Why don't upgrades work on my Kymco Super 8 scooter?

by Alan McGowan
(Nashville TN)




Scootin Nashville TN

Scootin Nashville TN

I have a Kymco Super 8 150cc and I have the Yoshimura pipe for it which doesn't increase my speed just kills my Mpg's and makes me really noticeable from its thunderous sound.

I have tried changing out to larger jets and an UNI pod but they too just rob me of mileage and seem to do nothing. At jet #120, the engine starts to sputter and die as if choked with gas.

I have not changed my CDI unit yet due to the fact I seem to have two and I don't know which one is the one I need to change. The one in the front cover looks like the ones they sell on the web, but it has a red ground wire coming out of it, and the ones from the web don't have this.

My top end is about 58mph and I would at least like to hit 62-65 as other scooter drivers claim they have peaked at. Is there any help for me?




Comments for
Why don't upgrades work on my Kymco Super 8 scooter?

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Jul 27, 2011
 Exhaust
by: Anonymous

Well first of all most exhaust systems on scooters will not give you a big increase in speed nor will the uni pods. Exhaust on scooters are meant for looks and sound. i have never gotten any increase in speed on my scoots. Since you are dealing with such small engines with such little hp (9-10hp)the gain of power in an exhaust will not even be noticeable except in 2 stroke scoots. Second if you are running a 120 main jet and it's bogging then you are too rich and need to bring it down. third if that is you in the picture (and don't take this to offense) but the greatest way to gain top speed and acceleration is to loose some weight. A 170lb rider goes faster than a 240lb rider. Fourth if you want additional speed play with the CVT (variator, slider weights, kevlar belt, and maybe a Dr. pully clutch)
Sep 29, 2010
 Super 8
by: Anonymous

I thought to add the YOSHIMURA pipe but if you don't get more speed it's a bit too much for sound.
I get 65mph on my super and I didn't do any upgrades at all.
Jul 28, 2010
 Here It Is
by: Jim Zeiser

Here's the listing for Craig's List in your area. I see Red Dog Scooters is near by. They're a great outfit. Also there's a Yamaha Majesty listed for under $3000, a great price. Keep checking daily
Jul 27, 2010
 What Can I Say
by: Jim Zeiser

"I have not changed my CDI unit yet due to the fact I seem to have two and I don't know which one is the one I need to change. The one in the front cover looks like the ones they sell on the web, but it has a red ground wire coming out of it, and the ones from the web don't have this."

I would check and see if that unit under the front cover is your voltage regulator, that's where it's usually located. The CDI is usually located on the frame above the engine. I would back off on the jetting and see if the engine pulls better, say a 115. You can over jet these things. If you really want more speed you might want to look into a used 250cc Honda Reflex. On Ebay they sometimes go for around $2500. Also look at Craigslist.org in your area. The Super 8 is a good little scoot but it's only good for so much.

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