Idle but does with throttle - Club700XX - Honda TRX700XX Forum
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post #1 of 3 Old 06-01-2018, 09:45 AM Thread Starter
Jan
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Idle but does with throttle

I can't figure this one out. I changed out the cylinder to a big bore + stage 2 cam. Now what happens is that it starts rough but it will start. It will idle fine for several minutes (turns off by itself though), and as soon as I apply throttle the engine suddenly looses power and dies (this happens almost instantaneously). I checked the intake and exhaust, no problems there, I'm 95% sure the timing is correct, there's spark with the spark plug, what am I missing? Why would it be idling fine but dies with throttle?
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post #2 of 3 Old 06-01-2018, 10:45 AM Thread Starter
Jan
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So I checked and the fuel system is working properly. The spark plug does have a lot of black sutt around it, but there is spark. Also the engine backfires through the intake when gas is applied
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post #3 of 3 Old 06-01-2018, 10:21 PM

 
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Do you have a programmer?

#1 2008 Honda Trx700xx HMF Performance Exhaust, PCV, Stroked 710cc, 10.5:1 Wiseco Piston, Frt Elka Stage 4's, Fox Podium X rear's, EHS Lid, L8ton 11/16" sway bar, DG 6 Pack Rack, PRM Desert II Bumper & Front Skids.
#2 2008 Trx700xx AMR Reaper, Ehs Big 3, P/P head, Xcalibur Cam, Hard Welded Rockers, +1 In/Ex Valves, +3 Throttle body, 11:1 CP Piston, Elka Stage 3 Legacy Shocks, L8ton 11/16th Sway Bar, PRM Front Skids, Desert II Bumper & Rear Utility Rack.


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