Swingarm Breakage

discussions specific to the 750 Paso

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Fraser
Posts: 334
Joined: Tue Jan 17, 2006 12:00 am
model: 750 Paso
year: 1986
Location: Lower Hutt, New Zealand

Swingarm Breakage

Post by Fraser »

When adjusting the chain tension the left hand end of the swingarm cracked where the cap screw is fitted. On that side it was easy to remove the cap screw, where the other side required some effort. After adjusting the chain then tightening the cap screw, it was just starting to grip then went loose, just a little bit more and the cracks appear. You can see the threads of the cap screw where the aluminium split.

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The swingarm before chain adjustment.

Bit of a pain, just getting ready for our summer riding. Now more delays.

Cheers,

Fraser.
750 Paso
1980 Moto Morini 500 Sport
Mc tool
paso grand pooh-bah
Posts: 1875
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: Swingarm Breakage

Post by Mc tool »

Fraser ,I have a couple of spare 906 swing arms ( left over from my 17" conversion plan ) , just say the word and its on its way :)
I wish I was young again............Id be heaps smarter than last time
User avatar
Fraser
Posts: 334
Joined: Tue Jan 17, 2006 12:00 am
model: 750 Paso
year: 1986
Location: Lower Hutt, New Zealand

Re: Swingarm Breakage

Post by Fraser »

Hi Hamish,

Will drop you an e-mail and take you up on that offer.

Cheers,

Fraser.
750 Paso
1980 Moto Morini 500 Sport
User avatar
Skins
paso grand pooh-bah
Posts: 1304
Joined: Tue Oct 26, 2004 12:00 am
model: 750 Paso
year: 1988
Location: Kapiti, New Zealand

Re: Swingarm Breakage

Post by Skins »

Good man, Hamish!
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Fraser
Posts: 334
Joined: Tue Jan 17, 2006 12:00 am
model: 750 Paso
year: 1986
Location: Lower Hutt, New Zealand

Re: Swingarm Breakage

Post by Fraser »

Hi Erskin,

Yep, he's being a good boy helping out. Looks like the 750 and 906 swing arms are the same, at least they are according to the parts manuals, they have the same part number.

Cheers,
Fraser.
750 Paso
1980 Moto Morini 500 Sport
User avatar
Skins
paso grand pooh-bah
Posts: 1304
Joined: Tue Oct 26, 2004 12:00 am
model: 750 Paso
year: 1988
Location: Kapiti, New Zealand

Re: Swingarm Breakage

Post by Skins »

8)



Hi Fraser

Yep, this sure is a great community - Gerhard is helping me at the moment with the purchase of a starter clutch over in Germany (a unit made by a company called Ringspann - if it does the job I'll let everyone know) and sending it to me, saving me some money over what Ringspann's Aussie agents quoted.

I talked to Gowanloch Ducati about replacement sprag clutches, but they said the only ones they knew of for the Paso were SKF ones they had heard about which apparently did not last well. Other than that, they offered a "V2 conversion kit that uses the later model 916/996 - sprag Cost is $690" which came complete with "bearing housing and the ring gear (which is usually worn but are no longer available)"
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JWilliam
Posts: 331
Joined: Wed Oct 06, 2004 12:00 am
model: 906 Paso
year: 1989
Location: Nottingham, UK

Re: Swingarm Breakage

Post by JWilliam »

I'll say it again that I thoroughly recommend a sliding adjuster conversion. This can be done by practically any drag racing specialist. Additionally, the box section swingarm of the 750/906 is ideal for this work, it being a heavy gauge aluminum. Since this failure has happened after many years of service, it follows that it will happen again.
Image
Mc tool
paso grand pooh-bah
Posts: 1875
Joined: Wed Dec 05, 2007 12:35 am
model: 906 Paso
year: 1990
Location: Newzealand

Re: Swingarm Breakage

Post by Mc tool »

JWilliam wrote:I'll say it again that I thoroughly recommend a sliding adjuster conversion. This can be done by practically any drag racing specialist. Additionally, the box section swingarm of the 750/906 is ideal for this work, it being a heavy gauge aluminum. Since this failure has happened after many years of service, it follows that it will happen again.
Image
Yeah but the eccentric adjusters are pretty much unique to the Paso's, look cooler and work just fine . Plus it would be way cheaper to weld up that split , redrill and helicoil it back to original :)
I wish I was young again............Id be heaps smarter than last time
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