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Windy01/12/2018 12:03:21
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699 forum posts
202 photos
Posted by thaiguzzi

Very nice.

I presume alignment is on the top portion with the knife edges, and the balancing done below on the 2 pairs of brgs?

Many years ago, we did static balancing on our knife edges too.

Bob R - lovely work on the pre unit single.

The bearings are mainly for aligning the pressed up crankshaft similar to a Alpha-Tru aligner the straight edges for balancing.

alpha tru

thaiguzzi02/12/2018 05:10:33
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470 forum posts
104 photos
Posted by Windy on 01/12/2018 12:03:21:
Posted by thaiguzzi

Very nice.

I presume alignment is on the top portion with the knife edges, and the balancing done below on the 2 pairs of brgs?

Many years ago, we did static balancing on our knife edges too.

Bob R - lovely work on the pre unit single.

The bearings are mainly for aligning the pressed up crankshaft similar to a Alpha-Tru aligner the straight edges for balancing.

alpha tru

Thanx for that. And yes please, i would like to buy an Alpha-Tru for 11 Pounds and 10 Shillings please...

JimmieS02/12/2018 19:07:58
235 forum posts
1 photos

Have we seen this already? Sorry but memory now not as good as I think.

Jim

**LINK**

duncan webster02/12/2018 19:13:49
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1767 forum posts
25 photos

So having found that it is out of true what do you do? Just hit it with a lead hammer, or do you scotch one side with a block to prevent it rotating?

This is probably becoming a lost art as Japanese bikes seem to last forever (I will now go and wash my mouth out)

not done it yet02/12/2018 19:47:15
2362 forum posts
11 photos
Posted by duncan webster on 02/12/2018 19:13:49:

This is probably becoming a lost art as Japanese bikes seem to last forever (I will now go and wash my mouth out)

Mine didn’t. It cost me £26.10s for a new crank for my Honda twin, back in 1969! Hate to think how much they are these days! It was likely the gearbox failure that precipitated the crank failure at ~21k miles, but the rod bearings were already at, or outsde, the service limits laid down (4mm rock at the small end?). No gaskets needed between the top and bottom crankcase/gearbox halves, mind - and no leaks afterwards.

Windy02/12/2018 21:06:05
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699 forum posts
202 photos
Posted by duncan webster on 02/12/2018 19:13:49:

So having found that it is out of true what do you do? Just hit it with a lead hammer, or do you scotch one side with a block to prevent it rotating?

This is probably becoming a lost art as Japanese bikes seem to last forever (I will now go and wash my mouth out)

Have seen video of one repairer having a stout upright fixed steel bar with probably a lead block on top just banging the offset flywheel on it a recommended way in some books.

Windy06/12/2018 13:01:55
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699 forum posts
202 photos

Just been notified of my friends machine in Performance Bikes magazine.

 

performance bikes.jpg

Edited By Windy on 06/12/2018 13:02:26

Michael Gilligan06/12/2018 13:30:12
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12025 forum posts
522 photos
Posted by Windy on 06/12/2018 13:01:55:

Just been notified of my friends machine in Performance Bikes magazine.

.

That's mighty impressive

... Hope it goes as good as it looks !!

MichaelG.

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