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10-08-2015, 07:44 AM | #2 |
Join Date: Jul 2008
Location: York PA
Posts: 339
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Depends on what your after, mileage or quicker off the line.
Most scooters run fine with factory roller weights. I swapped mine out with 3- 17 grams DR.Pulley rollers, and 3-20 gram Dr.Pulley sliders, for my 250 cc BR. It came with 156 grams of rollers, sucked off the line, a long slow climb to 55 mph, then it would get up to 65-70 mph, and then with terrain bounce between 65-75 mph. BUT I gave up the better gas mileage for the much better jump off the line, and keeping the top end. My last change will be swapping final drive gears, if I can ever get Polini to answer my emails. That may be the 4-6 mph I need at the top end, when I take the BR for nice long 1500 mile run for a few days. We'll see, I'm not much of a scooter mechanic, I'm sure others have much better advice for you. I've been lucky to follow on how other BR owners are tweaking theirs, for every bit of power we can get from them....without machine work.
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10-08-2015, 12:07 PM | #3 | |
Join Date: Dec 2014
Posts: 738
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Quote:
P.S. Sorry to change the subject but I'm trying to help & keep someone from going thru the same runaround that I had! |
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10-09-2015, 08:22 AM | #4 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
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Yes you should change your variator to a steep-ramp style variator such as a KOSO, NCY or Mallossi with FLAT SLIDER weights.
A gy6 139qmb/j is a 50cc, it likes 6-7g flat sliders A gy6 157qmb/j is a 150cc, it likes 11 to 13g flat sliders
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2011 Roketa MC-23-150 4T 150cc 157 qmj 24mm carb w 115 main jet and paper cone air filter Manual petcock w Tygon fuel lines Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust RED spring clutch Adjustable CDI (brand unknown, it's blue and red and works great!) KOSO high performance variator w 12g sliders Gates Powerlink 835-20-30 belt GPS verified 65mph on flats. |
10-10-2015, 08:09 AM | #6 |
Join Date: Jul 2013
Location: richmond,VA
Posts: 94
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I still have stock variator and have 4.5 rollers to get me up the hills at 200lbs. Slow off start, then maintains speed nicely with good speed/power up hills. Quingqui 2012. (Got my advice on rollers from chinesescooterforum)
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10-14-2015, 02:51 PM | #7 |
Join Date: Mar 2013
Location: murphy n.c
Posts: 467
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koso variator and sliders gave me 5 mph more.cheap way for speed and take off
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