Like a t*t I have confused myself over which way the flywheel turns when the 2V engine is running and I don't want to put a new sprag in the wrong way round...... So, is it clockwise or anti-clockwise? Thanks AL
Crank turns anti clockwise from the flywheel (left) side, clockwise if viewed from the belt (right) side. Bevel twins were the opposite.
Sorry Derek and Pete, That's why I am confused because that's conflicting with what I have been told by a main dealer mechanic in passing and by the sprag direction arrow.......OEM and replacement (I marked the OEM one when I removed it, although it had an arrow on it pointing to anticlockwise when looking at the back of the flywheel) And the TDC / Advance marks suggest clockwise.....well, they do to me!
i take it there is somit about this starter that don't allow that procedure? where there's a prob there's a fix. is there no chris:smile:
Apologies for the wait....had to charge the battery a bit..........starter pinion turns anti-clockwise As the starter turns in the opposite direction of the flywheel rotation, it appears the sprag arrow should be the same direction as the flywheel rotation. Alternatively, I was hoping someone would quickly press the starter on their 2V bike for a second and look through the timing case window
I have checked the old sprag bearing again and using a magnyfing class I can just see the shape of the OEM circlip where it was against the sprag.... So that means I was installing the sprag in the right direction... Note: I think if the KTM sprag is used, remove the circlip from it and re-use the OEM one.....the KTM doesn't quite have long enough tags to sit well in the flywheel groove. But which way round should these new type gaskets be fitted or doesn't it matter? IE Groove side to engine or rib side to engine? And should 3 Bond be used?
The starter turns anti-clockwise. It turns the intermediate gear which will turn clockwise. The intermediate gear then turns the flywheel gear anti-clockwise. Believe me and Pete 1950, the flywheel turns anti-clockwise viewed from the left of the bike. I don't think it matters which way round the gasket is.
All viewed from the left side of the bike: The rear wheel turns anti clockwise So the gearbox output shaft and sprocket also turn anti clockwise (given the chain final drive) So the gearbox input shaft and clutch turn clockwise. So the crankshaft turns anti clockwise (given the gear primary drive). In the bevel twins, the gearbox input and output are on the same shaft (there is also a layshaft), with the result that the crank turns in the opposite direction.
OK...........I can't argue with anyone about it because I just don't know, so I'll see which way when I eventually fire it up..... I know the sprag is in the right way round because of the witness mark made by the OEM circlip, thus the arrow on old and new sprags show in an anti-clockwise direction viewed from the rear of the flywheel..........that makes clockwise viewed from the outside, which is the confusing bit, not helped by the timing layshaft pulley which runs anti-clockwise when looking from the right.....I think...... Thanks All......
Oh well. If you hit the starter and it just goes whizzzz.... you'll know you've got it wrong. I hope not.
