|
|
|
Thread Tools | Search this Thread | Display Modes |
|
08-08-2015, 01:19 PM | #1 |
Join Date: Dec 2013
Location: Western New York
Posts: 454
|
Maybe you need to lower your expectation, of what such a tiny engine is capable of doing. You have to know how many rpm's your engine is producing at top speed, before tuning your cvt....so, do you have a tachometer? One would think that if it came stock with 7 gr weights, that after a bbk install, a heavier weight would be ok. But this may not be the case, considering your size.
So is it cranking out 8000 rpm's at top speed.....or unable to reach 6500? |
08-11-2015, 11:50 PM | #2 | |
Join Date: Jul 2015
Location: schofield, wi
Posts: 23
|
Quote:
|
|
08-12-2015, 07:26 AM | #3 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
|
Having installed literally dozens of bbks on 139, 1p40, 157 and 152 engines, as well as being extensively familiar with all makes of scooters since I built my first Lambretta in 1988, I will now state that achievement of any flat land speed of over 5Omph on a 73cc 139, is pretty good, and about all it will do.
Mods help the 139 gain acceleration, but really don't do anything to the top end. A 73cc engine is approximately 4cid, or 1/3 the displacement of the cheapest lawnmower available at Wal-mart. To assert the modified 139 is capable of speeds in excess of 55 mph on flat ground, is untrue, and unrealistic.
__________________
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. |
08-13-2015, 03:00 AM | #4 | |
Join Date: Jul 2015
Location: schofield, wi
Posts: 23
|
Quote:
|
|
08-13-2015, 06:03 AM | #5 |
Join Date: Jul 2011
Location: Connecticut
Posts: 493
|
You're all kinds of wrong. I really wish the admins would stop letting you post bullshit.
__________________
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. |
|
|