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11-09-2014, 03:53 PM | #1 |
Join Date: Jul 2013
Posts: 87
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Clutch slipping?
Hello, first info about my scooter:
75cc BGM PRO Alu kit CVK sport carb 2eXtreme performance variator 2eXtreme racing clutch drilled out original exhaust 5.75g MotoForce roller weights 86 main jet MotoForce ECO 729mm belt Car spark plug cable Original counter spring, 1000RPM 3 clutch springs Now here is the problem: When i installed the 75cc kit scooter went around 100km/h and it had good acceleration -it was screaming After a mounth later the problem started, it went only 60km/h with poor acceleration. Engine was running well, but RPMs were higher on take off and acceleration. So i inspected the CVT -clutch pads were worn and clutch bell was purple. Then i bought 2extreme racing clutch and new clutch bell. I installed 2000RPM clutch springs and it was over-revving and going nowhere, so i installed 1000RPM (softest) springs and its a little bit better, but this is not it, it still goes only 60km/h and its still over-reving. I tried going up hill and i was doing about 10km/h at full rpm, than it started smoking out of CVT cover vent :S Also i can clearly see that clutch pads are grabbing the bell with only half of its surface :S It would be logical that i need to install softer springs, but 1000RPM are the softest, so what can i do? Im getting less than half of the power from my scooter, other power just goes out with over-revving :S I cant try springs from old clutch because they are bigger. Here is also another strange thing (handebars are shaking after take off (at 00:05), plus you can also hear the over-revving, watch the video): Thank you for your time |
11-09-2014, 04:23 PM | #2 |
Join Date: Oct 2008
Location: Hyde Park, NY
Posts: 1,130
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The first thing you need to do is take off the variator case cover, put marker lines on the variator and ride. You will know if your belt is going up all the way on the variator from that. You might go to another clutch. Not all performance parts are infallible.
__________________
2008 Eagle Milano 150- 9,679 miles 2009 Honda Rebel 250- 10,434 miles 2009 CF Moto Fashion- 16,023 miles 2009 MC-114 50cc Cub Clone- 4,317 miles twowheeler.yolasite.com/ That's 30,049 China Scootin miles and Counting. |
11-09-2014, 04:35 PM | #3 | |
Join Date: Jul 2013
Posts: 87
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Ok, i will try that, i hope that i didnt trow away my money out for this "racing" clutch, otherwise i will request my money back -.- |
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11-19-2014, 09:35 PM | #4 |
Join Date: Mar 2013
Location: murphy n.c
Posts: 467
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im tuning my variator so from what im getting from you is if I take my cover off and look at both pulleys and the variator should be at the highest and clutch the lowest at the same time?i know this has been askes so many times and I appoligize for repeating the question
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11-15-2014, 12:33 PM | #5 |
Join Date: Jul 2013
Posts: 87
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Ok, so i installed original clutch and now it takes off perfectly, handlebar is not shaking anymore, acceleration and top speed are better/higher, but this is not it :S Top speed is 80km/h instead 100km/h. Clutch and springs are identical that i was using at first place. What could be the problem, what can i try now, could this be the CDI? Thank you!
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11-15-2014, 02:10 PM | #6 |
Join Date: Oct 2008
Location: Hyde Park, NY
Posts: 1,130
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I see this. 5.75g MotoForce roller weights
What weights did you have originally? You might pick up top end with 6 grams.
__________________
2008 Eagle Milano 150- 9,679 miles 2009 Honda Rebel 250- 10,434 miles 2009 CF Moto Fashion- 16,023 miles 2009 MC-114 50cc Cub Clone- 4,317 miles twowheeler.yolasite.com/ That's 30,049 China Scootin miles and Counting. |
11-17-2014, 02:43 PM | #7 | |
Join Date: Jul 2013
Posts: 87
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Quote:
But if i put in heavier weights acceleration will be even worser, right? Or can weights be so light that engine is over revving and not getting chanse to "grab" those accelerations? Thank you |
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11-15-2014, 09:22 PM | #8 |
Join Date: Nov 2013
Location: Orlando, Fl.
Posts: 75
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What he said "KZ1000". The belt must go to the top of the variator face AND to the bottom of the clutch drum simultaneously to achieve the highest road speed. From there you are limited by how fast your engine spins ( RPMs)
The centrifugal clutch springs will change how high the engine revs before you leave from a dead stop. Once you are above app 10mph those springs have no consequence . Check to be sure the belt is correct/ I've just had my ass kicked by purchasing online and got the wrong belt size. One symptom was a reduced top speed. My size was off by only 2mm in width, it makes a world of difference ! |
11-17-2014, 02:51 PM | #9 | |
Join Date: Jul 2013
Posts: 87
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11-17-2014, 03:05 PM | #10 |
Join Date: Oct 2008
Location: Hyde Park, NY
Posts: 1,130
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I know I sound like a broken record but it's possible the performance rollers are letting you down. They may have flat spotted and aren't opening the variator all the way. Besides, a quarter of a gram between the 6 and 5 3/4 gram rollers shouldn't affect acceleration that much. You might get more top end with a very slight loss of take off.
__________________
2008 Eagle Milano 150- 9,679 miles 2009 Honda Rebel 250- 10,434 miles 2009 CF Moto Fashion- 16,023 miles 2009 MC-114 50cc Cub Clone- 4,317 miles twowheeler.yolasite.com/ That's 30,049 China Scootin miles and Counting. |
11-19-2014, 12:47 AM | #11 | |
Join Date: Jul 2013
Posts: 87
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