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·high speed is not good possible cause
1.inspect ignition incorrect - ignition is wrong
-Touching off coil is wrong
correct -touching off coil is installed incorrectly
2.carburetor oil pipe is ruptured fuel throttles -Fuel tank lacks gasoline
-Oil pipe is blocked
fuel is smooth -Filter is blocked
-Filter net is blocked
-Ventilating hole of fuel tank cap isblocked
3.inspect if carburetor nozzle is blocked block -Carburetor jet is blocked
not blocked
4.inspect distribution mechanis phase not correct -Timing chain is not installed correctly
Correct
5.inspect valve spring too loose -Valve spring is wrong
Normal
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·It is difficult to control
1.If turning is difficult --Turning bearing adjust nut is too tight
--Turning bearing is damaged
2.If one wheel swings --Wheel bearing moves too much
--Rim is bended
--Chain is loose or bended
--Rocker arm shaft bush nut is too loose
--Rocker arm shat bush is abraded exceedingly
--Bracket is bended
3.If scooter inclines one side --Frong wheel and rear wheel have not been adjusted well
--Fork or controlling stick is bended
--Rocker arm or bracket is bended
--Front/rear shock absorber is instable or oil leaks out
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