KymcoForum.com
Scooters - 50cc => Agility 50 => Topic started by: Circus on March 27, 2010, 12:43:31 AM
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Hey guys, finally did the BOSS derestriction, and got a UNI stage 2 air filter to replace the box. Lucky me I guessed the mixture and just did a plug chop after a day of riding and it looks great!!!! I love the new performance, however, I've lost a lot of power off the "line" the speedo winds between 80km and the odometer full throttle, but it takes a lil goin to get there. Im considering a pipe as well, but is there anything else i can do to get my torque back?
also, how often are you guys changing oil? Im doing one today, but so I can keep up on it.
Thanks guys!!
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Congrats! Changing the rollers out for lighter ones somewhere around 5g will give you better acceleration. Changing the 3 clutch fly springs for stiffer ones, probably 1500, will give you that quick take-off from the line.
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You lost the power w/ the filter because you are running too lean now. raise the needle for midrange, and/or re-jet up 1-2 sizes.
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I totally missed that one! I for some reason thought he did that. My bad! Well, what I said previously will help too, but definitely get the carb sorted first!
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You lost the power w/ the filter because you are running too lean now. raise the needle for midrange, and/or re-jet up 1-2 sizes.
..if his carb is like mine, there are no means for needle adjustments...
..nylon retaining clip must be modified, and a washer put beneath the needle's head to raise it any at all...
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Well sad news yesterday, the scoot died on me while i was riding. just bogged down and died. wont start back up. the starter just whines, it doesnt even seem to try to turn the motor over. i can hear the piston moving when i kick start it, so i know its not froze. ive been told twice to change the plug because on 4 strokes if you run too lean even for 1 ride its death to the plug. anyone have any advice?
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..i guess it would have to be extremely lean to burn the plug up...so quickly...personally, i've never heard that statement...
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The starter giving out is most likely just a coincidence. Do you have a compression gauge? Look for at least 100 psi. If not you may have to pull the head looking for a burnt exhaust valve or piston. Have you pulled the spark plug? if so can you post a pict, or describe it?
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the metal hangover, spark receiver i guess youd call it(the part you gap away) is lookin a lil galvanized color like light battery corrosion, but not super rough textured. the white around the spark sender(the lil nub on the porcelain) is white with tan and some brown spots. i did have it leaned all the way out because the motor sounded a lot better when tuned that way.
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You really need the firing end to be from light tan to biscuit brown...
(http://img171.imageshack.us/img171/3743/readingsparkplugs.jpg) (http://img171.imageshack.us/i/readingsparkplugs.jpg/)
(http://img31.imageshack.us/img31/6110/plugapp.gif) (http://img31.imageshack.us/i/plugapp.gif/)
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You burned something! Either a valve or piston. I think! The good thing about it is the parts are cheap. The best part is you will know how not to repeat the problem, a few pistons will turn you into an expert, and it sucks but you will help others w/ what happened. http://docs.google.com/viewer?a=v&q=cache:GWxVkWUBzb4J:www.paradrenalin.com/Spark%2520Plug%2520Color%2520Chart.pdf+spark+plug+color+chart&hl=en&gl=us&pid=bl&srcid=ADGEESij0N5FFPocWiwf4VDFupy6mWSfW6Y9XR0I_Ymp64WOx9D72jUqD0kdOAEnh0fH7FRyozRn6oa_BFhYYouLdpfkta1EnqOVruCfhs02ooOG3qCxPLQkfktjuf4Q_pCJn7iBOWun&sig=AHIEtbQIrrHzVlFaomFOfOEef_UncivxVg (http://docs.google.com/viewer?a=v&q=cache:GWxVkWUBzb4J:www.paradrenalin.com/Spark%2520Plug%2520Color%2520Chart.pdf+spark+plug+color+chart&hl=en&gl=us&pid=bl&srcid=ADGEESij0N5FFPocWiwf4VDFupy6mWSfW6Y9XR0I_Ymp64WOx9D72jUqD0kdOAEnh0fH7FRyozRn6oa_BFhYYouLdpfkta1EnqOVruCfhs02ooOG3qCxPLQkfktjuf4Q_pCJn7iBOWun&sig=AHIEtbQIrrHzVlFaomFOfOEef_UncivxVg)
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...what's the most important keywords that we use when tuning a carburetor???
..DON'T RUN LEAN!!!!...
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..DON'T RUN LEAN!!!!...
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Dont run LEAN
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Lean run Dont... ???
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k...got that. so where can i get a piston and rings at. i have the original 49cc head and plan on rebuilding the motor and putting it back together as a 49cc motor. Also, mind you its an aftermarket carb so all the way leaned out may not be the same as all the way lean on the stock one. but ya, piston and rings, where at lol
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..stadiumyamaha.com...
..
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While you have the head off... turn it upside down and pour a small bit of gas in it. If the valves/seats took a beating the gas will flow out past the seats. Visual inspection is not enough.
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If you went to all the trouble of taking your motor apart why not upgrade?? ???
I mean....while you have it apart......
;D