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View Full Version : Idles fine but bogs when you give it gas?


Redrider99
03-31-2011, 10:49 AM
So last weekend at sleepy my buddys 07 kept crapping out on the track. It idles perfectly fine and if you rev it real slow but when you get on the gas it just dies like someone pulled the teather out. We were working on it yesterday and i tried everything: new spark plug, my new cdi off my practice quad, valves are all in spec, cleaned the carb, and still nothing. The same thing happened to my 05 when i put my new race motor in this year and it was the cdi.Does anyone have any idea what it could be?

Thanks in advance
hondatrxrider07
03-31-2011, 10:54 AM
You might not have the right jet in it, the plug could be bad or needs a valve adjustment. First check all the wiring though.. could be as simple as a loose connection.
eastside 400
03-31-2011, 11:09 AM
jetting should be 170 main, 42-45 pilot, 2 1/2 turns out on fuel screw, i use a OBEKR needle, 55 leak jet and the AP mod. the 55 leak jet and AP mod are the most important for the bog
Redrider99
03-31-2011, 11:14 AM
I'll give it a shot when I go over there tonight for the 2 and a half turns on the screw do I go all the way to the right first or is it reverse threads?
DnB_racing
03-31-2011, 12:00 PM
sounds like dirty carb.

did you take carb apart and clean with carb cleaner and an air nozzle?
Redrider99
03-31-2011, 12:08 PM
Yup took it all aprart and sparyed it with carb cleaner and still nothing
DnB_racing
03-31-2011, 02:16 PM
bad ground connections can cause strange issues also
Grant Casey
03-31-2011, 05:05 PM
try getitng a quick shot ay it works wonders
eastside 400
03-31-2011, 06:20 PM
i dont think that the quickshot really does anything, if you have your jetting setup properly then you should not need the quickshot, it was mainly designed for the very first FCR carbs which had very small holes for the Accel pump
scrappy3
03-31-2011, 06:49 PM
Same thing happened to my son's 06 last year at the track. We found that a scraw had backed out in the carb. not sure what to call it, but if you take the cever off the top of the carb that exposes the slide you will see the screw. when you push the throttle the slide goes up, without this screw it will not go up to let air in.