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Post by wiscootsin on Feb 14, 2020 22:58:20 GMT -5
I got this kymco about a year ago and the only things I had done to it were: 1)cleaned it a lot 2)got the intake insulator from oldgeek 3)replace air filter 3)replace CDI with an unrestricted one after the original broke. 4)new battery (it already had a collar-free drive boss) It ran great all last summer for my wife. She doesn't really care how fast it goes so I left it. After my chinarelli broke down I drove it for a few weeks in August.
It would top out around 37-38 mph and at 8400 RPM.
Aside from that I was thinking of simple CVT tuning, new belt, sliders, etc. Should the stock variator be able to get more speed? Or, what is an inexpensive variator option thats worth using?
In another thread someone mentioned an ideal length for the stock drive boss, I believe being 37mm. So I could shave mine down to that possibly (I think mine is 38).
I put a new tire on the rear - both were original. I have a new 120/70 for the front and I'm planning to see if that'll fit on there (stock is listed and printed on the scoot as 110) - it seems that some of you have had success doing just that.
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Post by aeroxbud on Feb 15, 2020 4:46:18 GMT -5
A good variator will hold the revs more constantly. One give you an extra couple of miles an hour.
Always had good results with Polini, or Malossi.
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Post by Zino on Feb 15, 2020 11:19:58 GMT -5
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Post by SMALL CC TEK on Feb 15, 2020 14:08:16 GMT -5
The factory exhaust is so restrictive on the ZX . Down the road you might want to think about a upgrade and rejet but then comes more Variator tuning is mandatory . I had a TK with a smaller chamber for a 49 that worked nice.
You might want to make sure that exhaust is clean and not all carbon clogged that will kill any chance of hitting high 40's
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Post by wiscootsin on Feb 15, 2020 15:36:15 GMT -5
The factory exhaust is so restrictive on the ZX . Down the road you might want to think about a upgrade and rejet but then comes more Variator tuning is mandatory . I had a TK with a smaller chamber for a 49 that worked nice. You might want to make sure that exhaust is clean and not all carbon clogged that will kill any chance of hitting high 40's Yeah I was thinking I should clean the exhaust, good chance that it has some oil and crud in it. |
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Post by Zino on Feb 15, 2020 16:01:25 GMT -5
Some Guys burn it out with a Torch That is pretty dangerous .
A easy way to get it cleaned out is have your local radiator shop dip it in there solvent tank .
If it works it will let your rpms rise higher .
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Post by SMALL CC TEK on Feb 16, 2020 13:31:01 GMT -5
Some Guys burn it out with a Torch That is pretty dangerous . A easy way to get it cleaned out is have your local radiator shop dip it in there solvent tank . If it works it will let your rpms rise higher . Yep i have had guys come in attempting to burn it out ! Unless you have a expansion chamber already that is straight through it is extremely inefficient and if you have a stock exhaust your wasting your time because of all the chambers or cat inside you can't see . The solvent soak method works good on expansion chambers it's just messy and dangerous if you have small kids or pets around . The radiator shop or machine shop is the best last time i did it it was 15 bucks and worth every penny . I have done it with a hot power washer and straight purple power after i let it soak for a day or two corked up with a small ball and tape lol People for get how a clean pipe sends sound waves back properly and how much that effects your port timing ! 2 stroke not many parts inside yet extremely complicated powerful machine by design.. lol That's why they are so fun to work on ! |
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Post by Zino on Feb 16, 2020 13:53:28 GMT -5
I was shocked the first time I put back on the freshly cleaned pipe after the I got it back from the radiator shop dip tank.
Power was up on take off and my top end went up 4 mph .
Only cost me a 12 pack of beer so that was my best bang for the beer mod I have had .
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Post by wiscootsin on Feb 16, 2020 15:30:21 GMT -5
I was shocked the first time I put back on the freshly cleaned pipe after the I got it back from the radiator shop dip tank. Power was up on take off and my top end went up 4 mph . Only cost me a 12 pack of beer so that was my best bang for the beer mod I have had . I've heated two exhausts up over a charcoal fire and watched stuff burn out of it. Are you guys saying that's a bad idea, or just that the solvent dip is more efficient? I can definitely relate to feeling like I was killing brain cells with the fumes from the charcoal-grilling-a-muffler process... |
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Post by Zino on Feb 16, 2020 15:42:11 GMT -5
It can be done .
It is just hard to do it right when you burn them out and wives dont like the smell .
So it is just easier and less messy going to the radiator shop.
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Post by wiscootsin on Mar 4, 2020 18:28:24 GMT -5
Opened up the CVT today and I'm pretty sure the original belt was on it...it was 15.2mm wide. I put a used belt that had 17.3cm on it swapped in sliders (9g, same as the rollers)
and took it for a ride. Instead of operating at 8400rpm 37mph it went to 42mph at 7800rpms.
Kinda funny.
I ordered a new belt last week and some jets too.
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Post by Zino on Mar 4, 2020 19:39:26 GMT -5
5 mph for a 30 dollar belt .
Sometimes just maintenance is all these scoots need .
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