Swingarm

Hi:

I use a SFC 750 swingarm on my: Laverda 1000 Endurancer racer.

Br
Peder
 

Attachments

  • 1974 racer 2.jpg
    1974 racer 2.jpg
    199.1 KB · Views: 30
My 80 Jota has a drum brake twin swing arm to give me the room to run a 150/70 rear tyre. Been in for years copping a flogging😂😂👍
Tom
 
I am guessing the twin-cylinder twin leader rear swingarm is the same as the 3c twin leader swingarm but I very much doubt I could fit a 150 rear tyre in my 3c. I have a 140 tyre and even that needed a fair bit of chain guard modification, moving it as far right as possible and trimming its front end to clear the frame rail to get anywhere near to fit. There is bearly a Bees dick left for any more tyre as far as I can see. That's with a 3.00 rear rim and a 530 rear chain. That 140 tyre on a 3.00 rim has a fitted width of 145mm so that's 2.5mm on each side, I can live with that. Any bigger tyre would absolutely require a bigger rear rim and a narrower 520 chain, pretty sure those with 150 tyres have done that as well. No idea what is needed to clear the chain guard though. I remember seeing Doug Homes's chain guard after he did Suzuki wheels, it was circumcised to half its length.
 
Vince said:
I am guessing the twin-cylinder twin leader rear swingarm is the same as the 3c twin leader swingarm but I very much doubt I could fit a 150 rear tyre in my 3c. I have a 140 tyre and even that needed a fair bit of chain guard modification, moving it as far right as possible and trimming its front end to clear the frame rail to get anywhere near to fit. There is bearly a Bees dick left for any more tyre as far as I can see. That's with a 3.00 rear rim and a 530 rear chain. That 140 tyre on a 3.00 rim has a fitted width of 145mm so that's 2.5mm on each side, I can live with that. Any bigger tyre would absolutely require a bigger rear rim and a narrower 520 chain, pretty sure those with 150 tyres have done that as well. No idea what is needed to clear the chain guard though. I remember seeing Doug Homes's chain guard after he did Suzuki wheels, it was circumcised to half its length.
Click to expand...
The triple swing arms has basically two straight tubes, welded into a V

The twin swing arms are two bent tubes, parallel from ends forward to about the rim, the bends then head to the pivot tube in a V

Ah fuck, it’s too hard to explain….. see the picture The orange one is a twin one.
 

Attachments

  • image.jpg
    image.jpg
    82.4 KB · Views: 38
Buggar you Chris, its pissing down in Sydney and you made me head out to the shed and look at my swingarm. My 3c is the same as I guess all triple-disc brake rear swingarms in basic shape, even with its drub brake. Straight legs pretty much from wheel attachment to the swingarm pivot, not including brake attachment brackets. So that crank or bend in the twin arm must add a bit of distance between each arm out away from the wheel axil and giving a tiny bit more space for a 150 tyre.
 
Vince,

The "disc" swingarms were all the same, ie, the SF3 was actually fitted with a 3CL item. The "drum" swingarm of the twins offers a bit more clearance where it's needed when wide rubber is fitted.

piet
 
You must log in or register to reply here.
Back
Top