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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance.

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  #1  
Old 03-07-2009, 09:57 PM
dmr00000 dmr00000 is offline
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Default Engine Starts but when throttles..nothing

I'm new to engines and my engine was doing great all day, but then towards the end, I shut it down, then when I tried starting it back up, it did, but when i throttled it, it sounded like a mini-rev and nothing happened...any idea's whats wrong?
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  #2  
Old 03-07-2009, 10:44 PM
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Spunout Spunout is offline
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Default Re: Engine Starts but when throttles..nothing

check all your wires and intake/carb nut tightness.
and make sure your throttle cable isnt coming unscrewed from the top of carb.
is the spark plug tight?
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Old 03-07-2009, 11:06 PM
dmr00000 dmr00000 is offline
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Default Re: Engine Starts but when throttles..nothing

i completely took apart the carb and screw everything back nice and tight, still nothing.
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  #4  
Old 03-08-2009, 12:26 AM
saolom saolom is offline
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Smile Re: Engine Starts but when throttles..nothing

might be

choke

spark

oil fuel mix

good luck
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  #5  
Old 03-08-2009, 12:12 PM
Large Filipino Large Filipino is offline
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Default Re: Engine Starts but when throttles..nothing

Clogged exhaust.
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  #6  
Old 03-08-2009, 12:16 PM
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Bikeguy Joe Bikeguy Joe is offline
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Default Re: Engine Starts but when throttles..nothing

"Sounded like a mini-rev"? Has the throttle cable or associated parts dis-connected?
It starts and idles fine, but the throttle will give no response?
Details please.
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Old 03-08-2009, 09:55 PM
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Default Re: Engine Starts but when throttles..nothing

yes...can you be alot more specific?

is the choke all the way on the 'ON' position? if so, it will start for a second or so, then might die.
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  #8  
Old 03-08-2009, 11:32 PM
dmr00000 dmr00000 is offline
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Default Re: Engine Starts but when throttles..nothing

No matter what position the choke is in..nothing happens, and yes it starts..but if u stop pedaling, or the bike isn't moving, then engine just dies.
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Old 03-09-2009, 12:25 AM
gofast gofast is offline
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Default Re: Engine Starts but when throttles..nothing

Does the engine actually start..or is it just the sound of the engine turning over due to the momentum of the bike. Sounds like it could possibly be a coil/mag problem-not firing.
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  #10  
Old 03-09-2009, 03:02 AM
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MB-Monkey MB-Monkey is offline
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Default Re: Engine Starts but when throttles..nothing

i agree does not sound like the motor is starting at all i would def start with making sure it sparks if you have spark and fuel then i would look for air leaks
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