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Jeff Policky
Jeff Policky, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 2452
Experience:  Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP
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when i hit the throttle..bogs down..idle fine, hit the gas and it dies

Customer Question

when i hit the throttle on my yamaha 50 raptor 2005 the engine bogs down and quits running! but it will idle fine, hit the gas and it dies! help!!!!!!
Submitted: 5 years ago.
Category: Motorcycle
Expert:  Jeff Policky replied 5 years ago.
will it run with the choke on?
Customer: replied 5 years ago.
Yes
Customer: replied 5 years ago.
yes it idles with choke on.
Expert:  Jeff Policky replied 5 years ago.
how does it run with the choke on and applying the throttle?
Customer: replied 5 years ago.
engine dies
Expert:  Jeff Policky replied 5 years ago.

for testing purposes if you remove the air box cover and air filter will it take throttle then?

Customer: replied 5 years ago.
no!!
Expert:  Jeff Policky replied 5 years ago.

I think you said the spark plug was cleaned or was it changed?

Customer: replied 5 years ago.
cleaned, spark plug less then a year old. color looked good not oily or wet.
Expert:  Jeff Policky replied 5 years ago.
still can be fouled up inside the spark plug. it will only and not move at all because as so as you touch the throttle the unit dies?
Customer: replied 5 years ago.
but we have good spark !
Expert:  Jeff Policky replied 5 years ago.
that good spark changes when it has more resistance to it when under compression.
Customer: replied 5 years ago.
can i clean this plug up or do i need to get a new one in the morning.
Expert:  Jeff Policky replied 5 years ago.
I would recommend a new one so it can be confirmed if it is good or bad.
Customer: replied 5 years ago.
ok,if that dosn`t work whats next ? this happens once a year but the yamaha dealer never tells us what he does, its always an 100.00-120.00 repair bill. just says just needed a tune - up!
Expert:  Jeff Policky replied 5 years ago.
the it happen after the unit has been set for a period of time. then it could be in the carb. how are you cleaning the carb?
Customer: replied 5 years ago.

gum out carb cleaner.

Expert:  Jeff Policky replied 5 years ago.
was the card removed and disassembled to clean and verify all jets and passages?
Customer: replied 5 years ago.
yes! cleaned up spark plug real good, let it idle for about 15 mins. kept gunning the throttle and it eventually cleared up shes running good, thank you!!!!!!!
Expert:  Jeff Policky replied 5 years ago.
sure glad to help.

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