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Author Topic: Cush drive questions  (Read 5059 times)

Offline duTch

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Re: Cush drive questions
« Reply #30 on: 03.06. 2014 09:04 »

 Dunno Trev-I won't say you're wrong as I haven't seen lots of them, but all the cush springs I have seen (A10) have been round section,and the slide in the service book appears to have a round one? but the M20 I had, had a square section clutch spring...?
   *dunno* *dunno*
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline BSA_54A10

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Re: Cush drive questions
« Reply #31 on: 03.06. 2014 10:35 »
I have had bikes with both round & square ones then again none of them were brand new when I got my hands on them.
FWIW my current M20 has a round spring which I can push on and start to turn.
it came with a square section that was a lot stiffer which I have never used as I can not compress it far enough to start the threads.
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Bike Beesa
Trevor

Offline duTch

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Re: Cush drive questions
« Reply #32 on: 12.06. 2018 10:53 »

 I copy and pasted Drews BotoPhucket pics to a thingy, so I can paste them so they easier to see and in case B-P implodes, but can't figure how to do it just now so *watch this space*.... *conf2*
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Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline BSA_54A10

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Re: Cush drive questions
« Reply #33 on: 12.06. 2018 13:56 »
From what I can make out is the early cush drive which had 4 lobes was fitted with the heavier square section spring and the latter 2 lobe cam got the softer round ones.
I have not seen a new square section spring for a very long time as the modern pattern parts are round section.
But every now & then some NOS square section ones turn up
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