opinions / help

[coachhejl]

I bought a Scootstar Roguestar 50. Has the typical 49cc 139qmb.

I bought a plain 72cc big bore kit and will put it in, next couple weeks I will put it in.

I have several different roller weights to tun the cvt...as well as a little better variator.

Jet kit 78-105 I think.

Anyways...I want to basically upgrade the top end and then as minimal as possible everything else to keep it reliable and easy to tune.

After installing the BBK, what are the secondary upgrades/tuning upgrades you would do to get the most bang for buck and to keep bike reliable and easy to tweak after that?

Stock carb is a Deni PD18j (made in japan). It seems higher quality than the $25-$30 ones you can get on ebay and amazon.

My current rollers are 6g, which to me seems a bit heavy for a stock 49cc 4 cycle.

Anyways, just looking for opinions.

[FrankenMech]

Try one thing at a time.

[Zino]

First law of Scooter tuning change one thing at a time.
2 reasons for this
If there is a problem you can retrace your steps .
You enjoy and feel the differnece of each piece of your hard work .

[claydoh]

I will third what Zino and Frank are saying, One change at a time. Try that change for a bit before going to the next thing.


As to roller weights, that is almost purely dependent on your personal preferences. I myself always seem to end up back at the stock 6g, even after a variator upgrade. *You* might like something different, or find one that works better for your usage.

[coachhejl]

So 6g is quite common as a stock size?

Jan 4, 2023 9:54:36 GMT -5 claydoh said:

I will third what Zino and Frank are saying, One change at a time. Try that change for a bit before going to the next thing.


As to roller weights, that is almost purely dependent on your personal preferences. I myself always seem to end up back at the stock 6g, even after a variator upgrade. *You* might like something different, or find one that works better for your usage.

[claydoh]

Jan 4, 2023 16:11:53 GMT -5 coachhejl said:

So 6g is quite common as a stock size?

As far as I have seen on my three different scooters, they have all been 6g.
One new, one used/unmodified, and one used/slightly modified. All 49cc qmb139's

[GrumpyUnk]

One important bit to consider when fiddling with weights is the weight of the operator. The additional weight of a driver is a significant portion of the heft the scooter has to haul around, much more so in a small vehicle.
Thusly, suggested weights for the variator will give different results based on operator weight. FWIW.
Stated only to remove the surprise when things come out differently when testing.
tom