Engine overhaul - Kawasaki ZX-10R.net
 2Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 12 Old 12-04-2017, 07:19 PM Thread Starter
Squid
 
Join Date: Dec 2015
Posts: 31
Posting Frequency
 
Engine overhaul

I just did 2 race seasons with my 16 Zx10, about 5000 track/race miles. The motor is still very strong, I don't think there has been any drop of performance, at least my lap times don't say so.
Should I jump on a 3rd season or rebuild the motor? Any of you guys have experience with that many track miles and how well these motors hold up?
cca101 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 12-04-2017, 08:08 PM
WSB Rider
 
Victors's Avatar
 
Join Date: Jun 2013
Location: Michigan
Posts: 557
Posting Frequency
 
Garage
5th gen should last longer than the previous gens. I'd keep it going.

2013 10R
2007 650R
2016 10R
Victors is offline  
post #3 of 12 Old 12-04-2017, 09:07 PM
GP Star
 
thundercoupe9's Avatar
 
Join Date: Apr 2012
Location: ST. LOUIS
Posts: 2,063
Posting Frequency
   
It's cheaper to check and replace worn out parts now than after the engine blows up regardless what gen the bike is.
evallarta1 likes this.
thundercoupe9 is offline  
 
post #4 of 12 Old 12-05-2017, 08:07 AM
gaz
Squid
 
Join Date: Aug 2017
Location: monroe ga.
Posts: 15
Posting Frequency
 
i would run a couple of tests to verify engine condition/performance. pull the oil pan to check for any bearing material, always a good thing to do anyway to clean out any clutch material. check compression balance, and leakdown test to check ring/valve seal. all within limits, go racing with confidence.
gaz is offline  
post #5 of 12 Old 12-05-2017, 09:44 AM
GP Star
 
dricked's Avatar
 
Join Date: Sep 2013
Location: Ontario Canada
Posts: 2,148
Posting Frequency
 
My gen 4 at 4,000km needed all new valves. There’s no warning, the top end will all of a sudden sound like shit.

My rebuild schedule is bottom end every two years and top end every two years alternating so it’s not one big bill at once. Stretching it out until failure will result in a single very large repair bill. Good luck.
dricked is offline  
post #6 of 12 Old 12-05-2017, 12:07 PM Thread Starter
Squid
 
Join Date: Dec 2015
Posts: 31
Posting Frequency
 
Cool thanks guys, sounds like I'm going to pull this engine apart and just do it. The only thing now stopping me now is Kawasaki won't pay out anymore because its a 2016 and I need a 17 or newer. Considering I podium almost every race the contingency pays for pretty much all my racing fees/tires. Decisions....
cca101 is offline  
post #7 of 12 Old 12-06-2017, 10:12 PM
Track Day Rider
 
Newf's Avatar
 
Join Date: Oct 2015
Posts: 126
Posting Frequency
 
Quote:
Originally Posted by dricked View Post
My gen 4 at 4,000km needed all new valves. Thereís no warning, the top end will all of a sudden sound like shit.

My rebuild schedule is bottom end every two years and top end every two years alternating so itís not one big bill at once. Stretching it out until failure will result in a single very large repair bill. Good luck.


I plan to do a full rebuild on my zx10rr at about 4000km, the Thai Kawasaki Sbk team changes valves every 2000km.

If you keep the engine completely stock then they seem to last pretty good but once you add a little extra (race cams) then they donít hold up so well. My teammates just had to have their BSB spec engines completely rebuilt, one lasted just over 4000km and the other bent a valve just under 4000km.



Sent from my iPhone using Tapatalk
Newf is offline  
post #8 of 12 Old 12-07-2017, 12:19 PM Thread Starter
Squid
 
Join Date: Dec 2015
Posts: 31
Posting Frequency
 
Quote:
Originally Posted by Newf View Post
I plan to do a full rebuild on my zx10rr at about 4000km, the Thai Kawasaki Sbk team changes valves every 2000km.

If you keep the engine completely stock then they seem to last pretty good but once you add a little extra (race cams) then they donít hold up so well. My teammates just had to have their BSB spec engines completely rebuilt, one lasted just over 4000km and the other bent a valve just under 4000km.



Sent from my iPhone using Tapatalk
Wow, so shimming the valves isn't enough, actually need to replace the valves completely?
cca101 is offline  
post #9 of 12 Old 12-07-2017, 05:25 PM
WSB Rider
 
Join Date: Nov 2014
Location: Santa Cruz, CA
Posts: 534
Posting Frequency
 
I put on 12k race miles on my gen4. Checked the valves replaced clutches, frequent oil changes. Still runs fine. No engine mods. Just kit ECU and a good map.
gaz likes this.
Lanister is online now  
post #10 of 12 Old 12-07-2017, 08:56 PM
Track Day Rider
 
Newf's Avatar
 
Join Date: Oct 2015
Posts: 126
Posting Frequency
 
Quote:
Originally Posted by cca101 View Post
Wow, so shimming the valves isn't enough, actually need to replace the valves completely?


If it just a bike you use on the road and occasional trackday then no but these are racebikes only I’m talking about. One of the top Superstock racers here has 2 full race seasons on his but we’re not sure what was serviced on it during the first year as it was Kawasaki Thailand Superstock Bike. But most guys are doing preventative maintenance and 4-6000km rebuilds.

The top Superbike guys are running under 3s off Rea’s best race lap and Superstock are about 4-6s, so the pace is pretty quick.

For comparison the Yamaha Thailand Team changed atleast 2 new engines in their Superstock R1 this year and even more last year. Last year they had issues with bent valve on the stocker and Sbk engines, which is why they’ve upgraded the valve springs on the 2017 R1.

I'll ask the Thai mechanics why they change the valves so quickly cause it does sound to quick to me, personally i probably wouldn't change the valves until the 2nd rebuild at about 8-10,000km. On the S1000rr HP kit 1 engines they recommend new valves at 18,000km.


Sent from my iPhone using Tapatalk

Last edited by Newf; 12-07-2017 at 11:28 PM.
Newf is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki ZX-10R.net 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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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