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Bike Engine Sprocket Rotation...
scootz - 22/3/13 at 09:02 PM

Does it make any difference if a chain / belt is pulled over or pulled under a bike engines sprocket?

The only thing I can think of is there might be a bit more 'lash' if pulled under it (???).

40inches - 22/3/13 at 09:08 PM

Are you thinking of the engine being behind the driven axle?

scootz - 22/3/13 at 09:24 PM

Nope... I'm thinking of turning a shaft driven bike engine through 90 degrees and putting a sprocket on the counter-clockside rotating output flange.

40inches - 22/3/13 at 09:39 PM

Aparently should be ok. Look near the bottom of the second page in this PDF figure 2.

scootz - 22/3/13 at 09:46 PM

Thanks for that!

scootz - 23/3/13 at 10:52 AM

Of course the eagle-eyed amongst you will already have sussed that a counter-clockwise rotating output shaft is going to drive the rear wheel backwards!!!

Doh!

40inches - 23/3/13 at 10:56 AM

Suppose that depends on front or rear wheel drive, you may have to turn the car around

Slimy38 - 23/3/13 at 11:04 AM

quote:
Originally posted by scootz
Nope... I'm thinking of turning a shaft driven bike engine through 90 degrees and putting a sprocket on the counter-clockside rotating output flange.


The one problem I can see is that a shaft driven bike will not normally have the sideways forces applied that come from driving a chain. My bike has a massive bearing just on the output shaft, that is designed to resist the chain forcing the shaft sideways. A shaft driven bike may not have the same resistance and may quickly wear the bearing.

Peteff - 23/3/13 at 12:59 PM

What shaft driven bike is it ? Some drive from the right and some from the left. If you take the shaft unit off and the gear you will not need to turn the engine just fit a sprocket in it's place.

scootz - 24/3/13 at 05:56 AM

It's a Triumph Rocket engine. A wee bit of an oddity as its mounted longitudinally.


scootz - 24/3/13 at 06:12 AM

40inches - 24/3/13 at 11:28 AM

The manufacturing process of the Rocket 3 is very interesting. Rocket 3

Peteff - 24/3/13 at 11:37 AM

A friend of mine has one with a supercharger fitted. It will be good if he ever gets it running right.

Slimy38 - 24/3/13 at 01:04 PM

quote:
Originally posted by 40inches
The manufacturing process of the Rocket 3 is very interesting. Rocket 3


I'm worried, I didn't notice what was going on until more than half way through...

40inches - 24/3/13 at 01:10 PM

quote:
Originally posted by Slimy38
quote:
Originally posted by 40inches
The manufacturing process of the Rocket 3 is very interesting. Rocket 3


I'm worried, I didn't notice what was going on until more than half way through...


You need to be worried