New Rider
Currently Offline
Posts: 4
Likes: 0
Joined: May 23, 2013 14:52:00 GMT -5
|
Post by prota481 on May 23, 2013 15:00:14 GMT -5
OK I recently purchased a SYM Symply 2 50 cc chinese scooter. I believe its the exact same as an E-ton Sport 50. The problem I am having is that it will only go about 20 mph. It seems to be running well. I adjusted the valve lash, set both to .004 in. It has a new belt. I checked the roller weights, they looked ok for the most part, a couple had minor flat spots. So the first thing I did was try it with 3 of the 6 weights in the variator...still slow, still only does about 20 but revs higher. I am just at a loss with this thing...Would heavier weights help? What about the spring in the rear pully clutch, is there a way to check this to make sure its working properly? I removed it and i can move it in and out with my hands and it is stiff. The other thing is the battery is stone dead, ive been jump starting it, could this give me weak spark or something resulting in less power?
I know these things come restricted from the factory, but even so this thing should be able to do more than 20 from the factory. Any help is much appreciated! Thank you!
|
|
|
|
Post by larry001964 on May 23, 2013 15:11:42 GMT -5
Hi Prota,
I'm not sure how your jumping it. Just don't do it with a running automobile.. That will fry your system... Restrictions ? "Most" newer scoots really aren't restricted anymore... I would take a sharpie and mark a line going up the face of the variator, see how far up the variator the belt is traveling... if not all the way then try heaver weights..
|
|
New Rider
Currently Offline
Posts: 4
Likes: 0
Joined: May 23, 2013 14:52:00 GMT -5
|
Post by prota481 on May 23, 2013 16:24:39 GMT -5
[replyingto=prota481]prota481[/replyingto]Thank you I will try that. any idea what the compression should be?
|
|
|
|
Post by larry001964 on May 23, 2013 17:03:29 GMT -5
Thank you I will try that. any idea what the compression should be? 150 to 180 is normal for a 139 I think, well anything below 150 and I do a top end rebuild.. But that's me, and my preference, others here are much more knowledgeable than I... |
|
|
|
Post by PCBGY6 on May 23, 2013 17:11:03 GMT -5
It could also be your CDI. I have one i use as a spare and it starts up my scooters fine but top end only get about 23mph with it. With my good CDIs I get about 33-34mph on a scoot scooter. It's also the one i put on the scooter when I let my kids ride around in the neighborhood.  |
|
New Rider
Currently Offline
Posts: 4
Likes: 0
Joined: May 23, 2013 14:52:00 GMT -5
|
Post by prota481 on May 23, 2013 17:20:48 GMT -5
hmm so other than the top speed the scooter runs fine with the cdi that makes it run slower?
|
|
|
|
Post by larry001964 on May 23, 2013 17:26:51 GMT -5
hmm so other than the top speed the scooter runs fine with the cdi that makes it run slower? Well desmerwebb is right in that some cdi's are designed to limit your rpm's thus limiting your top speed.. I have not personally come across any myself but they do exist, and many here have had them... Just replacing them with a cdi that is not limited would increase your speed, providing that is what is limiting it... |
|
New Rider
Currently Offline
Posts: 4
Likes: 0
Joined: May 23, 2013 14:52:00 GMT -5
|
Post by prota481 on May 23, 2013 18:18:42 GMT -5
Yeah I have heard that some do limit the rpms, but I was under the impression that it would limit them to excessive speeds. Like, this scooter should be able to do 30 from the factory. Its barely doing 20.
|
|
Main Jet
