Can i pick you'r brain?

[larrball]

Hey guy's im needing some input, and somehow i'll try to get to the point.
Frist off this scooter of mine is not what i'v seen as a typical cheepE cheep slap it together and ship it with super cheep parts.(i'v had 3 and i know cheep and this ones a bit newer and difference then the 3 outher ones.. but in a good way)

2009 Jonway VIP Future Champion YY50QT-21
Engine Family: 9JNYC0.05NFG
Driver weight : 125-130 Lbs

It's all stock and what is stock on this is: mostly all the little prominence parts everyone is needing to get because there $500.00 (internet sale) scooter is in a class right along with grandmas medicare scooter. /joke.

Now this scooter runs great 40MPH on a flat @ 7500-8000 RPM and if one is inclined she will clock the GPS at almost (48.5) 50 at 10,000 RPM.down hill of course (throttled back right at 10,000)
But to get going i need 4500-5000 RPM and then it moves and i mean it want's to go (kinda feels like it's holding off tell the last sec)

What type of spring's, clutch and weights would this kinda set up have? (or need to have)
I havent looked yet past the belt, but i did try to compress the spring to see if i could take the belt off by hand this way and the spring is one hefty spring and at no luck to me without a 3ed hand to help.

Like i said theirs nothing wrong, i just wanted some input on what you thank this set up might be.
Im not a racing guy so i doin't know. I do know that you need the right variable,weights,belt, clutch and clutch spring to get this high in rev as so to keep in the power band as so you can have the best overall proformence in low/mid/hi ends.

[90GTVert]

That's a good running stocker. If you only knew how much work I put in to hit a max of just below 48MPH on my SunL (granted, I weigh more than 2X what you do). It sounds like you just need to get the revs up with some roller or slider weights for better acceleration. I would start there rather than going to the trouble of replacing contra springs or clutch springs just yet. My guess would be 5-6g slider weights would be a nice upgrade for you. If you can afford two sets, get both and then you can try 5, 5.5, or 6g to dial it in better. If not, maybe someone closer to your weight might have a better suggestion?

[larrball]

Thank's brad but what would it take or better yet what would you put in a CVT to get what seems to be what's in this scoot?
Im simply trying to find out what they might have used.
All my other scooters have the typical stuff.

Brad is 5000 rpm a bad thing for a scooter to start out at?
Idles great @1,800 RPM.

You said i need to get the rev's up.. heck 10,000 RPM down hill is kinda pushing it, at least i thank it is.
Now i do agree, that some DR pully/sliders might be nice, because i simply thank it has just the round ones,due to a sight mid-range hesitation.
When i need to i'll put in sliders just because its the better ideal.
As alway's brad, your input is welcome

[preytheweak]

Sounds like it's running good to me. Don't change a thing. Sounds like you already have a taller gear set in it. My buddies 4T only does 40 MPH at 10,000 rpm. But you a super light. Does it have a long or short case. 10 or 12 in. wheels. If it does have a taller gear set. It would be flying with a BBK on it.

[90GTVert]

Oh, so you are trying to figure out what you have. I must have misunderstood and thought you were saying you wanted the power to come on faster or something. Well, it's easier to figure out what you have than what you need. It will need service eventually, and when it does you can weigh the roller weights and have a look around. It could be a nicely tuned transmission. It could be that you got one of the 60cc models. Some 139QMBs came with a 44mm bore stock, so they perform quite well compared to the average 49cc.

It's Brent BTW.

[larrball]

preytheweak,
Not going to change what is not broke,but you do have a good point.
As far as the case. it is the short case. [like the school bus i road as a 12 year old]
And i agree, it's ichin for a BBk upgrade and i'll bet the city police do too = city revanew. I plead guilty! <--- :checkered:

Brent,
My bad on the name calling (misspelling).
Im not looking for more improvements engine wise,i only wanted to know what might be in this VIP scooter(without tearing it apart) as i cant order parts like i did with my other 3 scoots. -- this one is my daily driver.
Most parts that i see online are for what look's like in the 125-150cc range.
Now you said 60cc? I have never seen this info before.. Hummm food for thought.
I have been enlighten. 60cc's humm