Upgrading to 70cc, new jet or carb too?

[Malformed]

well, i didnt add oil when i was suposed to.
during the day i cant see the light and didnt even notice it was on.
when it started running rough i assumed it was the fuel/air mix.

when i figured out i was out of oil i filled it up right away and added some oil to the gas.
it runs better with oil, definitly. :p
but i fear the damage is done, because now i cant seem to get over 25mph
and it makes some awfull noises once and a while.
sounded like it was trying to spit the piston ring out the exhaust. :(

so. instead of replacing it with the stock 50cc parts i am going to go up to 70cc :D

the guy at the scooter & motorcycle repair shop said the 70cc is a great idea, but i will need a new jet for the carb.
he will pick up the scooter for $30 and do the work for $25 an hour.
i would normaly try to do it myself, but i dont have the proper tools.

my question is...
should i go ahead and get the "Stage Two Performance Upgrade - Vento" ?
It comes with an Airsal 70cc aluminum cylinder, Arreche 19mm carb with auto choke, and performance airbox.

i kinda planned on getting the exhaust, but its going to have to wait now.

[Lennox]

if you just rejet, youll be lean!

[Malformed]

forgot to mention,

i didnt do the stage 1 yet.
i was going to get the exhaust but i was told i didnt need the Variator

but now im wondering if the stock Variator will be ok with the 70cc upgrade and the 19mm carb.


do i need to change the Variator too?
how about the exhaust?
this is looking expensive.

[Lennox]

I can to the conclusion that the variator is waste of money. In my opinion, it is not nesesary. The only advantage is the ease of changing roller weights. If you have the right tools/equipment you can modify your stock one.

yes change the exhaust! You MUST use one designed for a 70cc!!

[Malformed]

the tuning section says i need to, but i just dont see why i would "need" to.

http://www.provoscooter.com/shop/howtotuning.php


i just dont want to spend the cash on the exhaust, variator & clutch springs if i dont have to.
i can allways get those parts some other time.

so would the stock one work fine without being modified?
im short on tools.

[Malformed]

well time is against me here so i choked, hiccuped, even farted a little...
and went ahead and ordered the stage one/two combo upgrade, with the variator & exhaust. i also ordered a replacement fan thing for the variator, since i allready broke one of the fins off.

going to have the local cycle & scooter shop come pick up the scooter when the parts get here.
i will have them do the work on it since i dont have the right tools.
not sure if i will have them do the variator and clutch springs too.
if not, i will probably do the variator and clutch springs before they come pick it up.
that way i can drive it home when the work is done.

i will have to get a estimate before they do the work.
they seem pretty resonable and well known around here.

[monzav8]

the tuning section says i need to, but i just dont see why i would "need" to.

http://www.provoscooter.com/shop/howtotuning.php


i just dont want to spend the cash on the exhaust, variator & clutch springs if i dont have to.
i can allways get those parts some other time.

so would the stock one work fine without being modified?
im short on tools.

You dont have to get the variator. Just buy some different size rollers. The stock variator is just fine. The only time you need to change it is when you change the belt to one that has a different pitch to the friction surface (as with the Malossi "Wide-Range" Pulley system.)

Also, you have to change out the carb. The stock one is probably 12mm and just cant flow enough to supply the 70cc kit. Even when jetted up the carb does not operate properly and you may lean it out (and ruin the new 70cc cyl and piston)...

[ncsk8er]

Ok...yes the variator change is a must.If you want to get the most out of your 70cc kit,changing the variator is a must.True you can modify your stock variator to get alot of bottom end,but that wont help you on the top end.The new variator has a different slope to the drive face,so you get about 7-10 mph more on the top end.Trust me,change it if you want an all around upgrade through the whole powerband.

[XPS1210]

I don't know about 7-10 mph... I put the stock variator on mine for giggles sake and my top is 43 now... So... When I get home from work... back to the other one...

hell, besides the off the line power the variator made the difference in my top end... all the other parts, just more power... not speed...

Also the stock variator is quieter, I swear the other one is louder!

[Lennox]

is much quieter!! I hate hearing "loose change" sound from the tranny, it really bothers me!!

[XPS1210]

Lennox, the noise your hearing... are you 100% it's from the tranny?

I thought that was from the tranny as well, then I decided to see if it was, never got it to go away... I then thought, change back to the 49cc set up and see...

Just changing the cylinder and piston out...

No more change rattle sound...

It's the piston on mine making that noise!

Might want to check and let me know if thats the noise your hearing...

Mine also has some shinny spots on the piston... not sure that it's supposed to be there... But with the rattle getting louder the more I ride... I think I'm gonna be getting a new 70cc kit soon...


Also my set up, loves to run lean... If I run it where the plug is the right color, then it likes to flood...

Kinda lost...

[Lennox]

the sound is definatly the rollers clanking around. I started it up with no vari to confirm.

Are the shiny spots on the top of the piston? If so this is piston wash, and means that you are running rich. The extra fuel "cleans" areas on the top of the piston.

[XPS1210]

nope, it's on the sides, more from 1/2 way down all the way to the bottom of the piston... No marks on the cylinder walls just the piston...

[Malformed]

I put the stock variator on mine for giggles sake and my top is 43 now...

im 6'1" tall 220lbs
i had my stock zip r3i scooter doing 45+ last week.
i had two 12 packs of soda/beer. one between my feet and the other crammed into the under seat compartment.

normaly 40-43 depending on wind.

im wondering what kind of top speed i can expect to see out of my scooter with the 70cc upgrade, 19mm carb with performance filter and crap, new variator, and technigas exhaust.
im just shooting for a stable and easy to acheive 45-50mph so anything over that is bonus.

[Malformed]

oh... and are the performance brake shoes realy worth the cash?
are they that much better than stock?
(my front brakes still dont work by the way.)

[Lennox]

Ok...yes the variator change is a must.If you want to get the most out of your 70cc kit,changing the variator is a must.The new variator has a different slope to the drive face,so you get about 7-10 mph more on the top end..
Thats funny, my stock vari, and techno vari have same slope??:confused: Did you measure, or are you guessing?

[XPS1210]

oh... and are the performance brake shoes realy worth the cash?
are they that much better than stock?
(my front brakes still dont work by the way.)


Can't say about the brake shoes as I got the wrong ones shipped to me and am waiting for the correct ones as we speak...

[ncsk8er]

Thats funny, my stock vari, and techno vari have same slope??:confused: Did you measure, or are you guessing?


No it has a different slope..I believe its smaller too.In height that is