|
|
|
Thread Tools | Search this Thread | Display Modes |
09-12-2013, 03:48 PM | #1 |
Join Date: Jul 2013
Posts: 87
|
Gy6 50cc slower take off after changing roller weights and...
Hy recently i installed 5,75g roller weights and spare clutch from gy6 10* wheels scooter!
Now the problem is that scooter have slower take off instead off faster, but on revs it accelerates alot better. Now the questions are: Is that problem coused by roller weights? Are springs in clutch from 10* wheels scooter difriend than the springs in clutch from 12* wheels scooter? Can anyting else be wrong with the clutch, its 1 year old and i had 75cc kit for last two moths on scooter when i taked off the clutch? |
09-12-2013, 04:31 PM | #2 |
Join Date: Sep 2012
Location: West Haven CT
Posts: 1,165
|
Hi
welcome aboard Pleased to meet you Yes indeed it could be the rollers I use a roller tuning kit when upgrading. it allows me to experiment with different weights until i find the proper one for my performance needs http://www.scooterworks.com/prima-ro...p#.UjIjHNLryc5 Once i find the proper weight i then get quality rollers or slider as the tuning ones are not for every day use, i recommend DR Pullys or NCY If you decide to go with sliders go one gram heavier then the roller weight Take care and ride safely Yours Hank
__________________
"4wheels move the body 2 wheels move the soul" Duty, Honor, Country. Those three hallowed words reverently dictate what you ought to be, what you can be, what you will be. Douglas MacArthur |
09-12-2013, 10:12 PM | #3 |
Join Date: Jul 2012
Location: Miami, FL
Posts: 390
|
most people say to get 5 gram rollers in 10"" wheeled scoots.
Some do 4,5 gram, but then the scoot can over-rev. It also depends on what kind of counterspring your cvt is equipped with, and when it wears out, it becomes looser. |
09-13-2013, 12:01 AM | #4 |
Join Date: Jul 2013
Posts: 87
|
Hy, thank you for anwsers, so i must go with even lighter or heavier weights?
|
09-13-2013, 01:10 AM | #5 |
Join Date: Jul 2011
Posts: 127
|
5,75g ??? Did you mean 5.75g ? I had 8g from the factory and went with 5g rollers and it was so much better on take off and up hill .
On my Echarm I changed out the rollers that weighed 12.2g with 5k of miles on them for 12g Dr Pulley sliders . At first initial take off was a hair less but had a better acceleration and I gained 5 MPH on the top end . 13k miles later takeoff is even faster but tops out at 67 to 70 instead of 75 since they worn down and became lighter . Weight tuning requires testing a retesting as a half gram makes a diff . On my 2T it had 6g I tried 4g it did not take off faster but sounded like it was over revving on takeoff and had a top end loss . I mixed up 3 4g and 3 6g to equal 5g and liked it better . Later on when I installed a BBK , racing pipe and Uni I could hit 10,500 going up a large and steep hill . So I bought some 8g Dr Pulley sliders and Hoca 1.5k clutch springs since they engage at 1,500 RPMs higher than the stock springs to compensate for heavier weights . Well take off was much slower and top end was faster but I can still hit 9k up a large hill with a running start . I wanted to lower the RPMs at cruising speed since it drinks gas like I have a hole in the tank and I can just barely give it any throttle above idle when going downhill . We all know how much fun it is to zoom down a big hill . Unsure if the clutch would be a diff size so compare side by side or measure with a caliper . Now the performance variators which have steeper ramps and larger diameter slow take off but increase top end . You have the option to try 1k, 1.5k or 2k clutch springs which act like a stall convertor in a car with an automatic tranny so it can launch faster than the stock torque convertor |
09-13-2013, 01:53 AM | #6 | |
Join Date: Jul 2012
Location: Miami, FL
Posts: 390
|
Quote:
If you don't have a tach, you could get one for $15 from ebay, a battery powered, with only one wire that needs to be wrapped around the sparkplug wire; easy on install, but a necessary tool for diagnostics if the bike itself doesn't have a tachometer on board! |
|
09-13-2013, 01:47 PM | #7 |
Join Date: Jul 2013
Posts: 87
|
Hy, yes i ment 5.75g My engine is 50cc, top speed is only 50 - 55km/h with no restrictions, thats strange because gy6 scoot i had before that one went almost 70km/h, i dont have touch for rpms sorry :S when accelerating rpms are higher than on top speed if that helps. Thanks
|
09-13-2013, 01:50 PM | #8 |
Join Date: Jul 2013
Posts: 87
|
And i also removed metal silencer in exhaust, that looks like honeycomb and drilled a small hole in metal panel behind that "honeycomp"!
|
09-13-2013, 10:34 PM | #9 |
Join Date: Jul 2011
Posts: 127
|
Removing the baffling you reduced the back pressure which will reduce take off . I put a BBK and a racing pipe and it was not as fast on take off but mid and top end it was a screamer
|
09-14-2013, 07:36 AM | #10 |
Join Date: Jul 2013
Posts: 87
|
|
|
|