Upgraded Roller Bearings Group Buy?

He'll answer that for sure....if it's a "65cc" I believe those are the bearing engines, if it's a "70cc" it's a bushed.

Now, I do know from experience with engines that a bushing is not always a bad thing, and sometimes it's a good thing.

In model planes, a bushing is lighter, cheaper, little or no maintenance needed.

Autos and trucks use a "bushed" bottom end for the most part because the surface area is bigger and can take more "abuse".

Both have advantages and disadvantages.

Anyone else care to add to this?

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If it ain't broke, and you mess with it long enough, it will be.

yes upper and lower bearing kits on all dax bicycle motors

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Even the ones with the black bike that are called 70's?

I thought the bearing motors were the "65's"?

Maybe I outta read the item description?

Still, I'll take either.

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If it ain't broke, and you mess with it long enough, it will be.

Yes both have advantages and disadvantages needle bearings when they go they take out your whole engine with them. The bushings will give warning before going. I think you get more power out of the bearings though.