Stroker/Big Bore - Club700XX - Honda TRX700XX Forum
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post #1 of 14 Old 03-20-2015, 10:19 AM Thread Starter
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Stroker/Big Bore

Anyone have both? Have a leaky seal on the crank case so if i tear it down I would like to make it a stroker along with the big bore i already have. Looked through the threads and really couldnt find anyone with both along with upsides and downsides of having both. I know when i put the big bore in with headwork it was a night and day difference resulting in having a hard time keeping the front wheels on the ground.
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post #2 of 14 Old 03-20-2015, 02:40 PM
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I have both. If it was a greaqt difference with the big bore then the stroker should be another big difference..
Cant say there are any downsides..
When you put the crank in rotate it with the piston in the bore as the crank may clip the piston skirt, which i resolved by grinding around 3-4mm from the skirt to clear the rotation of the crank..
Other than that, pretty easy.
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post #3 of 14 Old 03-21-2015, 09:35 AM
 
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As above , watch the piston skirt hitting the conrod. The only downside is the programmer I have can't fuel the motor enough in the higher RPM's. Going to a PCV and getting her on the dyno.

Plus side is , I love this setup. Best mod after the Big 3.

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post #4 of 14 Old 07-15-2016, 03:23 PM
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I wish I had known about the piston hitting the counterbalance before I found out the hard way .

I then looked at the older piston that I had taken out , it had been hitting that one as well ,but just barely .

751 ,barker pipe,290 Web cam,+3 stroker,TB bored to 46.8 and moved back from head 1 inch,+3 big bore , +1 intake valves, Hard Welded Rockers,KW springs, ported, clutch mod , air box removed ,Cat oil mod, dynojet commander V w/auto tune , lowered rear end , TRX450R front shocks ,
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post #5 of 14 Old 07-16-2016, 06:09 AM
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does not hit now

751 ,barker pipe,290 Web cam,+3 stroker,TB bored to 46.8 and moved back from head 1 inch,+3 big bore , +1 intake valves, Hard Welded Rockers,KW springs, ported, clutch mod , air box removed ,Cat oil mod, dynojet commander V w/auto tune , lowered rear end , TRX450R front shocks ,
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post #6 of 14 Old 07-16-2016, 07:16 PM

 
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Originally Posted by cataway View Post
I wish I had known about the piston hitting the counterbalance before I found out the hard way .

I then looked at the older piston that I had taken out , it had been hitting that one as well ,but just barely .
So what happened or what damage did it cause? And could you not hear the noise from it hitting, over the rest of the motor noise?

#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 #7 of 14 Old 07-16-2016, 07:33 PM
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what happen is that I put in a stroker crank . after putting the camshaft back I was rotating the crank ,by hand , then there came a sudden stop . to late the damage was done . the piston in the pic is not the damaged one its a different piston ,it has been modified to miss the counter balancer .

751 ,barker pipe,290 Web cam,+3 stroker,TB bored to 46.8 and moved back from head 1 inch,+3 big bore , +1 intake valves, Hard Welded Rockers,KW springs, ported, clutch mod , air box removed ,Cat oil mod, dynojet commander V w/auto tune , lowered rear end , TRX450R front shocks ,
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post #8 of 14 Old 07-16-2016, 09:55 PM

 
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So it was noticeable atleast when turning by hand. I'm just curious because I had a stroker installed by someone else. I have readjusted the valves several times and haven't noticed what you described. Just hear the cam relief. I plan on redoing my top end one day, but hopefully will get another season or 2 on it 1st.

#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 #9 of 14 Old 07-16-2016, 10:52 PM
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rappey had a problem with it .tho I don't know which piston he used and maybe who ever it was that did yours knew what to look for

751 ,barker pipe,290 Web cam,+3 stroker,TB bored to 46.8 and moved back from head 1 inch,+3 big bore , +1 intake valves, Hard Welded Rockers,KW springs, ported, clutch mod , air box removed ,Cat oil mod, dynojet commander V w/auto tune , lowered rear end , TRX450R front shocks ,
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post #10 of 14 Old 07-17-2016, 12:56 PM
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my piston was a vertex, as supplied with the stroker crank and barrel by cylinder works.
A piece of paper was included saying to check the piston skirt clearance, and to grind some out of the crank to crate the clearance...
Since my crank and bearings were already in i decided to file away the piston like you did.
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