Broken crankcase, can I fix it myself? - Club700XX - Honda TRX700XX Forum
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post #1 of 140 Old 11-27-2017, 07:53 AM Thread Starter
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Broken crankcase, could I fix it myself?

Long story short, I blew my motor and now thereís a hole right where the balancer is supposed to be on the right crankcase. So, I would basically need to buy a new right side crankcase and transfer or replace everything to it and I wanna know if it's doable to do myself even though I donít have much knowledge as to how I would do that. I have the service manual but want to know your guysí opinion if itís something thatís possible. Thank in advance.

Last edited by Kubi07; 11-27-2017 at 08:16 AM.
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post #2 of 140 Old 11-27-2017, 04:59 PM
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R&R of the motor is a pain in the arss if you ask me . I plan on doing it my self again this winter . for you it would be a great time to do some mod's

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 #3 of 140 Old 11-27-2017, 05:13 PM Thread Starter
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Had a feeling it would be a pain, but is it doable for an a average Joe though? And what can I upgrade once I have the thing open? It'll be a perfect time to do so. Thanks.
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post #4 of 140 Old 11-27-2017, 07:54 PM
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install stoker crank . may want to replace oil pump , cam chain

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 140 Old 11-27-2017, 08:28 PM Thread Starter
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Like, replace those with aftermarket or OEM? And how about a big bore kit? Also, what special tools would I need?
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post #6 of 140 Old 11-27-2017, 09:15 PM
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Can install a big bore later. That does not require pulling the motor and splitting the cases. The crankshaft does. Hot Rods +3mm. Do a search on this site. You may need to notch the piston skirt for the connecting rod. Cataway has some pictures of how he notched his piston for clearance.

This is the cheapest I found the stroker crank.

TRX700XX Hot Rods Complete Bottom End Kit

2008 700xx with lots of goodies.
Part time IATVHSS racer (when time and $$ allow)
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post #7 of 140 Old 11-28-2017, 07:38 AM Thread Starter
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Yea, you’re right. Are there any other options out there for the stroker? I don’t mind spending more for a better bottom end kit. I just don’t know which ones are good.
What do you mean about notching the piston skirt? I’ve tried looking for cataway’s thread but couldn’t find it.
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post #8 of 140 Old 11-28-2017, 03:46 PM

 
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Originally Posted by Kubi07 View Post
Yea, youíre right. Are there any other options out there for the stroker? I donít mind spending more for a better bottom end kit. I just donít know which ones are good.
What do you mean about notching the piston skirt? Iíve tried looking for catawayís thread but couldnít find it.

https://www.club700xx.com/vb/8-motor-...-big-bore.html

#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 140 Old 11-29-2017, 09:27 AM Thread Starter
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Thank you M_Quick. Upon reading that thread another question came up. Would I need a fuel programmer if I install the stroker? The ATV right now is all stock except for the K&N air filter. So I don’t have an exhaust or fuel programmer or know how well to use one.
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post #10 of 140 Old 11-29-2017, 03:16 PM

 
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Originally Posted by Kubi07 View Post
Thank you M_Quick. Upon reading that thread another question came up. Would I need a fuel programmer if I install the stroker? The ATV right now is all stock except for the K&N air filter. So I donít have an exhaust or fuel programmer or know how well to use one.
I would have to say yes. And if you purchased the controller through EHS racing, just let Eric know your list of mods, and he probably would pre program the controller for you with the proper map needed.

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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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