Author Topic: proper way to install rear drive  (Read 388 times)

Offline mtiberio

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proper way to install rear drive
« on: March 21, 2021, 05:59:41 AM »
After having pulled rear drives and swingarms about a million time during my 42 years of guzzi ownership, I have the following to offer...

If you want your rear axle (talking pre spine or CARC here) to easily come out or go in with only fingertip pressure do the following.

Install swingarm
Attach rear drive unit with the nuts loose
insert wheel and engage splines
Deal with brake, drum backing plate or caliper hanger
Run the axle through
(important stuff here):
tighten the axle nut first
then tighten the rear drive nuts
then tighten the pinch bolt

Why does this work? The rear drive studs in the swingarm have a bit of slop, by inserting the axle and tightening the axle nut, you draw up the entire wheel and rear drive assembly, and the pinch bolt area forces the axle (and rear drive) to be properly aligned. You should never have to hammer an axle. Similar tips for the front end exist, but there it gets trickier due to dampers or tapered tube tops etc.

Offline Scout63

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Re: proper way to install rear drive
« Reply #1 on: March 21, 2021, 07:07:39 AM »
Just in time for my rear drive installation. WG has gotten even better - answers appear BEFORE questions are asked.  Great info.
Ben Zehnder
Orleans, MA USA
1971 BMW R75/5
1972 Norton Commando Combat Interstate
1977 BMW R100S - on deck
1978 Yamaha SR500
1979 Moto Guzzi V1000G5 - current project
1980 Moto Guzzi v50ii

Online usedtobefast

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Re: proper way to install rear drive
« Reply #2 on: March 21, 2021, 11:57:28 AM »
So if a person did this the wrong (normal) way, what would happen or how would you know it?

My Quota has some driveline noise ... one post on here said their's sounded like a 70's dump truck and I thought "I know that sound!"  :grin:

I pulled the swing arm expecting to find all sorts of telltale signs of issues ... but everything looked great, no wear, nicely greased up, the support bearing in swingarm was in great condition, u joints seemed great ... put it all back together, still got that 70's dump truck sound.

Wondering if this could help. 
2017 V7 iii Racer
2017 Griso
2016 Stornello
2000 Red Quota
Want a black/green 1000S big valve :)

Offline moto-uno

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Re: proper way to install rear drive
« Reply #3 on: March 21, 2021, 10:53:58 PM »
 ^ Let's just say that it's so easy to do , why wouldn't you ?  Peter

Wildgoose Chase Moto Guzzi

Re: proper way to install rear drive
« Reply #3 on: March 21, 2021, 10:53:58 PM »

Online Kiwi_Roy

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Re: proper way to install rear drive
« Reply #4 on: March 22, 2021, 06:56:04 AM »
Thanks for those tips

For a CARC bike this simple bolt makes aligning the back wheel so much easier.
Just a MS bolt from your hardware store with the head cut off.
72 Eldorado
07 Griso 1100
17 V7iii Special

Moto Guzzi - making electricians out of riders since March 15 1921

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