]

Maybe one is 8 valve and one is for a 16 valve?

[tom203]

Maybe rear camchain guide was changed or maybe engine casting was beefed up in tensioner's mounting point.

[Triton]

Anyone else? Trying to decide which to use?

anyone have one on the bench they can measure?

thanks