Honda Spree and Elite 50 Forums

I have seen some heavy modded scoots with open rear crankcase covers - is this to incorporate 9:1 gears?

yup you can put 9:1 gears in stock bike vtcycles

the hole thing with the back of the belt case being taken off is just perferece.

Open- belt stays cooler, looks kinda cool with the clutch spining like crazy. Its neat, i took mine off for a while and loved the way it looked.

Closed- Everything stays the same as it would stock. As much as i love the open belt case i had to keep mine closed because i have to drive down a dirt street to get to work, and i dont want dirt and rocks up in there.
I have also heard that if you get stuck in the rail the clutch wont grab.

It really comes down to if you want it on or not. The only reason someone would have to have it off is if they built like a huge 125cc stocker motor and went with some HUGE clutch. But thats clearly not the case here.

Elite-ist wrote:I have seen some heavy modded scoots with open rear crankcase covers - is this to incorporate 9:1 gears?

allow me to also point out some general info here.
9:1 is a ratio.
The clutch turns 9 times to every one tire turn.

Not everyone who changes there gears does 9:1. People who build up 72cc bikes might go with 8.44:1 gears, or even 7:1 if they want more topend. Even bigger motors yet (like 100cc+) might go as low as 5:1 gears.

9:1 works best for stock bikes. Thats why everyone says to get those. In theory, you could put like 5:1 gears in a stock bike, the take off would be super weak, but in theory it should get great top speeds. The reason no one does that is because we have already found out that 9:1 gears give the best overall performance.

If you dont understand any of this feel free to ask.

Elite-ist wrote:I have seen some heavy modded scoots with open rear crankcase covers - is this to incorporate 9:1 gears?

No its to keep the clutch and belt cooler.

Thanks for all the comments - I want to put in 9:1s but it HAS to still look stock if you know what I mean. Looks like that isn't going to be a problem for what you guys tell me.

Dac wrote:

Elite-ist wrote:I have seen some heavy modded scoots with open rear crankcase covers - is this to incorporate 9:1 gears?

allow me to also point out some general info here.
9:1 is a ratio.
The clutch turns 9 times to every one tire turn.

Not everyone who changes there gears does 9:1. People who build up 72cc bikes might go with 8.44:1 gears, or even 7:1 if they want more topend. Even bigger motors yet (like 100cc+) might go as low as 5:1 gears.

9:1 works best for stock bikes. Thats why everyone says to get those. In theory, you could put like 5:1 gears in a stock bike, the take off would be super weak, but in theory it should get great top speeds. The reason no one does that is because we have already found out that 9:1 gears give the best overall performance.

If you dont understand any of this feel free to ask.

What ratio are the stock gears?

12s I think, but you can run any gears with the rear belt cover on.

Kenny_McCormic wrote:12s I think, but you can run any gears with the rear belt cover on.

12.6:1 or 12.4:1 i cant remember.

But yeah, gears are inside the motor.
they dont change the look of anything.