gear up

[Deleted]

what i said isnt the final drive ratio i guess so my logic is not sound lol no big surprise there lol

[Deleted]

49ccscoot.proboards.com/index.cgi?board=transtech&action=display&thread=404

didnt he mean to say 'stock is 51/15?

[90GTVert]

Here's my experience with the Naraku's from the how-to on my SunL...
49ccscoot.proboards.com/index.cgi?board=builds&action=display&thread=20&page=36

[bigkahuna427]

Mar 3, 2012 9:13:26 GMT -5 stroker said:

enviromoto.ecrater.com/p/5506961/naraku-performance-gear-set-52-14-139qmb

'Works best with stock engine, otherwise little gains will be had.'


Shouldnt that say 'little gains will be had on a stock engine'?

All depends on what you are looking to gain the higher (numerically) the ratio the quicker acceleration. The lower (numerically) the lower the rpms will be at the same cruising speed. You may be able to achieve higher speeds if you are developing enough torque from the engine in it's upper RPMs.

So, in in 90GTVert's example above his Venus may actually achieve a higher speed with the ATV gears but he won't have the wheelie machine he has now!

[Deleted]

49ccscoot.proboards.com/index.cgi?board=transtech&action=display&thread=404

didnt he mean to say 'stock is 51/15?

[90GTVert]

Mine stock were 52/15.

[Deleted]

I would like to try 17/49 but i cant find them anywhere.

[Deleted]

Another thing on my mind is I dont know what the gearing is in the long case engine here is that was using a 13" wheel but seems to me since it was a stock 50cc engine it will be geared higher than a motor with a 10" wheel in order to turn that big wheel. I am thinking that I can possibly put the gears I have here that were for a 10" wheel and put them in the motor that was setup to turn a 13" wheel and have a much higher top speed/lower rpm and not have to buy gears.

[Deleted]

Mar 3, 2012 10:00:26 GMT -5 90GTVert said:

Here's my experience with the Naraku's from the how-to on my SunL...
49ccscoot.proboards.com/index.cgi?board=builds&action=display&thread=20&page=36

could it be that the engine was not powerful enough to turn the new gears with the load applied and therefore was slower?

[jmkjr72]

here is the thing the rim size proably doesnt play much in the gear ratio
her is why they run a diffrent profile tire on the diffrent size rims
well that is on the same case sizes
take the hm engine in long case for 10s the run 130/90 10 for 12 a 130/70 12 and for 13 130/60 13 so all the tires are almost the same

[Deleted]

Mar 3, 2012 11:33:56 GMT -5 jmkjr72 said:

here is the thing the rim size proably doesnt play much in the gear ratio
her is why they run a diffrent profile tire on the diffrent size rims
well that is on the same case sizes
take the hm engine in long case for 10s the run 130/90 10 for 12 a 130/70 12 and for 13 130/60 13 so all the tires are almost the same

that is not the sizes I am dealing with

I am using 90/90-10 and 130/60-13 i seriously doubt these 2 stock 50cc motors have the same gear.

Attachments:

[90GTVert]

Mar 3, 2012 11:00:01 GMT -5 stroker said:

Mar 3, 2012 10:00:26 GMT -5 90GTVert said:

Here's my experience with the Naraku's from the how-to on my SunL...
49ccscoot.proboards.com/index.cgi?board=builds&action=display&thread=20&page=36

could it be that the engine was not powerful enough to turn the new gears with the load applied and therefore was slower?

Absolutely not. I understand how gears work and they are definitely deeper gears, a numerically higher ratio. I had the power to pull the stock gears that were numerically lower in ratio. Besides, if all the numbers and what not doesn't make sense, the thing took off harder, felt more likely to wheelie (with help) and was always revved higher to achieve the same speeds. Definitely gear ratio limited and not power limited. Even with stock gears I never had a light friend go any faster than I did.

[Deleted]

Mar 3, 2012 12:27:34 GMT -5 90GTVert said:

Mar 3, 2012 11:00:01 GMT -5 stroker said:

could it be that the engine was not powerful enough to turn the new gears with the load applied and therefore was slower?

Absolutely not. I understand how gears work and they are definitely deeper gears, a numerically higher ratio. I had the power to pull the stock gears that were numerically lower in ratio. Besides, if all the numbers and what not doesn't make sense, the thing took off harder, felt more likely to wheelie (with help) and was always revved higher to achieve the same speeds. Definitely gear ratio limited and not power limited. Even with stock gears I never had a light friend go any faster than I did.

Interesting. Gearing on these seems to be a complicated issue.

[Deleted]

out of the 3 Parts For Scooters has i still dont know which to try

the 16/42 is the highest combination but still seems pretty low at 2.62

[Deleted]

Mar 3, 2012 12:27:34 GMT -5 90GTVert said:

Mar 3, 2012 11:00:01 GMT -5 stroker said:

could it be that the engine was not powerful enough to turn the new gears with the load applied and therefore was slower?

Absolutely not. I understand how gears work and they are definitely deeper gears, a numerically higher ratio. I had the power to pull the stock gears that were numerically lower in ratio. Besides, if all the numbers and what not doesn't make sense, the thing took off harder, felt more likely to wheelie (with help) and was always revved higher to achieve the same speeds. Definitely gear ratio limited and not power limited. Even with stock gears I never had a light friend go any faster than I did.

You tried a taller tire on that motor once right? what did that do for it?