Kymco Super 8 125 Power Problems

[nicko9168]

I have a 2013 Kymco Super 8 125cc which I bought from brand new and for the last few months i'm really struggling to get it over 45mph. Once I get to around 45 its like the bike is struggling and starts to vibrate under my feet. Also i've noticed the last couple of days theres like a rattle underneath my feet like something is loose. Hope someone can help me. Thanks

[Mr. Paul]

Sounds like possibly a worn and/or stretched belt. How many miles on it?

[nicko9168]

Hi Mr Paul. I have done 6000km on it but I have replaced the belt already. I bought the belt off eBay - is there a certain belt for my scooter or does it matter which belt I get?

[nicko9168]

I have a 2013 Kymco Super 8 125cc which I bought from brand new and for the last few months i'm really struggling to get it over 45mph. Once I get to around 45 its like the bike is struggling and starts to vibrate under my feet. Also i've noticed the last couple of days theres like a rattle underneath my feet like something is loose. Hope someone can help me. Thanks

Also I have noticed there's not a lot of power through my throttle. It used to set off with a tiny bit of Rev but now it just sits and doesn't move until I give it around 1/4 turn.

[Mr. Paul]

It has been my experience that for performance and longevity the original Kymco belts work best. Personally I would not trust a bargain Ebay belt. However, it sounds as if your problem is more related to your carburetor. I would first replace the spark plug, then check the air filter, then clean out the carb. Simple cheap things first.

[nicko9168]

It has been my experience that for performance and longevity the original Kymco belts work best. Personally I would not trust a bargain Ebay belt. However, it sounds as if your problem is more related to your carburetor. I would first replace the spark plug, then check the air filter, then clean out the carb. Simple cheap things first.

What would you advise for cleaning out the carb?

[CROSSBOLT]

Why did you replace the belt at 6000 km? Seems kinda short to me.

Karl

[Mr. Paul]

Are you describing a poor throttle response or is the scooter is not rolling until you add more throttle than you used to?

[wkreps]

Also I have noticed there's not a lot of power through my throttle. It used to set off with a tiny bit of Rev but now it just sits and doesn't move until I give it around 1/4 turn.

Did you get the variation back together correctly? If the belt was keeping the vary nut from correctly locking down then there could be some real failure issues coming soon. I'd open up the vary cover and look and see what is happening inside there when you give it throttle. It might be a telling story.

[Mr. Paul]

If the problem did not exist until after the "new belt" I would strongly suspect the belt is, for lack of a better word, crap. Would not hurt to follow Waynes advice and recheck variator nut. The new belt likely has prematurely stretched and has worn very fast. I only recommend genuine Kymco parts. They will save you money in the long run.

[nicko9168]

Did you get the variation back together correctly? If the belt was keeping the vary nut from correctly locking down then there could be some real failure issues coming soon. I'd open up the vary cover and look and see what is happening inside there when you give it throttle. It might be a telling story.

Yeah I got the nut back on but had to loctite it so it doesn't come loose. The other problem with the nut is I had to take my kickstart off as that was spinning and screeching causing the nut to come loose. I think the belt may be a little bit big for my bike as the variator plate doesn't sit on as it used to. I will attach a link to the belt I bought. I'm going to buy a genuine Kymco belt and see if it's any better and also going to purchase a new variator set. Thanks for the replies guys really appreciate the help.

https://www.ebay.co.uk/itm/291694820764


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[nicko9168]

Did you get the variation back together correctly? If the belt was keeping the vary nut from correctly locking down then there could be some real failure issues coming soon. I'd open up the vary cover and look and see what is happening inside there when you give it throttle. It might be a telling story.

Also I noticed when moving the belt with my hand it's getting stuck at certain points as if it's too tightly packed. Also think the clutch needs replacing as my rear wheel isn't moving at all when on the middle stand as it used to spin slightly when the bike was idle.


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[nicko9168]

Also could you guys recommend an exhaust as I think mine is causing some problems aswell as it sounds slightly louder than before. I live in the UK bear in mind.


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[nicko9168]

Also guys (sorry alot of questions) is the model number of the belt I need for my Super 8 125 the same as the 150cc version or the 50cc version?
150cc version is 23100-KEC4-C00
60cc version is 23100-KEB7-C00

[Mr. Paul]

According to my research, the belt you need is a 23100-kec4-900. For now I recommend do not be concerned about your clutch or your muffler. Once you get the correct belt, I believe you will find those problems will go away. It sounds like your "new" belt has stretch prematurely. Half an inch in length can make a big difference in the performance. Kymco products are very good. I bought a bargain belt and very soon after it started to wear and give me problems. I purchased an original Kymco belt and it solved everything. Best of luck to you and let us know how it turns out.