Smallframe suspension
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Hooked
1964 v90, 1970 VBC, lots of dumb twist n go toys
Joined: 21 Jan 2015
Posts: 220
Location: savannh, ga
Wed Dec 26, 2018 8:58 pm quote
Been letting stuff sidetrack me from working on my Vespas... back to riding the v90 regularly now and have gotten interested in what upgrades folks do on their suspension on fast bikes. Reducing brake dive, anything to make the ride slightly less terrifying at speed.
Hooked
50 N
Joined: 20 Dec 2015
Posts: 227
Location: North Aberdeenshire
Sat Dec 29, 2018 5:27 am quote
Crimaz anti dive link extension and a decent shock like a YSS. Of course if you want to spend more money on say a BGM, Bitubo or Malossi so much the better.
Hooked
1964 v90, 1970 VBC, lots of dumb twist n go toys
Joined: 21 Jan 2015
Posts: 220
Location: savannh, ga
Thu Jan 10, 2019 10:35 am quote
Iíve already got better than stock shocks, I think, lol. Front is whatever the red ones Mercato sells, rear is a blue one I found in a friendís pile. I know I need to do my swingarm bushes, too much motion there for stabilityís sake.

Anti dive rigs interest me, I just canít figure out quite how they achieve it so itís hard for me to get my head around.
Hooked
50 N
Joined: 20 Dec 2015
Posts: 227
Location: North Aberdeenshire
Sat Jan 12, 2019 9:20 am quote
Basically it lengthens the trail and pushes the forces through 3 points rather than the original 2. If you look around the Internet I'm sure you can find a more scientific explaination and some photos or videos of it in action.


https://www.sip-scootershop.com/en/products/adaptor+shock+absorber+crimaz+_30018100
Ossessionato
1976 Super (x 2), 1974 Primavera (x 2), 2006 Fly 150
Joined: 26 Sep 2013
Posts: 4284
Location: So Cal
Sat Jan 12, 2019 10:15 am quote
The Crimaz is a good upgrade... really tightens up the front end.
Hooked
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 488
Location: S.Salem, NY
Sat Jan 12, 2019 1:55 pm quote
Quote : Allows you to move the lower attachment of the front shock absorber, making it integral to the wheel axis. Improving the braking performance and sporty driving style, with greater stability and road holding, and eliminating the classic sinking that you have with the original fork.
Hooked
1964 v90, 1970 VBC, lots of dumb twist n go toys
Joined: 21 Jan 2015
Posts: 220
Location: savannh, ga
Mon Jan 14, 2019 1:42 pm quote
Looking at pictures I canít figure out how itís doing anything more than increasing the effective spring rate by giving the shock assembly a longer lever to work against.
Molto Verboso
1979 P150X, 1983 P200E, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1211
Location: Veria, Greece
Mon Jan 14, 2019 2:08 pm quote
Here's a video (videos don't work with Chrome)...

Hooked
'64 Motovespa 150S (177) , '76 V90 ( 133)
Joined: 27 Mar 2013
Posts: 488
Location: S.Salem, NY
Mon Jan 14, 2019 2:23 pm quote
clunk?
Is the link moving when it reaches the top ?
Hooked
1964 v90, 1970 VBC, lots of dumb twist n go toys
Joined: 21 Jan 2015
Posts: 220
Location: savannh, ga
Tue Jan 15, 2019 10:13 am quote
Re: clunk?
Moto64 wrote:
Is the link moving when it reaches the top ?
I think the clunk you hear is just the brake being released.


So it moves the shock in line with the axle. Just moving it backwards increases the effective spring rate. Iím thinking that the change in position is also making the swingarm less likely to react to twisting forces from the brakes because the shock is now at the center. Am I interpreting whatís happening there correctly?
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