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: 264
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: 264
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: 4673
Location: So Cal
Sat Jan 12, 2019 10:15 am quote
The Crimaz is a good upgrade... really tightens up the front end.
Addicted
'64 Motovespa 150S (177) , '64 V90
Joined: 27 Mar 2013
Posts: 547
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, 1987 T5, 1996 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 1466
Location: Veria, Greece
Mon Jan 14, 2019 2:08 pm quote
Here's a video (videos don't work with Chrome)...

Addicted
'64 Motovespa 150S (177) , '64 V90
Joined: 27 Mar 2013
Posts: 547
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?
Member
'81 Special, '78 P150X, '13 LML Star 200
Joined: 30 Nov 2018
Posts: 40
Location: Ukraine
Wed Mar 20, 2019 3:14 pm quote
Is Crimaz Anti-Dive Link makes the front suspension stiffer or only reduces diving?
And is this link compatible with the speedometer drive gear?
Molto Verboso
Joined: 24 Jan 2008
Posts: 1906
Location: Santa Margarita,Ca.
Thu Mar 21, 2019 12:59 am quote
roland87 wrote:
Is Crimaz Anti-Dive Link makes the front suspension stiffer or only reduces diving?
And is this link compatible with the speedometer drive gear?
Stiffer. Compatable with speedo drive.
Member
'81 Special, '78 P150X, '13 LML Star 200
Joined: 30 Nov 2018
Posts: 40
Location: Ukraine
Thu Mar 21, 2019 3:51 am quote
Thanks a lot!
Hooked
1974 Vespa Primavera 125, 1980 Bajaj Chetak
Joined: 07 Jul 2017
Posts: 378
Location: Boston, MA
Mon Mar 25, 2019 6:59 am quote
I actually installed the anti-dive bracket last year and plan to remove it this year. It does eliminate the dive, and may be great for a race bike, but I recommend against it on a daily rider anyplace that has bad roads. The stiffer suspension makes those road bumps and holes (even small ones) much rougher and I have almost gotten thrown from my smallframe a few times just hitting small bumps.

Last edited by Bazziemoto on Mon Mar 25, 2019 9:33 am; edited 1 time in total
Molto Verboso
Joined: 26 Oct 2015
Posts: 1462

Mon Mar 25, 2019 8:11 am quote
Bazziemoto wrote:
I actually installed the anti-dive bracket last year and plant to remove it this year. It does eliminate the dive, and may be great for a race bike, but I recommend against it on a daily rider anyplace that has bad roads. The stiffer suspension makes those road bumps and holes (even small ones) much rougher and I have almost gotten thrown from my smallframe a few times just hitting small bumps.
Did you have a stock or aftermarket damper that you were using with the anti-dive?
Hooked
1974 Vespa Primavera 125, 1980 Bajaj Chetak
Joined: 07 Jul 2017
Posts: 378
Location: Boston, MA
Mon Mar 25, 2019 9:36 am quote
whodatschrome wrote:
Did you have a stock or aftermarket damper that you were using with the anti-dive?
It has an aftermarket Carbone shock, which was adjusted to the softest setting when the anti-dive bracket was installed.
Molto Verboso
Joined: 26 Oct 2015
Posts: 1462

Mon Mar 25, 2019 1:07 pm quote
Bazziemoto wrote:
whodatschrome wrote:
Did you have a stock or aftermarket damper that you were using with the anti-dive?
It has an aftermarket Carbone shock, which was adjusted to the softest setting when the anti-dive bracket was installed.
I've disliked most aftermarket "race" dampers/shocks that i've ever used. Even most of the touring ones i didn't like as well. Currently all of my scooters have either a PX or PKXL fork (they don't dive as much as the older stlye forks), but i have never ever liked how the race shocks rode on an actual road. I just installed a YSS front shock on my PKXL, and it's waaay to stiff for riding on any public road. I'm thinking about reinstalling my stock damper back on. The only reason i installed that YSS shock was because i recently converted to a front disc brake assembly, and i was concerned about brake dive.

I raced scooters for four seasons on tracks. I happened to use Bitubos at the time. I wasn't really a fan of them, unless the track was COMPLETELY smooth. Any ripples in the tarmac, and it felt like the front tire was skipping. I think manufactures just need to build a damper unit that has a spring that's just a smidge heavier than stock. Or maybe the problem is just me? I bet if i carried another 50lbs or so on the scoot, i wouldn't complain as much about a harsh ride.
Member
'81 Special, '78 P150X, '13 LML Star 200
Joined: 30 Nov 2018
Posts: 40
Location: Ukraine
Mon Mar 25, 2019 3:12 pm quote
Interesting information... I have a YSS X-pro on front & rear on my 50 Special and seriously thought about install Crimaz kit. 60% of our city roads are in bad condition
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