Suzuki spring rates?
 

:smt051Hi does anyone have access to spring rates.
Im struggling to get the front end set up on my curvy 650.
Ive fitted a set of good forks from an early gsx teapot that I always regarded as handling well,
This mod has given me 4 pot calipers and adjustable damping, however the handling on the sv is as poor over bumps as always.
ive tried standard sv springs, standard gsx600f springs and ive now fitted gsxr1100 slabby springs.
The problem i have is not tracking over bumps,the bike is fine as long as the throttle is pinned,but the only way to steady things up on partial throttle is to drag the rear brake.
Does anyone know what the spring rates are for the 3 springs ive tried so far as they feel pretty much the same.
The gsxr springs are fitted at the moment as they are full length and progressive but no real improvement.

Re: spring rates?
 

Soft as sh*te.

How much do you weigh?

Re: spring rates?
 

90kgs 14st forgot to mention rear end is jacked high,so i can stay on the throttle.(bike feels much safer when throttle is wide open officer)
ive made some spacers to preload gsxr1100 springs so that static sag is somewhere about right.
Handling is still ****e though,choppy and forks still bottom out on brakes.

Re: Suzuki spring rates?
 

How have you jacked it up? Proper way to do it is with longer shock. (preferably it should say penske on the side of it)

As you say this sorts the anti-squat geometry out, however if you do it with raising links you'll naff the linkage curves up, the stock curvy one is a really nice linear link so it's better off left unf*ckedwith.

What have you done with the teapot dampers? IIRC (it's been a while...) they are some recirc type KYB cartridges?


14st just buy some Ktech 0.9s.

Re: Suzuki spring rates?
 

longer shock (ohlins) and shorter dogbones, problem with front has always been there though.
I can at least get the front end back on line now when it kicks out.
I used to get pushed wide.Now i can correct my line with a bit of back brake

Re: Suzuki spring rates?
 

I ordered some K-tech,but they said they were out of stock,4 week wait ,after trying out the slabby springs Im starting to think 0.9 wont be enough.
I thought the GSXR11 being a bit heavier would have stronger springs
Maybe the sv especially jacked up carries more weight over the front than imagined.????

Re: Suzuki spring rates?
 

Depends what height. You want about 13 7/8 > 14" shock length and stock dogbones ideally. Ohlins doesn't go out that far without longer clevis.
That doesn't give any particular problems with too heavy front, even with inch shorter SRAD forks on.

No they did a crap job choosing spring rates, the slabby 750 had like .59s or something ridiculous and that stupid anti dive thing to try compensate. Dunno about 1100.


You can also get running wide problems from rear, you blow through all travel at back, which rakes forks out and it feels like it doesn't want to stay on line. Especially worse with progressive linkages and a soft spring, what have you got on back?

Re: Suzuki spring rates?
 

Are the Teapot forks the right length? If they are shorter than the SV one, then coupled with the jacked up rear end the rake might be getting a bit low which won't do stability any favours.

Re: Suzuki spring rates?
 

teapot forks are a bit longer.
Ive slipped them through yokes so they sit the same as standard
racetec dont seem to have standard slabby fork rates published.
I have never had a problem with the slabby front end,despite running pfm discs and uprated calipers stability has been great,especially on turn in with brakes on, thats why i thought them springs would improve the SV
The rear shock was always the problem with the early gsxr11.
I fitted an EMC shock to the slabby in short order.
The anti dive system must work,because it definately aint the springs.:confused:

Re: Suzuki spring rates?
 

:confused:bike doesnt run wide,it gets kicked wide over bumps,must be bottoming out,always been like it from new
My original thoughts was a damping issue but i think ive got that pretty close and have some adjustment available with these forks.
everything ive done has helped slightly but not cured.
original problem persists.
Those early oil cooled lumps are pretty hefty,its strange if they run similar spring rates to a light weight V twin.:(