9.4:1 vs. 8.4:1 vs 7.5:1 vs 7:1

maddog · Post by **maddog** » Thu Jul 17, 2008 5:38 am

you dial in the trans according to your riding style and your weight, if you go lite on the trans you will not have to change certain parts all the time.

MIKEBB · Post by **MIKEBB** » Thu Jul 17, 2008 8:42 am

Where do you get 4k clutch spring and how much?

Karman · Post by **Karman** » Thu Jul 17, 2008 9:45 am

MIKEBB wrote:Where do you get 4k clutch spring and how much?

VT Cycles. I think they're $16. Tell Keoni you want yellow clutch springs (4,000 rpm). They'll make a scoot with some power into a neck snapper. They basically skip the lower part of the power band and just rev through it. Keep in mind - they're a MAJOR pita to install because they're so tight.

MIKEBB · Post by **MIKEBB** » Thu Jul 17, 2008 10:12 am

Karman

what is your set up and what is your top speed?

MIKEBB · Post by **MIKEBB** » Thu Jul 17, 2008 10:18 am

oopss. What I meant is, do you have 4k spring now? I have 1500 rpm.

Karman · Post by **Karman** » Thu Jul 17, 2008 5:08 pm

MIKEBB wrote:oopss. What I meant is, do you have 4k spring now? I have 1500 rpm.

You might be getting the clutch springs (there are 3) confused with the compression spring. I installed the 4,000 rpm clutch springs and a 1,500 compression spring at the same time. I didn't like the clutch springs (no low speed throttle) so I went back to stock but kept the 1,500 compression spring.

MIKEBB · Post by **MIKEBB** » Fri Jul 18, 2008 8:30 am

Karman wrote:
MIKEBB wrote:oopss. What I meant is, do you have 4k spring now? I have 1500 rpm.
You might be getting the clutch springs (there are 3) confused with the compression spring. I installed the 4,000 rpm clutch springs and a 1,500 compression spring at the same time. I didn't like the clutch springs (no low speed throttle) so I went back to stock but kept the 1,500 compression spring.

I'll try that set up. Hopefully I have a better take off. Did you also change the jet in the carb?

Karman · Post by **Karman** » Fri Jul 18, 2008 1:14 pm

No - there's no need to rejet. You're just changing the take-off and tweaking when the clutch engages by swapping out the springs. The part of the powerband that is usually slow with stock springs is just skipped (you rev through it) with the stiffer springs.

PimpinSpree · Post by **PimpinSpree** » Sat Jul 19, 2008 1:37 pm

how fast do you think i could go with a contessa big bore and 8.4:1 gears?

Kenny_McCormic · Post by **Kenny_McCormic** » Sat Jul 19, 2008 1:42 pm

PimpinSpree wrote:how fast do you think i could go with a contessa big bore and 8.4:1 gears?

with a high speed pully and some tuning you will be in the 60s, MAYBE low 70s.

PimpinSpree · Post by **PimpinSpree** » Mon Jul 21, 2008 1:42 am

how about with 9.1:1? i want to get my se50 spree to cruise easily at 50

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jul 21, 2008 2:40 am

You could cruise at 50 no problem, cruise is well below top speed. With 9s you would just be making more noise and wasting gas.

PimpinSpree · Post by **PimpinSpree** » Mon Jul 21, 2008 10:03 am

well i don't care about my top speed being around 50, i probably won't even go that fast, i just want the option. I'll do most of my driving at 35 or so. So anyone know how fast 9.1 gears get you on a bored scooter?

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jul 21, 2008 12:31 pm

PimpinSpree wrote:well i don't care about my top speed being around 50, i probably won't even go that fast, i just want the option. I'll do most of my driving at 35 or so. So anyone know how fast 9.1 gears get you on a bored scooter?

You shouldnt run them because they will wear out the bore quicker. Lower gearing=higher RPM for same speed.

cf_z · Post by **cf_z** » Mon Jul 21, 2008 3:40 pm

well i got them today.

he got my 8.4 prefference in before he shipped.

does anyone know what 8.4 can cruise easily at without stressing the motor? (corsa)