Project 727 Big Bore - Club700XX - Honda TRX700XX Forum
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post #1 of 51 Old 02-24-2010, 08:04 PM Thread Starter
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Project 727 Big Bore

It is important when re sleeving the Honda cylinder to reinforce between the bore and the outter casting. From the factory there is no support between the bore and the outside perimeter of the cylinder. Most cylinders have some sort of bracing in the water jacket to improve it's structural integrity. We first mill pockets in the water jacket between the bore and the outside of the cylinder. We then press in cross drilled dowels for support. These dowels are cross drilled for water flow and welded at the top of the cylinder. We next bore out the cylinder and drop in the new 105mm sleeve. Then we bore and hone the cylinder to match our CP piston, and then lastly we deck the top of the cylinder to ensure a flat sealing surface for the head to mate to.

$629.99 with cylinder exchange, also includes 13:1 CP Piston
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post #2 of 51 Old 02-24-2010, 09:42 PM
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nice......have u put it on a dyno with this set up..... will u offer a lower comp piston so it can run on pump gas

Last edited by 700xxmaniac; 02-24-2010 at 11:45 PM.
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post #3 of 51 Old 02-24-2010, 09:42 PM
 
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I can see with the open deck that there is less strength but have you done any testing with those supports. Is it possible that with a hard session of riding that the motor would overheat since the coolant slows passing through the supports? I like what you're doing, this is awesome. I can't wait to see some dyno charts and field testing...


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post #4 of 51 Old 02-24-2010, 11:05 PM
 
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Originally Posted by 700xxmaniac View Post
nice......have u put it on a dyno with this..... will u offer a lower comp piston so it can run on pump gas
THIS.



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post #5 of 51 Old 02-25-2010, 12:27 AM
 
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bored out and 13:1 i wanna see some big dyno numbers here!!

ENGINE:(57.87HP-LTP DYNO)12:1CP,STAGE 3 HOT CAM, PORT/POLISHED HEAD,HDD +3 TB, DMC AFTERBURNER FULL EXHAUST,PCV,MODQUAD K&N FILTER/MODIFIED AIR BOX,13T
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post #6 of 51 Old 02-25-2010, 12:43 AM
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wow looks cool is he trying to sell this to us or is that what he paid for it??? do I need a pc5 to run this or can I run it stock tuning??
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post #7 of 51 Old 02-25-2010, 02:32 AM
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wow awesome would love to see some dyno sheets
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post #8 of 51 Old 02-25-2010, 04:53 AM
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I was thinkin someone was gonna have to do or make a wet sleeve for it but this is close enough. Like the B series Honda engines(and others), alot of shops wet sleeve the blocks.

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post #9 of 51 Old 02-25-2010, 05:53 AM
 
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Quote:
Originally Posted by xx700xx View Post
I can see with the open deck that there is less strength but have you done any testing with those supports. Is it possible that with a hard session of riding that the motor would overheat since the coolant slows passing through the supports? I like what you're doing, this is awesome. I can't wait to see some dyno charts and field testing...
The head isn't open as the cylinder is, there are only about six holes in the head the coolant flows into. I would like to see allot of hours in this particular design though. With the dowels welded and staggared unevenly stress fractures may accour.

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post #10 of 51 Old 02-25-2010, 08:21 AM
 
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