HELP can i have a gear up kit with these mods?

hi so i have recently bought a nrg and i am putting on the following:
airsal sport 70cc cylinder kit
107mm evoloution racing adjustable clutch
a 17.5 mm carb
and i have a leo vince tt exhaust
now my question is will a gear up kit work with these mods and if so which one to get or do they all do the same thing?

 

The nrg should already have a 17.5mm carb on it???
The primary function of the gear-up kits is to reduce the gearbox revolutions, so when you do these mods you don't over-rev the gear-box.
It won't get you much more speed.

 

What he said☝

 

I dont really get that.. It doesnt matter if you change primary or secondary parts, its the ratio in the end that matters. Actually i thought that the low reving sports kits is most important of all to have a gear up kit because you are very quickly completely out of the powerband over 45mph without one

 

Rubbish, ive just fitted stage 6 crank, piston kit,exhaust etc to a zip (70)kit with standard 17.5mm carb upjetted and it went through a speed warning sign at 74mph on standard gears, thats about the limit for standard gears!

Gear up kits are only any use for racing or if you intend to rev over 15000 rpm!

 

A sport cylinder cannot give that
kind of speed! That's rubbish!

High reving cylinders also got benefits with gear up, but also mild sports kit like malossi or polini sport because of the short powerband.

Lets take aerox for example, with a 70cc mild sport kit the engine do almost 11,000 rpm at 50mph and making around 6hp, and that is way down on peak power on a sport kit. If you then put on a gear up you're having 9hp available right up to almost 55 mph @ about 9000rpm whereas without the gear kit we're down to 6hp and falling very fast at just 45mph. It really doesn't mean that the top speed will increase much, but in most circumstances you will get more acceleration(get it faster up to topspeed)

Maby there is different on the piaggio zip because of the bigger diameter on the variator and torque drive.
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Well ive followed him doing 74mph in my car and clocked with audi speedo and satnav as well as seen the speed on the speed sign so if you want to put a decent wager down i will go to the trouble of videoing it for you, by the way there are quite a few zips around here that all go beyond 70mph!

 

And what kind of cylinder are you talking about then?

 

All stage 6 , which actually is a barrel made by athena but with less port work and a piston made by someone else.

Also you say have 6hp on standard gears but if you add a gear up kit you get 9 hp??? If you add a gear up kit to a ped that struggles to 50 mph then by adding a gear up kit you will numb it, NRG,s have zip gears but they have 13 inch wheels (zip has 10 inch) so straight away the aspect ratio is greater, a good nrg with a good kit will go over 80mph before it reaches the end of the gear ratio, zips are maxing gears out at 76mph . No use adding a gear up kit unless you have the power to pull it and if you only get 50/55mph out of a 70 kit then your going to struggle.

I have 2012 nrg frame log book and wheels in my shed which my son crashed ages ago and it was much faster than his zip , both had identical engine mods but the NRG was much faster top end ,zip had quicker acceleration, both were stage 6.

 

First, i dont think you understand that i talking about those mild 70cc sport kits like malossi and polini sport, and the gears of an aerox engine.

A scooter can only hold the revs until the variator is fully changed out, it happens at 45mph with standard aerox gears. It is impossible to exceed 45mph on a standard Aerox without the engine revs exceeding 9,000rpm that is about the peak power for a sport kit. @ 9,000 rpm the engine with a sport kit produce about 9 hp. What do you think happens when the engine revs exceeding 9,000 rpm?? The power quickly dropped off as the revs start to exceed 9,000rpm and you will not longer stay in the peak power, because this mild sport cylinders have such a short power band.
As I mentioned earlier, at 50 mph the engine is doing almost 11,000 rpm and produce about 6hp. If you have a gear up you will have 50-55 mph @ 9,000 rpm and still have those 9hp available. Are you with me?

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This topic is not about aerox its about an nrg!