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Discussion Starter · #1 ·
Hello,
I have a 2006 C50
I recently got a code on my bike of C29, which is the secondary throttle position sensor. I noticed the butterfly flaps would barely move when I turn the bike on, if at all. The bike has been running like hell, dying on idle, not reacting to throttle, backfiring like crazy. I got a resistance and voltage reading from both the sensor and the actuator and all seemed fine.

Could the sensor keep the butterfly flaps from cycling through, or moving at all? When I turn the bike on it sounds like the actuator just clicks, then doesn’t really do anything. I also saw a post on here about disassembling the actuator and re-soldering, and it can fix the actuator (potentially). I’m trying to narrow it down, and see if I can just fix the actuator myself, or if I have to buy a new sensor or actuator. Maybe there’s some cheaper options for a sensor other than $200 on EBay? TIA.
 

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The butterfly valve is actuated by plastic gears. They tend to strip pretty easily and it is unfortunately not an order able part. You have to buy the entire assembly.
 
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