Author Topic: Rear Axle spacer lengths  (Read 1852 times)

Offline ccoli

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Rear Axle spacer lengths
« on: January 09, 2015, 02:55:57 PM »
Can someone measure the spacer length on a Cal Vintage or Stone for me? This is the spacer that fits in the rear drive. On older models T3 etc they are about 60mm. On EV's and the like they are about 65mm. I suspect they are a little longer on the Vintages. No need to remove it from the drive.
Wisconsin MGNOC Rep
03 EVT/EML hack, 93 SPIII, 3-78 Robins, 74 Eldo, 32 Sport15, Ambo custom.

Offline pehayes

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Re: Rear Axle spacer lengths
« Reply #1 on: January 09, 2015, 04:41:14 PM »
Careful Chris.  When the 98 EV first came on the road, the supplied stock rear tire was a rather narrow affair.  Nothing in the aftermarket matched it.  Even with the same specification numbers, every other tire was slightly wider.  Clearance to the shaft side swingarm tube was critical and most aftermarket tires would rub.  The Guzzi solution was to provide a slightly longer axle tube spacer for the rear drive so that the entire wheel would be offset to the left (3mm?) and clear the swingarm.   As a result, the rear brake caliper carrier bracket would also move left and bind or interfere with the brake anchor pin threaded through the left side of the swingarm.  Thus, the "kit" now also included a similarly shorter brake anchor pin to restore proper clearance on that side.

Time has passed.  Parts get moved around on old bikes.  Consequently, you might get a variety of answers to your question.

Patrick Hayes
Fremont CA

Offline ccoli

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Re: Rear Axle spacer lengths
« Reply #2 on: January 10, 2015, 02:22:44 PM »
Thanks Patrick,
 Still trying to figure out how to fit my Stone based wheels into my 03 EV Sidecar bike. Cal Vintage uses the same parts as the Stone. Parts list shows different axles, brake holder, the spacer in the rear drive and the drive spline in the rear drive that engages the cush drive in the wheel. Stone/Vintage also has an extra spacer by the brake plate.
It appears that they are spacing the narrower wheel away from the drive to keep it centered. So the spacer in the rear drive is probably longer yet and the drive spline may be taller to keep the splines engaged properly.
Sidecars are Fun!
Wisconsin MGNOC Rep
03 EVT/EML hack, 93 SPIII, 3-78 Robins, 74 Eldo, 32 Sport15, Ambo custom.

Offline guzzisteve

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Re: Rear Axle spacer lengths
« Reply #3 on: January 10, 2015, 07:14:28 PM »
Chris,   Make sure the drive hub is the same, there were narrow and wider hubs in rear drive. Round swingarms had one and rectangle box had the other
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Re: Rear Axle spacer lengths
« Reply #3 on: January 10, 2015, 07:14:28 PM »

Offline ccoli

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Re: Rear Axle spacer lengths
« Reply #4 on: January 11, 2015, 12:43:33 PM »
ANd it looks like the Vintage/Sones may have had even a wider one. Have Examples here of everything but a Stone/Vintage one.. Anyone got a pictures of one???

Chris,   Make sure the drive hub is the same, there were narrow and wider hubs in rear drive. Round swingarms had one and rectangle box had the other
Wisconsin MGNOC Rep
03 EVT/EML hack, 93 SPIII, 3-78 Robins, 74 Eldo, 32 Sport15, Ambo custom.

 

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