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post #1 of 4 Old 09-12-2020, 02:36 PM Thread Starter
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Pulled out the spark plug to run a compression test on my newly acquired 700xx and found this; some moron installed a Denso IKH20 Iridium plug, this plug has a 26.5mm reach the correct plug is a 19mm reach! amazingly there appears to be no damage to the piston, also the compression is 110 psi. any comments about that?
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Last edited by zedrone; 09-12-2020 at 02:44 PM.
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post #2 of 4 Old 09-12-2020, 11:22 PM

 
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Wow that plug was toast! Hard to believe no damage with the extra length. As far as the compression, sounds pretty high! The manual says 65psi?


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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, 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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post #3 of 4 Old 09-12-2020, 11:46 PM Thread Starter
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Quick, what would cause the compression to be that high?
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post #4 of 4 Old 09-13-2020, 04:46 PM

 
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Quote:
Originally Posted by zedrone View Post
Quick, what would cause the compression to be that high?

Usually carbon build up, either on the top of the piston or in the combustion chamber?

But idk if I'd worry to much about it, I'm pretty sure I've seen others post about compression higher than the manual. Almost as if the manual was incorrect, but I'm not sure?

#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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Last edited by M_Quick; 09-13-2020 at 06:51 PM.
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