gear change on autos

now i dont remember my aerox ever feeling like it jumped from first to second gear, i also dont remember my brothers nrg doing this either.

Basically my aerox 100 has no pull til around 20, it then shoots off to 40-43 where it changes into second and the revs drop right off.

I have ordered a stiffer contra spring as the bike dosent change down when on a hill etc like it should. but what i wanted to know was is this second gear jump normal?

having watched many videos on youtube none of them seem to jump into second like mine does and drop the revs so dramatically. where talking first gear will hit 9k, then shift into second dropping the revs to 6k leaving me with a dead power zone from 40 to 50 before it then picks up and pulls to 60

any help or advice?

Edit- you can hear the gear change at around 27 seconds in the video below

I realise for those reading that their arent physical gears in my auto, but the bike seems to have a large jump between the first gear ratio and the second? not one smooth flow through the bikes full speed

 

There isnt really a first and second gear, its more of one big flexible gear/endless slightly different gears as the variator and clutch open and close.

My aerox was doing this, i bought a performance variator and its great, the revs stay up all the time

 

worn or too heavy rollers !!!!!

 

hmm, the rollers are a mear 6.3 grams roughly (3x6 3x6.5)

i tried 6 grams all round and it seemed to over rev in first and then when it finnaly got into second it again dropped revs drastically

 

does it have a standard exhaust?

sports exhausts require lighter rollers due to the power being at a higher rpm

 

Current spec of the bike is

leo vince zx pipe (came with 7.7 gr rollers which seemed to heavy when tried)
Kevlar polini belt
3x 6gr 3 x 6.5gr rollers
Carb upjetted from 76 to 86 (looking to find an 84 and an 82 as i think its too tich)
Stiffer clutch springs

 

i think its the variator rollers that cause this problem... :/ maybe try adjusting the air of the carb aswell??

 

You mean where the revs drop suddenly at 27 secs?

Yes very odd.

I think the roller weight is nearly fine - as i said Tecnigas recommended 6g with the RSII i owned. You've got similar so it should be fine with your ZX.

If it was belt slip or the clutch the revs would jump not drop.

I'd say its a fuelling issue maybe.

What happens if you accelerate gradually using 75-85 % throttle (i.e. not WOT)?

 

your scooter doesnt have a gearbox jesus christ mate go on google or howstuffworks and learn what a CVT is

 

really arent a bright spark are you fella? get out of my thread you spammer

 

It could be fueling, its running an 86 jet over the stock 76 which is just over the 10% increase. The plug is very oily when i take it out so im pretty sure its running rich, I was thinking to myself that maybe its where the bike shifts over from the small het to the main. but that dosent ring true as the bike revs out to 9k before the revs dramatically drop off and then have to crawl back up.

im trying to get hold of a few hets for the stock carb which isnt prooving easy.

 

quick question, if i was to alter the mixture screw out to lean the mixture, what would i do it by? an 8th of a turn, half a turn? just to give it a try see if it helps at all

i have my new contra spring here ready to install aswell

 

1/4 a turn at a time but...

The mixture screw you're on about only controls the idle mixture/idle speed - in short its not going to help the issue you have.

Once you're on part throttle the mixture is determined by needle/clip position then by main jet only on full throttle.

 

well that saves me fiddling with that bud cheers

will get this contra spring in and then see if i have to find smaller jets or a new carb as its very annoying having such dead spots

 

check the rear pully

i remember reading a guys aerox 100 tune up and his rear pully was shagged and gave a flat spot

 

yer i have sen that thread, its on my list too do. The last time we checked the rear pulley seemed a bit notchy and wasnt smooth i must say

 

what are you talking about? im hardly spamming, you are the one talking shit mate. it doesnt have a gearbox with seperate speeds like a car. it doesnt "change into second". it has a continously variable transmission. thinking an auto ped has a gearbox wtf, idiot.

http://en.wikipedia.org/wiki/Continuously_variable_transmission


anyway maybe your rollers are worn. have you even bothered checking yet?

 

i know how a cvt works, i know their is no physical gears, i know about rollers. Im not even interested in talking too you even if you know the cause to my issue, simply dont post in my thread

 

why ask then ...he just trying to help

 

i didnt see any help in either his first or second post, merely rude comments?

very happy to hear others opinions on the matter. Today i have taken apart the torque drive like sketchytom said and true to form the grooves are well and truely worn out, so much so their is a massive lip on the groove towards the end where the old worn thin belt must have been topping out.

i am now on the hunt for a torque pulley, do i need to buy both halfs new or can i just replace the side with the grooves?