New Wolf Brand V50 Owner...got a few performance ??'s

[inv8dr]

Hello to whomever took notice,    
    I recently purchased a Wolf Brand V50 50cc scooter which I believe is a GY6 139QMB and I would like to increase its speed from stop to start and top speed. I have been researching performance mods that could achieve this and before I start breaking the bike down I'm hoping to get some clarification and direction, or be told I'm way off and pointed in the correct direction. Before anyone jumps at me about buying a bigger scooter, I know, but I cant afford the insurance required to ride one and I've had to stick with a 50cc and hope I can mod it and not get caught. I've read that many, if not all, 50cc scooters have speed limiters either on the variator, the CDI, or related to the air-intake/carburetor air/gas mix. My initial plan was to take off the kick start cover and remove the spacer/restrictor from the variator. Then I watched a video posted by Wolf Scooter showing how to replace the stock variator with a performance variator and clutch and I didn't notice any large washers that may be inhibiting the clutch from achieving full movement. Maybe they removed it for the video, maybe they were working on a 150cc.

Question 1: Does anyone know if this brand/model has a spacer/restrictor on the CVT?

After watching the video I decided to find out what exactly a performance variator was and why you might want it and after learning about that I then wondered if replacing the stock variator with a performance variator and decreasing the roller weights was what I needed to do.

Question 2: Assuming there is no restrictor on the CVT is a performance variator the mod to make? Do I need to replace the variator and clutch assembly? What roller weights are best for a 50cc scooter?

Currently I can achieve a Chinese 45mph (US 40mph) on a flat roadway, but not for a long distance, I'll hit 40 for a minute or so then it'll drop to 39. 39 has been my top speed for the longest distance.

I really appreciate any help and time anyone may be willing to give. Maybe I'll find I should be grateful I've got a 50cc that gets the speed it gets, however I am hoping there is a way to increase it a bit more, ideally if I could hit 50mph I'd be happy. I am using this as my full time vehicle in Miami and people down here use the speed limit as a guide for their minimum speed on any given road, not maximum. It's a little scary riding a scooter on streets at 39mph while everyone else is flying past you/around you much faster than that.  

Thanks for your time.

[aeroxbud]

Welcome to the forum.
It's only the 50cc scooters that might have a restriction ring in the variator. This is because legally in most places they are limited to 30mph.
If it's doing a true 40mph that's quite good. Some are restricted in the cdi.

[GrumpyUnk]

As far as I know, I have yet to see any restricted machines locally. Those sold in the EU are seemingly more likely to have either a CDI or variator limiters installed. I did find a limiter built into the CVT cover on a rather elderly Victoria built by Jonway. It has a sensor that can note clutch rpm. It was disconnected by the PO.
A well tuned variator can provide maximum performance. The late model Taotaos I have ridden seemed to work very well out-of-the-box. No tuning seemed necessary.
I don't know beans about 'chinese mph'. The speedos are calibrated in Kph and Mph. 100Kph ~= 62mph. 50kph is about 30 mph. If you are getting 40mph, you are doing very well.
I would tend to avoid 'commuter' streets. Find back roads through less commonly used roads. You will feel a lot safer, and can actually enjoy your ride without looking over your shoulder for that driver that is trying to kill you. (mostly not-on-purpose, but at the time, what does that matter??)
Some will advise against installing larger piston/cylinders(BBK) as it overstresses the rest of the drive train. My take is that the BBK setups are sold in the local market, where these machines are used for EVERYTHING. The whole family can ride at the same time... or they will carry goods to market that would scare you if you saw them on the road. The kits are 'rebuild' kits for the local market. If you are not adventurous, the first step up from 39mm bore will achieve 63cc, and the difference will be notable with that. If you look at the kits, the iron cylinder walls look as if the 39mm can be bored out to the 47mm diameter of the 72cc BBK. Without adding anything! They are designed to be bored. In the local market, you can buy 'slight' over bore diameters, such as 39.5mm(not exact)piston and rings, and have a slight overbore in the cylinder to correct for any damage. They get a 'brand new piston/rings/cylinder' with a small increase in power and fuel consumption at a very low cost. YMMV. actually, will vary.
If you can live with your curent performance, you should get a good long life. Changing oil is a 5 minute job that can be done using 1 wrench and a drain pan. If the dealer is charging 1/2 hour of shop time, varies, but likely ~$35-ish, you can save 30 of that buy doing it yourself. Doing at your convenience instead of making an appointment, going to the dealer, dropping off or waiting, is a lot more attractive to some. The store that sells the oil will most likely take back the used oil(convenience stores??, most auto parts stores OK) so you don't have to dispose of it yourself. My recommendation is to use 'diesel' rated lubes, such as Rotella, Delvac, and WallyWorld SuperTech. You can get a 4-quart container for ~$12ish and get 4+ changes out of that.
tom

[inv8dr]

Tom: I can't thank you enough for your reply. While I got a little lost on all the different sizes regarding BBKs I am sure I will be able to reference back once it I start looking into that as possibility. My comment btw, to Chinese MPH was an attempt at a joke that apparently wasn't funny. What I meant was that I am seeing 40MPH on the speedometer but GPS and radar signs along the road are always about 5MPH less than the scooter is clocking.
Prior to seeing your response I had ordered a CDI that is not supposed to have a rev limit on it. After reading this tho it sounds as if that won't do me much good. I also saw a youtube video saying the top cap of the carburetor can have a device that also inhibits speed. I don't know if I'm sold in that yet as that's the first time I've heard that so far.
Anyway, thanks again for taking the time to help me become a little more educated on this.