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Quota Swingarm > Tonti Frame?

geodoc

geodoc

Cruisin' Guzzisti
Joined
Oct 27, 2008
Messages
205
I'm wondering if there's anybody that has access to a Quota swingarm that can measure the distance between both the outboard surfaces across the swingarm pivots. I'm curious to know if one could be installed without undue modification to a Tonti frame.

Also wonder the distance from the swingarm pivot centerline to the axle centerline.

It has to do with "Mystery Project X from Planet 1222"


And no ..................... it's not like this

http://www.dieselbike.net/Hamm10/GuzziLHS.jpg

GD
 
Hey Doc,

I'll see what I can do tomorrow when it warms up a bit.

Seems like it should work since they're both 5 spds. Don't think the pivot points on the various tontis were changed, MG reshaped the swing arms to accommodate larger size tires.

The only modification you'll need to do is to anchor the other end of the mono shock. If you go with twin shocks then a left side shock mount will be needed on the swing arm.
 
Heh Raf,

I'd appreciate the numbers. This project is still just an idea, but winters are long and the garage is heated.

The Quota swingarm looks to be a fair bit stiffer than the standard Tonti item & accommodates a wider tire too. Whether adapt the mono-shock or convert to dual-shock would be worthy of further consideration if it looks like it's an easy fit.

GD

Rafael said:
Hey Doc,

I'll see what I can do tomorrow when it warms up a bit.

Seems like it should work since they're both 5 spds. Don't think the pivot points on the various tontis were changed, MG reshaped the swing arms to accommodate larger size tires.

The only modification you'll need to do is to anchor the other end of the mono shock. If you go with twin shocks then a left side shock mount will be needed on the swing arm.
Click to expand...
 
Oops forgot about this thread.

Anyway, I couldn't measure the Quota swing arm from pivot bearing to pivot bearing, too concealed, so I measured to the inside face of the bottom sub-frame rail lug that mates with the frame lug where the pivot bolts pass through. This dimension matches the 850-T, about 12 inches.

Seeing the pics that Greg provided I am more certain that they are the same.
 
Ha ! ...................

So - the next question is where's there a hoard of Quota swingarms. Somehow I don't think that there will be that many languishing under various workbenches looking for better use after being liberated via eBay.

Rafael said:
Oops forgot about this tread.

Anyway, I couldn't measure the Quota swing arm from pivot bearing to pivot bearing, too concealed, so I measured to the inside face of the bottom sub-frame rail lug that mates with the frame lug where the pivot bolts pass through. This dimension matches the 850-T, about 12 inches.

Seeing the pics that Greg provided I am more certain that they are the same.
Click to expand...
 
geodoc said:
The Quota swingarm looks to be a fair bit stiffer than the standard Tonti item & accommodates a wider tire too.
Click to expand...

What leads you to believe that a Quota swingarm will accomodate a wider tire than a California swingarm?

The '02-up California swingarm should be wider. Bracing a California swingarm seems more doable than finding a Quota swing arm.
 
The length of the '02 & up swingarm is a minus as well as the cross section of the tubes which are apparently the same as the early bikes.

Stock Quota rear tire = 130/80-17

Also wish to avoid making an already heavy stock Tonti swingarm even heavier by adding bracing.

G

rocker59 said:
geodoc said:
The Quota swingarm looks to be a fair bit stiffer than the standard Tonti item & accommodates a wider tire too.
Click to expand...

What leads you to believe that a Quota swingarm will accomodate a wider tire than a California swingarm?

The '02-up California swingarm should be wider. Bracing a California swingarm seems more doable than finding a Quota swing arm.
Click to expand...
 
geodoc said:
The length of the '02 & up swingarm is a minus as well as the cross section of the tubes which are apparently the same as the early bikes.

Stock Quota rear tire = 130/80-17

Also wish to avoid making an already heavy stock Tonti swingarm even heavier by adding bracing.

G

rocker59 said:
geodoc said:
The Quota swingarm looks to be a fair bit stiffer than the standard Tonti item & accommodates a wider tire too.
Click to expand...

What leads you to believe that a Quota swingarm will accomodate a wider tire than a California swingarm?

The '02-up California swingarm should be wider. Bracing a California swingarm seems more doable than finding a Quota swing arm.
Click to expand...
Click to expand...

You're saying a 130 is wide?

Be sure and post up the weight comparison, when you acquire your Q swingarm.

I think you'll find that the Q's swingarm is quite heavy.
 
My buddy's Quota has a Pirelli 130 Scorpion Trail on it and there's about a 10mm gap between the swing arm and the tire. So depending on your tire selection and rim size, I bet a 150 can fit. The swingarm already has an indent for the tire so there's no room for expansion there.

If you go with the mono shock you're going to need more than the swingarm from the quota. Seems that a wrecked Quota can provide the shock anchor to the frame as well. If you go with dual shocks I don't see the point of using the Quota swingarm. Just use a Cali, guessing that it needs less structural rigidity since it has two additional support points (2 shocks).
 
a 130 is wider than what a T3, LM1, 2, 3, etc. can accommodate w/o denting or installing a plug then machining a clearance notch (the later method on a 1000SP swingarm to use a 130/80 X 18).

Yeah, just conjecture at this point that it's no heavier than a T3, LM 1, 2, 3, etc., but certainly not expecting it to be lighter. It looks as though there was thought given to placing material in the areas where bending loads would occur and if they designed it with lighter material, it might be no heavier. Like I said, strictly conjecture w/o weighing one.

GD

[/quote]You're saying a 130 is wide?

Be sure and post up the weight comparison, when you acquire your Q swingarm.

I think you'll find that the Q's swingarm is quite heavy.[/quote]
 
What I was trying to convey in my previous post was that I once modified a (late 70's I believe) 1000SP swingarm to accommodate the width of a 130/80 x 18 tire. I did this by machining an approx. 2" long sleeve that was pressed into the swingarm just aft of the carrier bearing and then machined the inside of the swingarm to create a clearance notch for the extra tire width. And yes, the swingarm from a 1000SP is common to the T3 and I also assume the Convert, G5, LM 1 & 2 - "short swingarm" disc brake models.


Rafael said:
geodoc said:
(the later method on a 1000SP swingarm to use a 130/80 X 18)
Click to expand...
that must be the SP II or III. the 1000SP & SP-NT came with the T-3 swingarm.
Click to expand...
 
Hello George,
I am the one that build that hideous looking V7 / Quota contraption. In Victoria by the way.
Not much room to spare for a wider tire than 130/90/17. Also the notch in the swing arm was in the wrong place since the 130/90 is really tall. A lot taller than for example a stock 18" wheel combo.
The swing arm is really heavy, when fitted with twin shocks you could grind off the the lugs for the mono shock links but that won't make too much difference in my opinion. Maybe all you gain is looks....
The suggested Cali swing arm might be your best bet.
Cheers, JR
 
scan0002.jpg


This is a pic of a special I built a few years back.S3 frame and trimmed bevel box,tuned cali 2 engine.
LM 3 swinging arm ( I used this because it was larger diameter tube and had an indent for tyre clearance ),English after-market 17" wheels. 150 rear tyre.The indent in the std LM swinging arm suited the 17" wheel better than the original LM one!
Wheel had to be slightly off-set which I was a bit concerned about until I spoke to Raceco,English based Guzzi specialist who had great success racing a Guzzi with an of-set rear wheel.The boss said he did not tell the rider the wheel was off-set,and he never complained about the handling!

The bike above was a great handler also.
 
Pinwall cycle is wrecking a Quota. Not sure what is left. Ebay? I will look through my old emails from when I was looking for Quota parts. I know there was one with front end damage that I saw a while back.
 
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