top speed questions? By gy6139qmb2013 (Read 623 times)

[gy6139qmb2013]

So my scoot wont go over 25mph. Iv been looking at things and have noticed I cant depress my clutch variator ( I believe thats what it is?) by hand? And have noticed the spring is a bit rusty? And I also have a set of just black rollers in the front variator. There unmarked? anyone know if these are the stock? Also I was holding the throttle wide open one the center stand and at what seemed to be full speed with wot black smoke was faint but I could see it? Is the carb out of adjustment? Thank you in advanced.

[jct842]

First tell us what scooter you are talking about. None of the rollers are marked that I have ever seen. You weigh them to find out what they are. Do you have a tach? How old is the scooter and how many miles on it? Black smoke could be a rich mixture and it could be oil burning. What has been done before to it?

[kz1000st]

How old is the scooter? How many miles? Your belt could be stretched, you could need a new spark plug. Did it run faster before? How fast?

[gy6139qmb2013]

gy6 qmb139 50cc 4stroke....actually I assembled this bike from many scooters. I dnt know how many miles? And no tach. Brand new spark plug. I do have another belt to compare to and unless there both stretched. Just starting to ride for the first time. And was thinking it would go 30 or so. everything is stock except the coil and the cdi. the cdi is blue and says q power p50 but its hard to read the lettering is a bit worn. coil is a little square box about 2''x2''x1'' black and has a blue plug connector. im starting to lean towards the clutch? Should i be able to depress the spring by hand? Its really tuff..lol and its looks stock.

[Alleyoop]

take the CVT cover off and rev it up to full throttle and watch the BELT on the VARIATOR and see HOW HIGH it climbs on the Variator. Or better yet MARK the variator like this and run it on the center stand and see how much of the mark it took off.

Then Mark it again and ride it at full throttle and see how much of the mark it took off with a load on the motor.

Take a picture after each mark left and post them here. It could just be your rollers are to light OR to heavy. TO HEAVY it will not let the motor reach good RPMS, TO LIGHT and it will not push the belt up for good top end.
Alleyoop

[gy6139qmb2013]

ok. When i try to post a picture i use the add attachment button and it loads it. but it dosnt appear in the post?

[jenningsjosh]

Use photobucket.. instructions are in general discussion.. there are a couple others too.. but I prefer photobucket

[Alleyoop]

Another is PUSHPICTURES very easy to use and you do not have to be a member.
Alleyoop


You can use push picture to put up pictures here it is easy and free:

picturepush.com/host.php?image=10075950

1. Click on the BLUE UPLOAD another image
2. Click on BROWSE
3. That will display your computer directories
4. click on where your picture is at
5. Click on your picture and click on OPEN and it will load it
6. Then scroll down to the box where it says640*480
7. Click on the 2nd entry in those links -- it will turn blue
8. Right click and click copy
9. Come here and right click and paste it in your post.

[gy6139qmb2013]

well at any rate I did do this and it is about 1/8. Just wish I could get that last 5 mph out of it..lol thanks...

[Alleyoop]

If you have 1/8 no way will you get 5mph more unless you get more power to the motor to turn the variator faster. Now you could put in taller gears in the tranny but only do that if your motor pulls strong from start and gets up to 30 pretty quick. You may loose a little on take off and getting up to speed if your motor does not pull strong.
Alleyoop

[gy6139qmb2013]

.... So I took apart a few things and checked everything. And noticed I have a wire thats not connected to anything on my cdi. Its black w/ white stripe.

Also I have a few clutch bells. And they seem to be a bit different? As in weight? would this affect my top speed? I have swapped out one and have noticed a slower start off and acceleration?