Author Topic: Guzzi fork swaps (Read 5192 times)

Petrus Rocks · « **on:** January 13, 2019, 02:38:27 PM »

I want to upgrade the forks on my 85 Cal II Franken cafe. Who's done swaps on a Tonti frame?
I know I can buy Showas but offset is important. I don't want it to steer slower.
Anyone have an adjustable Guzzi front end? Preferably right side up forks? The early 2000 GSXR forks are nice but the offset looks too small. Saw one set of Sport forks but they are $$$.
Currently dual disc 35mm front end.

LowRyter · « **Reply #1 on:** January 13, 2019, 02:48:52 PM »

My EV has factory adjustable forks. Left is rebound and Right is compression.

It's not GSX-R but it works for a California.

Petrus Rocks · « **Reply #2 on:** January 13, 2019, 03:02:26 PM »

Yes that could work. the other dimension is the fork length. Ideal is 29-30" length.

guzzisteve · « **Reply #3 on:** January 13, 2019, 03:36:48 PM »

I have a 95 Sport front end, forks, trees, brakes, wheel, fender for my LM3. Modified, braced, swingarm and 4.5" back rim.

Wildguzzi.com · « **Reply #3 on:** January 13, 2019, 03:36:48 PM »

harrytief · « **Reply #4 on:** January 13, 2019, 07:19:46 PM »

I put 2006 gsxr forks on both my cx100. Excellent!!! I got "best" brakes along with "best" suspension. Ohlins out back and instant mini griso.
Well worth the effort. Going from 65mm offset to 30mm offset seems to improve handling and stability for me. You will need to play with front ride height to get trail right. Check the archives for my post.
Harry

harrytief · « **Reply #5 on:** January 13, 2019, 07:24:42 PM »

ccoli · « **Reply #6 on:** January 14, 2019, 10:25:06 AM »

Have a complete set of forks including triple tree from a late model EV. $200 + shipping from Wisconsin.

wirespokes · « **Reply #7 on:** January 14, 2019, 04:12:26 PM »

I'd possibly be interested in the EV forks. Sent you a PM.

s1120 · « **Reply #8 on:** January 15, 2019, 06:36:07 AM »

I would think the EV forks would be awesome for a swap on a older bike. They are right side up like the old ones, but they are MUCH bigger. Not sure how the geometry would work out.. But its guzzi, with huge tubes, and huge brakes..

Petrus Rocks · « **Reply #9 on:** January 15, 2019, 10:23:20 AM »

The EV is a Tonti frame so that helps. 41mm vs 35mm. I nee to see what the offset is. Plus they're adjustable. Definitely an option.

Antietam Classic Cycle · « **Reply #10 on:** January 15, 2019, 10:31:39 AM »

Quote from: Petrus Rocks on January 15, 2019, 10:23:20 AM

The EV is a Tonti frame so that helps. 41mm vs 35mm. I nee to see what the offset is. Plus they're adjustable. Definitely an option.

The EV forks have 45 mm tubes.

Rough Edge racing · « **Reply #11 on:** January 15, 2019, 11:34:48 AM »

45mm, some big meaty tubes... Me and Mr Petrus are friends and often ride together..I have done many fork swaps and look forward to helping him if necessary..My lathe will be humming making spacers , steering stem and or axle or whatever it takes.. If the yoke offset is where it needs to be, the rest just falls into place...

s1120 · « **Reply #12 on:** January 15, 2019, 03:52:47 PM »

Quote from: Antietam Classic Cycle on January 15, 2019, 10:31:39 AM

The EV forks have 45 mm tubes.

I was going to say.. my stone seemed a lot bigger then 41mm tubes

ccoli · « **Reply #13 on:** January 15, 2019, 08:12:55 PM »

Talked to Pete today to confirm that he wants to take it on. Found axle, brake calipers, fender mount/fork brace. Still looking for handle bar rubber mounts. Sounds like he is more than capable of the fiddling to make it work. Got to find a box for it all.

Quote from: Rough Edge racing on January 15, 2019, 11:34:48 AM

45mm, some big meaty tubes... Me and Mr Petrus are friends and often ride together..I have done many fork swaps and look forward to helping him if necessary..My lathe will be humming making spacers , steering stem and or axle or whatever it takes.. If the yoke offset is where it needs to be, the rest just falls into place...

Petrus Rocks · « **Reply #14 on:** January 15, 2019, 09:03:41 PM »

Wooty woot!

Also looking at 36mm carbs.

Petrus Rocks · « **Reply #15 on:** January 19, 2019, 10:55:46 AM »

Got the forks From CColi-excellent!

I will post the swap when I get to it.

poppe · « **Reply #16 on:** May 18, 2020, 12:25:13 AM »

Quote from: Petrus Rocks on January 19, 2019, 10:55:46 AM

Got the forks From CColi-excellent! I will post the swap when I get to it.

Did. You ever finish this?

motogoro · « **Reply #17 on:** April 08, 2021, 10:06:06 PM »

I’d like to know how much is involved in doing a 45mm fork swap?

Don G · « **Reply #18 on:** April 09, 2021, 08:45:42 AM »

The EV triples have a way longer steering stem likely, that will have to be dealt with somehow. DonG

Antietam Classic Cycle · « **Reply #19 on:** April 09, 2021, 08:54:07 AM »

Quote from: Don G on April 09, 2021, 08:45:42 AM

The EV triples have a way longer steering stem likely, that will have to be dealt with somehow. DonG

Both the Cal II and EV have frames with the tall steering head.

Don G · « **Reply #20 on:** April 09, 2021, 09:02:40 AM »

Well then bolt up should be straight forward. Steering stop issues may arise? DonG

ozarquebus · « **Reply #21 on:** April 09, 2021, 09:19:05 AM »

Q1: I would like to know what what parts have been used in a successful 16" to 18" wheel conversion for a 1000 SPII. I put this in here because I have heard a fork swap may go along with that.

Q2: Also, in doing a GSXR fork swap to a Tonti. Which triple trees and steering head shaft are used? This would be for a Convert with bad forks and brakes.

motogoro · « **Reply #22 on:** April 09, 2021, 09:54:01 AM »

Quote from: Antietam Classic Cycle on April 09, 2021, 08:54:07 AM

Both the Cal II and EV have frames with the tall steering head.

So,... an EV 45mm would bolt up to a Cal III frame with little modification?

Which leads to a tangent. Steering head angles? A. T3/G5 head angle the same as a Cal III? B. LMIV the same as the Cal III?

F-Fred · « **Reply #23 on:** April 09, 2021, 10:07:44 AM »

I put a 1999-era White Power USD fork on a tall-neck Tonti frame (1980s T5 I think). The fork came with undrilled clamps so we pressed the OEM stem in. As yet unridden.

I think all Tontis have the same steering angle.

I may end up having to have custom triples made if the steering lock is insufficient.

17" wheel, Ducati axle and bearings and some caliper spacers:

News:

Author Topic: Guzzi fork swaps (Read 5192 times)

Wildguzzi.com

Rough Edge racing

F-Fred