Motor blew up, top end rebuild! - Page 5 - Club700XX - Honda TRX700XX Forum
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #41 of 46 Old 10-24-2018, 10:53 PM Thread Starter
Member
 
Join Date: Jul 2015
Location: Cookeville, Tennessee
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
**Update**

Still no progress. I guess i've just been dreading the rebuild process and letting this part stop me. I'm not sure if i should even bother with taking it to the machine shop at this point or if i should just buy a new one. I haven't taken it to the shop to get any quotes or know of the general cost to get something like this done but I know that i've done more bad than good with trying to get the valve guides out. The positive to buying new is obviously everything would be new short of the crank and cam in the engine. Downside would be the 450 dollar price tag. But if i'm going to have to spend 200 on a machine shop for a used part that seems to be very worn, I'd pay the extra to have new. Even though i'd still have to go to the machine shop to have the guides pressed into the new cylinder head. I don't know the best route, i'm definitely on the fences about it and this is the last piece of the puzzle before the long journey of putting this SOB back together.
Attached Images
File Type: jpg image1.jpg (43.6 KB, 17 views)
File Type: jpg image2.jpg (38.8 KB, 18 views)
File Type: jpg image3.jpg (53.0 KB, 18 views)
rebeljake69 is offline  
Sponsored Links
Advertisement
 
post #42 of 46 Old 05-25-2020, 10:25 PM
Member
 
leif's Avatar
 
Join Date: Apr 2010
Location: Richmond Hill, Ontario
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Do we know why some of these bikes have the top end go? Is it an issue with 2008's more than 9's?


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
leif is offline  
post #43 of 46 Old 05-26-2020, 10:23 AM

 
M_Quick's Avatar
 
Join Date: Jan 2011
Location: Columbus, Oh
Posts: 5,770
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 258 Post(s)
Garage
Quote:
Originally Posted by leif View Post
Do we know why some of these bikes have the top end go? Is it an issue with 2008's more than 9's?
It's the design of the "slipper" piston.

Sent from my SM-G930T 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, 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.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
M_Quick is online now  
 
post #44 of 46 Old 05-26-2020, 12:03 PM
Member
 
leif's Avatar
 
Join Date: Apr 2010
Location: Richmond Hill, Ontario
Posts: 31
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Is that a defect with the stock 700xx piston or aftermarket pistons? I thought that Honda would know better, given their 70 years of designing motorcycle engines. A well designed slipper piston should function just as good as a full skirt design.

All I can find is this thread on here.
https://www.club700xx.com/vb/8-motor....html#post9131


Is there any more info on this issue? Any suggestions to mitigate it? The only thing I can think of is poor piston lubrication causing excess wear on the wrist pin or cylinder wall (and then side skirts/rings/ring lands).

Solution is to run high quality oil and change it often?


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Last edited by leif; 05-26-2020 at 12:11 PM.
leif is offline  
post #45 of 46 Old 06-01-2020, 06:48 AM
Senior Member
 
Join Date: May 2015
Posts: 636
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 144 Post(s)
Garage
hey when you brake things you go all out

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 ,
cataway is offline  
post #46 of 46 Old 06-02-2020, 08:23 PM
Junior Member
 
Join Date: May 2020
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
How was the modification going?
autonoob is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Club700XX - Honda TRX700XX Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome