Top speed on a set of 9:1 gears.

DorkoElite303 · Post by **DorkoElite303** » Sun Oct 05, 2008 7:26 pm

Is anyone running a set of 9:1 gears on a big bore set-up? I want to know what the top speed your hitting.

tru72 · Post by **tru72** » Sun Oct 05, 2008 8:25 pm

had that in my drag bike.. 117cc 70 mph in the 1/8 LOL

DorkoElite303 · Post by **DorkoElite303** » Sun Oct 05, 2008 8:31 pm

Why don't you put the 7:1 or even the 6:1 in the drag bike? Don't you think you would get a better Top end? you probably looking for the take off huh???

veedubh20 · Post by **veedubh20** » Sun Oct 05, 2008 8:44 pm

9:1 , dd50 motor/ contesta bore not port, pg long, ct,28mm carb. little over 70 mph. w/110lb

DorkoElite303 · Post by **DorkoElite303** » Sun Oct 05, 2008 8:49 pm

veedubh20 wrote:9:1 , dd50 motor/ contesta bore not port, pg long, ct,28mm carb. little over 70 mph. w/110lb

Sounds good. When you get on the throttle does it just want to wheelie?

veedubh20 · Post by **veedubh20** » Sun Oct 05, 2008 11:18 pm

DorkoElite303 wrote:
veedubh20 wrote:9:1 , dd50 motor/ contesta bore not port, pg long, ct,28mm carb. little over 70 mph. w/110lb
Sounds good. When you get on the throttle does it just want to wheelie?

not really, well 9:1 does have good take speed.

both rear spring are 1500. center/shoes. the guessing roller around 45grams. If you are heavy than me , need to back off some grams roller.

burnt_toast · Post by **burnt_toast** » Mon Oct 06, 2008 12:32 am

DorkoElite303 wrote:Why don't you put the 7:1 or even the 6:1 in the drag bike? Don't you think you would get a better Top end? you probably looking for the take off huh???

he's racing 1/8th mi.. I would take 9:1 over 7 for such a short stretch too, keep the revs up at launch and all the way

7-8.5:1 might be better for 1/4mi though

DorkoElite303 · Post by **DorkoElite303** » Mon Oct 06, 2008 1:43 am

I see i see. I think my next build is going to be a torque monster. I want something that will climb a hill at 50mph and pop wheelies at cruising speed. Any suggestions? i'm running 9:1 gears already in a stock elite. But I'm think corsa 72 with a race pipe?

tru72 · Post by **tru72** » Mon Oct 06, 2008 2:09 am

well you have to remember that a small motor has more rev than torque. you might use more like 8.5 /8 :1. I feel that 9:1 is a bit revvy, but then again its al up to you!
aloha
D