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mine has done it since i have had it. although i have controlled it adjusting the mixture screw, but i can more "feel" the right ratio in the throttle. Just ease on the throttle slowly, and feed it at the greatest rate to power "feel" possible. if there is a better solution, or really correct answer i would love to know it. good Luck

well feller's, I think I found the culprit. i took the carb and intake off to look at the reed valves they seem to be fine, no fraying or cracking or anything that looks to be in bad shape. So i took the cylinder and head off and removed the piston to measure the wear, and it was missing the top ring. I didnt see any bits down in the crank case, but on the side of the piston it was some kind of heat fused into the piston. The cylinder didnt show any signs of something traumatic happening oddly enough. So, i used the micrometer to check the go-nogo specs to see how worn it was, and it is right on the border line of needing replacement. Actually, the bike was hitting around 12.5k but wasnt quite to 60... closer to 56 (on GPS.) I believe I will go up to the 70cc bbk.

To my knowledge, it is all stock as far as the cylinder and crank, but I have put 1500k clutch springs, different variator ramp, have went up and down in roller/slider weights, changed to a 1500 torque spring (which im thinking of trying the 2k), sigma 6 carb kit w/ 100 mj, and a hp coil wire, put a cold-air intake filter with a "manufactured" air scoop fabricated, aftermarket exhaust that i hve nearly gutted, and thats bout all i can think of now, although im sure my wife will say i have enough hours in it to fabricate an entire fleet of scooters. I run high test petro and royal purple 2t performance oil.

I do say the bbk isnt on it to the best of my knowledge, but i do have the cylinder off so if there are any known markers or numbers to verify either size, i would love to know. I too am amazed by this little beast.

mechanical as in what, the valves, rod, could a fuse be bad and still be firing but not letting it crank?

I was coming home tonight whenever my bike simply dies on me. It ran great then all of a sudden, it started losing power, then pretty much bogged out and died. I pushed it up a hill on the side of the 4 lane, then rode it down to a parking lot where i started the diagnostics. I have done all the mechanic work myself including aftermarket exhaust, hp coil wire, iridium plug, carb jet kit, torque springs, clutch springs, roller weights, brakes, de-restricting sleeve, belt, installed night time parking lights in the factory brake light housing that look flawlessly factory. It was running close to 60 on the flats at about 10.5k rpm, awesome!! Till now. I dont know what is wrong but am leaning toward the worst end, as in a bent valve, broken spring, something. I would appreciate any advice, ideas, fixes, etc. I love my Super 9 scoot, and use it daily as primary source of transpo to and from school, work, and anywhere else a feller needs to go. Much Thanks in advance.

I do have fire from the plug, I have fuel, it splashes out of carb whenever air filter is off and my hand is choking it. I am not sure but thanks.

Actually, love my kymco, I weigh about 170 and 5'11". If u consider that to be heavier. And im not the person that doesn't understand physics. I. Am in college for Engineering. But I wasn't sure about mixing the sliders with the rollers.

This topic has been moved Super 9
because I need assistance, and this location will be best for viewing.
http://www.kymcoforum.com/index.php?topic=9411.0

hello, just curious as to what size belt you have and what the price was. Thanks