Balancer Shaft

[xstian]

Hi does anyone know if the balancer shaft it interchangable between mk's?

I had a quick look but couldn't find the answer. I might be getting confused with another forum, but is there a "what parts are interchangable with what mk's" post?

Cheers Christian.

[jompy]

Try this viewtopic.php?f=20&t=5536
also theres a thread called various parts for finding alternative parts

[fallenmikethebike]

With very little work one of these could be made to fit,they do a 25mmx 35mmx 50 mm long, so long enough to cut a couple out of.
http://simplybearings.co.uk/shop/index.php?cPath=3_4523

How would they stand up to the task???? Hell of a lot cheaper though.
Mike

[xstian]

I've put a mk 2 shaft into my mk 3. When I started the engine it knocked like the mains had failed.

I can see that the bearings are all the same, I just wated to know if they are weighted diferently or something.

[xstian]

Has anyone got any ideas on this balancer shaft?

I have pulled the engine apart and there doesn't apear to be anything wrong with it. Most annoying the engine had never been apart before.

Still a freshen up is not going to do it any harm.

Christian

[helisupp]

I am having an engine fully overhauled and am changing the balancer shaft as a routine part, (the balancer shaft removed looked great but am changing everything that runs on or directly in bearings).

If you need a shaft (from an AR) I would sell it for £40 after I get the engine back in next week or so.

[fallenmikethebike]

A lot of people just immobilise the shaft, this improves the throttle response, for a smidgeon more vibration.
Mike

[xstian]

I want to keep the balancer shaft. I think it is part of the appeal of the engine.

The balancer shaft bearings had gone and when I pulled the shaft out it had, had it. I had a good shaft from a mk2 so put it in. I ran the bike and bled the oil pump. When I started the bike for the second time it had a nasty rattle when idleing. I thought I hadn't bled the oil pump and ballsed the main bearings. I pulled the engine apart and all looked in ok condition.

So before I put the engine back together I wanted to know if there is any difference between the balancer shafts from different mk's. Something was causing the rattle.

[knackeredMk1]

I don't think there is a fundemental difference between the balance shafts though the Mk1 certainly has a different shape.

[xstian]

[quote="knackeredMk1"]I don't think there is a fundemental difference between the balance shafts though the Mk1 certainly has a different shape.[/quote]

Ok thank you. I'll put it back together and keep an eye out for some thing else.

Any ideas?

[knackeredMk1]

Have you lined up the marks on the drive side of the balancer shaft and crank

[xstian]

Yeah the shaft was timed up right. I'll put it back together and see what happens.

Thanks Christian.