Hesitation under heavy throttle - Club700XX - Honda TRX700XX Forum
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post #1 of 6 Old 03-16-2017, 06:36 PM Thread Starter
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Hesitation under heavy throttle

I just bought my first 700xx from a young kid who rode it hard and put it up wet. When I got it home I did oil & filter, new plug, front brakes, and new UNI air filter. The old plug had copious carbon deposits but nothing I haven't seen before. I decided that since I didn't know the condition or type of fuel in the tank I'd add 2-3oz of Lucas Injector Cleaner to the existing fuel then top it off with 100% 91-octane fresh fuel.

I get it to Rednecks with Paychecks, take it out for a few hours, and when the engine is nice and warm the throttle hesitation begins. I was following my girlfriend on my '96 Fourtrax 4x4 so we weren't going fast on the trials, mostly first gear. The few times I'd be able to pin the throttle, when the engine was warm, it would hesitate. If I didn't let off the throttle and kept it pinned, it would stall. I felt it was the Lucas because I took it out right after I got it, before the tune-up, and it never hesitated.

I'm thinking to keep diluting the Lucas in the tank with fresh 100% gas until my 5-gal. gas can is empty, if that doesn't work run 5-gal. of 98-octane, and if that still doesn't work run a plug that is 1-degree hotter. What are y'alls thoughts?
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post #2 of 6 Old 03-17-2017, 06:05 PM

 
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Originally Posted by bburd88 View Post
I just bought my first 700xx from a young kid who rode it hard and put it up wet. When I got it home I did oil & filter, new plug, front brakes, and new UNI air filter. The old plug had copious carbon deposits but nothing I haven't seen before. I decided that since I didn't know the condition or type of fuel in the tank I'd add 2-3oz of Lucas Injector Cleaner to the existing fuel then top it off with 100% 91-octane fresh fuel.

I get it to Rednecks with Paychecks, take it out for a few hours, and when the engine is nice and warm the throttle hesitation begins. I was following my girlfriend on my '96 Fourtrax 4x4 so we weren't going fast on the trials, mostly first gear. The few times I'd be able to pin the throttle, when the engine was warm, it would hesitate. If I didn't let off the throttle and kept it pinned, it would stall. I felt it was the Lucas because I took it out right after I got it, before the tune-up, and it never hesitated.

I'm thinking to keep diluting the Lucas in the tank with fresh 100% gas until my 5-gal. gas can is empty, if that doesn't work run 5-gal. of 98-octane, and if that still doesn't work run a plug that is 1-degree hotter. What are y'alls thoughts?
If you think it's the fuel, just siphon it out and add fresh. Where are you getting 98 octane?

#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, 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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post #3 of 6 Old 03-17-2017, 07:41 PM Thread Starter
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Red Rock Distributing Company in OKC. They sell all sorts of high octane fuels, they have 98 and higher at the pump. That's not a bad idea with the siphon, can I borrow your lungs and mouth?! ? Any other thoughts I might look into?
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post #4 of 6 Old 03-18-2017, 03:13 PM

 
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Highest we can get at the pump here is 93, which is what I always run in all the quads. Unless I have to top off at the pump while riding in West Virginia. All they have is regular umleaded. I wouldn't run 98 octane in the quad unless it was fully built with a high compression piston. It may do more damage!

Since this issue happened after you did the maintenance, seams weird or just coincidence. Is it acting like it's on the Rev limitor, when it sputters?

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#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, 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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Last edited by M_Quick; 03-18-2017 at 03:15 PM.
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post #5 of 6 Old 03-18-2017, 03:19 PM

 
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And this is the plug another member that builds race quads recommend.



Sent from my SAMSUNG-SM-G870A using Tapatalk

#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, 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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Last edited by M_Quick; 03-18-2017 at 08:17 PM.
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post #6 of 6 Old 03-20-2017, 08:29 AM
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Also, you can get a transfer/siphon pump from Harbor Freight for like $5 if you don't want to start the siphon with your mouth.
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