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People on this forum seem to be getting good customer service from Superior Powersports.

I've gotten good service out of my Znen. From what I can tell, Znen has their own in-house engine company.

This one looks interesting at $799 plus shipping:
www.superiorpowersports.com/150cc_Gas_Scooter_F4_p/zn150sc-f4.htm

Lemme go at this from different angle.

Which forum member has (or had) the oldest (among the membership) Chinese scooter?

I took a 1.5" dowel and strapped it to my floorboard. On the right end I drilled a hole vertically and inserted a 1/4" 20 threaded rod with a nut and washers holding it in. I screw my camera to that.

The twisty and hilly roads are a bit too far from me to take the 150cc. Getting there would be a tour in itself.

I don't know if my variator has any more travel in it or not. A longer belt is cheap enough to try out anyway.



Sounds like a job for you Zug.

I put 13g rollers in my Znen 150 when I took out ~16g rollers. I have good acceleration and decent high-speed cruising rpms. I'm just looking for that little extra. The stock belt is a 135 20. The lighter weights move the belt up the variator just as high as the stock rollers. See photos below.

I understand what weights do, I simply wanted to know why is it many other 150 riders are seeing such high rpms at top speed. Or rather, why do their scooters must attain such a high rpm to get to 55mph when my scooter does not. I was wondering if I could get more performance out of my scooter because I have so much "head room", so to speak, leftover. My reasoning was that, as I have read on forums, that peak hp on the gy6 150cc engine was around 7,000-7,500 rpm.

The lighter weights I installed made for good acceleration but put the cruising rpms too high.

yes when I had 11g it revved easily. I am sure I coulda hit 8,000 rpm but I didn't get to a 55mph road because I didn't have them in there long. I didn't like putting around town at 35mph with screaming 6,000 ish rpms. I didn't like the constant vibrations and racket. Besides, I could tell it was gonna reduce my top speed. So now I have 13g rollers and it is a nice compromise.