Paso 20mm swingarm pivot modification
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Paso 20mm swingarm pivot modification
I found that the Paso has a 15mm swingarm pivot. That is very small especially considering that all other Ducati models since 1990 they have used a 20mm pivot. So I decided that I wanted to upgrade.
This would require modifications to the frame and the bearings in the swingarm.
This would require modifications to the frame and the bearings in the swingarm.
- Attachments
-
- Paso-pivot-1_zpsdywrjf4b.jpg (218.68 KiB) Viewed 12186 times
-
- Paso-pivot-2_zpsicwih7xi.jpg (256.29 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
I found a 20mm axle from some Japanese bike was very close in spec to the Paso pivot.
- Attachments
-
- Paso-15-20%20pivot_zpsutn3mf60.jpg (298.55 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
My plan was to bore out the frame but it was impossible to fit in a milling machine. So I made fixtures that allowed me to drill out the holes in steps.
- Attachments
-
- Paso-fixture-1_zpsyvc7fl80.jpg (309.08 KiB) Viewed 12186 times
-
- Paso-fixture-2_zpsqzqszulh.jpg (261.25 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
Measuring the inside of the frame I realized that there would be very little surface area left so I had cups machined that I welded over the original pivot area.
- Attachments
-
- Paso-pivot-3_zpsgufkslsm.jpg (263.23 KiB) Viewed 12186 times
-
- Paso-pivot-4_zps1eykjsfg.jpg (238.4 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
Modifications to the bearings in the swingarm were pretty straight forward. Sourced some new bearings and made a few new spacers.
- Attachments
-
- Paso-RH-swingarm-2_zpszcuwk47r.jpg (174.96 KiB) Viewed 12186 times
-
- Paso-RH-swingarm-1_zpsdbjdtfdg.jpg (131.94 KiB) Viewed 12186 times
-
- Paso-LH-swingarm-2_zpsxxy6b9kl.jpg (173.45 KiB) Viewed 12186 times
-
- Paso-LH-swingarm-1_zpsdxiwvsbc.jpg (151.62 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
I had to turn the head of the new pivot down slightly to fit down the frame pocket.
On the other side I had to source a small OD flange nut.
Everything fit so I could install the black plastic caps.
On the other side I had to source a small OD flange nut.
Everything fit so I could install the black plastic caps.
- Attachments
-
- Paso-20mm-3_zpshsnbowuc.jpg (259.5 KiB) Viewed 12186 times
-
- Paso-20mm-4_zpsbzbcwbeb.jpg (277.7 KiB) Viewed 12186 times
-
- Paso-20mm-1_zpsyfkqnbep.jpg (189.63 KiB) Viewed 12186 times
-
- Paso-20mm-2_zpsmjyfmecd.jpg (215.97 KiB) Viewed 12186 times
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
This should make for a much stiffer chassis.
- Attachments
-
- Paso-pivot-final_zpsugmhmvop.jpg (164.37 KiB) Viewed 12186 times
- englishstiv
- paso grand pooh-bah
- Posts: 1111
- Joined: Wed Apr 09, 2008 9:57 pm
- model: 907 I.E.
- year: 1992
- Location: Manchester, England.
Re: Paso 20mm swingarm pivot modification
I absolutely love shit like this, Well done and brilliant photo's and explanation I think G will be putting this in the FAQ thread pretty soon
DUCATI 907ie 1992
HARLEY DAVIDSON ELECTRA GLIDE CLASSIC 1991
HARLEY DAVIDSON ELECTRA GLIDE CLASSIC 1991
-
- paso grand pooh-bah
- Posts: 1879
- Joined: Wed Dec 05, 2007 12:35 am
- model: 906 Paso
- year: 1990
- Location: New Zealand
Re: Paso 20mm swingarm pivot modification
I love shit like this too , more the psychiatric side of things than anything to do with motorcycle engineering . I mean your obviously no dummie when it comes to making things outa metal but if you really wanted to stiffen up the chasis you shoulda just painted it , any how , nice job ...... if you must
I wish I was young again............Id be heaps smarter than last time
-
- Posts: 50
- Joined: Sun Jul 12, 2009 1:56 am
- model: 906 Paso
- year: 1989
- Location: Minnesota, USA
Re: Paso 20mm swingarm pivot modification
The frame will be powder coated once I finish the rest of the modifications to install the 999S motor
-
- paso grand pooh-bah
- Posts: 1879
- Joined: Wed Dec 05, 2007 12:35 am
- model: 906 Paso
- year: 1990
- Location: New Zealand
Re: Paso 20mm swingarm pivot modification
Oh yeah ! I can so see why you'd want to do that. Have you thought about fitting the Paso body work to a 999s ?
I wish I was young again............Id be heaps smarter than last time
Re: Paso 20mm swingarm pivot modification
Hi, soory but maybe I've missed it: how did you solve it with the bearings in the engine case?
Also, what is your main reason to go from 15 to 20mm?
Frank
Also, what is your main reason to go from 15 to 20mm?
Frank
Bimota SB4-S - 1984
Ducati Paso 750 - 1989
Suzuki SV1000S - 2008
Ducati Monster 796 abs - 2010
Ducati Paso 750 - 1989
Suzuki SV1000S - 2008
Ducati Monster 796 abs - 2010
- paso750
- paso grand pooh-bah
- Posts: 5558
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: Paso 20mm swingarm pivot modification
I assume the 999 engine originally uses a 20mm swingarm pivot.how did you solve it with the bearings in the engine case?
Re: Paso 20mm swingarm pivot modification
Ok, missed that (the 999 engine).
Wow, quit a project!
Assume that adapting the swingarm bolt is the easiest modification
Will be interesting to see the project in progress!
Good luck
Wow, quit a project!
Assume that adapting the swingarm bolt is the easiest modification
Will be interesting to see the project in progress!
Good luck
Bimota SB4-S - 1984
Ducati Paso 750 - 1989
Suzuki SV1000S - 2008
Ducati Monster 796 abs - 2010
Ducati Paso 750 - 1989
Suzuki SV1000S - 2008
Ducati Monster 796 abs - 2010
- paso750
- paso grand pooh-bah
- Posts: 5558
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: Paso 20mm swingarm pivot modification
Speedmade, don`t mind me asking but seeing that the thread of the 20mm pivot is longer I wonder which part of it sits in the frame. Hope you get what I mean. (if it`s the threaded part it could cause radial play, which may be gone if all is tightened up, but still...)