Hi,

I'm just curious as to how people generally transfer the drive from a bike engine to the rear wheels.. i'm just interested as i've heard about diffs, even sierra diffs and was just wondering how it all works/fits..

any info and pics would be appreciated.

i've looked through 30 odd pages but haven't found much, so, yeah, it must be a noobie tipic of discussion! lol

Bike engine mounted longitudinally then a drive flange that replaces the bike sprocket on the gearbox. Then just a prop shaft straight off this flange down to a sierra diff.

Steve

[Edited on 31/1/08 by Howlor]

Hi. I'm a newbie too

From what I can see, most front engined cars replace the bike output with a suitable flange to bolt a propshaft onto whilst the mid engined ones often use a chain.

Hope I'm not leading you up the garden path....

Someone more knowledgable will be along soon to confirm/deny!

Ah! that makes sense for the front engined cars..

So if the rear engined cars use a chain, how does that work? do you just use the sierra diff again except get an adaptor onto that to allow a sprocket to fit and use a short chain?

Yep you use an open diff with a gear around it. Then mount the engine tranverse and run the chain like a normal bike would.

You can use a shaft drive bike engine and put it straight in to a sierra diff.

Steve

propshaft attached to an adaptor on a bike engine output shaft

i see i see.. yeah well that gives me more to think about then, seems very simple and do-able..

plus i miss not having the scream of a bike engine next to me! very tempting.

So has anyone ever gotten a sierra prop shortened and balanced to allow for a mid-engine setup without using a chain obviously.. i fancy the idea of a bike engine but i don't fancy the constant maintenance, adjustments and replacement of a chain and sprockets.


oh btw, that looks very nice BigRich!

[Edited on 31/1/08 by KevDo]

this pic shows my engine and prop

If you use a shaft driven engine like a ST1100 you don't have to faff around with chains Just shut + cut a propshaft

like this for mid/rear engined.

this is for twin bike engines. You would substitute a std car diff for the shaft in the pic. a driven sprocket bolts to each end of the shaft and a cv joint recesses into each end



Fiat bootspace Dec 07


[img][/img]

Chain drive in my mid engined set up.

wow! loving the twin engined buggy there!..

The chain drive one looks like good work!! any advantages of using the chain/sprocket on the shaft over using a car diff? i assume there will be bigger loses using the diff over the chain.

Another option
Rescued attachment DSCF0087.JPG

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any advantages of using the chain/sprocket on the shaft over using a car diff?

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