Unstuffing a crankshaft for decreasing weight?

Daniel Kristensen /

Has anyone tried making the crankshaft more lightweight? How did you do it? Anything I must beware of? Should I measure the balance factor before disassembling the crank?

Re: Unstuffing a crankshaft for decreasing weight?

Terbo Speghetti /

If you're asking these questions, you're probably a few levels away from doing work on a crankshaft. There's really no room for error at all.

And "unstuffing" would be counterproductive, as it would increase volume in the crankcase and reduce compression. Which is the whole point of stuffy/full circle cranks in the first place

Re: Unstuffing a crankshaft for decreasing weight?

Daniel Kristensen /

Yeah I'm probably af few levels away from messing with that. I'm aware that the crankcase volume increases, but Im curious if it will make the engine rev faster besides the installed performance parts?

Re: Unstuffing a crankshaft for decreasing weight?

Dirty30 Dillon /

Any gain that would be made from unstuffing and lightening, would be lost by increasing crankcase volume, honestly.

Re: Unstuffing a crankshaft for decreasing weight?

Daniel Kristensen /

I see. Thanks for "warning" me, was about to take a new Swiing 44ΓΈ hub crank apart and start drilling it out πŸ˜…. It weighs 990 grams, so i guess it ain't that bad

Re: Unstuffing a crankshaft for decreasing weight?

Crankcase stuffing is an archaic practice that should have died out in the 50's. It was used on Villiers and other motors that had huge crankcase volumes and horrible flow rates. Technology has come a long way since then.

Re: Unstuffing a crankshaft for decreasing weight?

operator error 696 420 /

> baird co wrote:

> -------------------------------------------------------

> Crankcase stuffing is an archaic practice that should have died out in

> the 50's. It was used on Villiers and other motors that had huge

> crankcase volumes and horrible flow rates. Technology has come a long

> way since then.

Have you seen some of the dirt bikes crank cases? They stuff the hell out of them, it basically looks like a four stroke

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