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Post by KSR Moto on Feb 15, 2018 15:26:47 GMT -5
I have a taotao 4 stroke everything stock with only performance exhaust, the problem is that from 3/4 throttle to wot doesnt do anything it wont bog down but it stops to react from 3/4 to wot
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Post by james82nd on Feb 15, 2018 15:56:41 GMT -5
without a big bore kit it will do that try a 38 pilot jet with a 90 main jet and get rid of the stock air box the 38 pilot jet will help your starting issues in cold weather m4 size 38 pilot jet and buy a performance airfilter 39mm I have a 2014 fully modified taotoa that will do 60MPH
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Post by KSR Moto on Feb 15, 2018 17:11:07 GMT -5
I am currently using stock main jet, i also have sport air filter 38mm but didnt installed it yet
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Post by KSR Moto on Feb 15, 2018 17:12:24 GMT -5
I have no problems with cold starts only when hot but it is not that bad
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Post by james82nd on Feb 15, 2018 18:17:02 GMT -5
looks like you need a Big bore kit, for what you are looking for
stock bore is 39mm vs 52mm they have now on the market 52mm is the bore of a 125cc but with the stock crankshaft in a 50cc is 41.4mm which yields about 88cc it makes a huge difference
I weigh 215lbs and my 2014 50cc scooter will do 60MPH with the 52mm bore kit and all other things I have modified on it.
that is 60MPH at 8000 rpm...which I am running 8 gram dr pulley sliders, but I will upgrade to 8.25, and if necessary to 8.5grams
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Post by james82nd on Feb 15, 2018 18:25:13 GMT -5
without going to 24mm carb and BBK(big bore kit), try the 38 pilot jet with a 20mm or 23 mm carb and a 90 main jet and get rid of the stock air box and put on a 39mm air cone filter
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Post by james82nd on Feb 15, 2018 18:27:28 GMT -5
also upgrade your Varitor to a DLH with 1.5 grams more than stock. usually stock is 5 or 6 grams. My stock taotao had 6 grams runn 7 grams with the upgrades and WOT should give you the best with stock bore
I also found out that with a Naraku belt 729-18-30 you will gain 5 more MPH top speed. as long as your taotao has the long case and the 729 belt
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Post by KSR Moto on Feb 15, 2018 18:41:02 GMT -5
Thanks a lot, the thing is i already had my other scooter modified to bbk(80cc) it ran great but eventualy in a long run it destroyed the bottom end of the engine, that is why i want to fine tune my stock bore on this scooter, but came acroos this problem when it stops accelerating from 3/4 throttle to wot, i will try bigger jet and then put cone filter
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Post by kagetenshi on Feb 19, 2018 10:39:23 GMT -5
Might I suggest lowering the clip on the needle in your carburetor. That will allow more air/fuel to flow at wot. If your needle isn't adjustable you can use very small washers that are about 1mm thick to get the same effect.
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Post by KSR Moto on Feb 19, 2018 15:17:20 GMT -5
It is already almost at the lowest setting even if I put it all the way down doesnt that mean that something else is off, or am I wrong?
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Post by KSR Moto on Feb 19, 2018 15:23:53 GMT -5
Update: Now i have both performance air cone filter and performance exhaust, main jet is now 80, still same issue from 3/4 to wot
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Post by scooterpimp on Feb 19, 2018 20:29:13 GMT -5
Usually the 3/4 & up area is main just related.unless your cdi /ignition wont allow advaning past that area (possible ignition issue?) Just tossing ideas out there. Did this issue develop after exaust was replaced?
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Post by KSR Moto on Feb 20, 2018 13:34:21 GMT -5
Issue was still present with stock exhaust, but with performance exhaust it reduced top speed from 70km/h to 60km/h Eventually bigger jet solved the problem now it goes 82km/h 😀
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Post by dexameth on Mar 2, 2018 14:36:35 GMT -5
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Post by GrumpyUnk on Mar 4, 2018 1:21:48 GMT -5
82kph sounds fixed... If not, check that the 'slide', vacuum operated, can move freely and is not stuck. They sometimes get deposits on the needle or emulsifier and stick a bit. It would take some time to get pulled open if sticky. Adding a washer or moving the E-clip to a lower slot on the needle would move the 'base' point of the needle up, thus opening the fuel flow area a bit more. Lowering the needle by removing a washer or moving the E-clip down to a lower slot would make the needle's thicker portion fill the jet square area more, and thus decrease fuel flow. tom
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