Rieju & GasGas Legacy Riders Club Forum  

Go Back   Rieju & GasGas Legacy Riders Club Forum > GasGas Enduro Technical Forums > Enduro Engine - 2 stroke

Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc.


Reply
 
Thread Tools Display Modes
  #1  
Old 11-05-2017, 01:25 PM
touringhornet touringhornet is offline
Member
 
Join Date: Oct 2017
Posts: 11
Default Is it time for plating!?

Hi all,

Recently bought a 2010 ec250 six days and having taken the head off to check piston (around 80 hours green laning im told) i discovered one line of scoring above the exhaust port. I can feel it with my nail. The piston is not worn in that area as such, there is just general blow by on the rings from an old piston. Can i get away with a new top end kit or should this be plated? The rest of the cylinder still has the factory crosshatching on it!

Thanks
Mike
Attached Images
File Type: jpg 20171105_155127.jpg (128.5 KB, 72 views)
File Type: jpg 20171105_150409.jpg (118.5 KB, 68 views)


Reply With Quote


  #2  
Old 11-05-2017, 09:19 PM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

Is it aluminum on the surface of the plating or is it a scratch into the surface?
Reply With Quote
  #3  
Old 11-05-2017, 11:22 PM
Motorman_55792 Motorman_55792 is offline
Member
 
Join Date: Oct 2017
Location: Northern Minnesota
Posts: 67
Default

Try a little muriatic acid on it to see if it will remove it. I would consider a replate if it doesn't come clean, but as my old boss always said, "we've won world championships on worse than that!"
Reply With Quote
  #4  
Old 11-06-2017, 01:31 AM
touringhornet touringhornet is offline
Member
 
Join Date: Oct 2017
Posts: 11
Default

It does clean up a bjt but thats mostly scoring i think. Attached another picture which i think shows it better. Im wondering if i can get away without making it worse until next top end time...
Attached Images
File Type: jpg 20171106_072902.jpg (117.8 KB, 60 views)
Reply With Quote
  #5  
Old 11-06-2017, 03:11 AM
Anders's Avatar
Anders Anders is offline
Gold Level Site Supporter
 
Join Date: Nov 2009
Location: Kongsberg, Norway
Posts: 1,113
Default

Quote:
Originally Posted by touringhornet View Post
It does clean up a bjt but thats mostly scoring i think. Attached another picture which i think shows it better. Im wondering if i can get away without making it worse until next top end time...
If the previous owner ran it like this, I guess you could also
But to me, it seems like a damage that has to be fixed. From the latest picture, it seems like the plating is worn through and you look into the cast aluminium. But images can be difficult to interpret.
__________________
Anders

"So you know, that you're over the hill when your mind makes a promise that your body can't fill" (Little Feat: Old Folks Boogie)

2015 EC200 Racing: TE bars, Rekluse Core Exp 3.0, 38mm Lectron & Ohlins S3 steering damper
2006 EC200: 2011 plastics, Rekluse Z-Start, revalved KYB forks & Scotts steering damper
1998 Bimota Supermono
1986 Duc Mille S2
1975 Guzzi sidecar hack
1961 Morini Corsaro 125
etc
Reply With Quote
  #6  
Old 11-06-2017, 03:55 AM
touringhornet touringhornet is offline
Member
 
Join Date: Oct 2017
Posts: 11
Default

As much as i want to sling a new piston in and hope it works so i can get out quicker, i think its wise to send it off for plating so i get a trouble free winter (with any luck!)

Thanks all for your advice.
Reply With Quote
  #7  
Old 11-06-2017, 01:15 PM
Zman's Avatar
Zman Zman is offline
Platinum Level Site Supporter
 
Join Date: Apr 2010
Location: Burbs of Chicago
Posts: 1,818
Default

If it is not a gouge you can also have it diamond honed lightly.
Reply With Quote
  #8  
Old 11-07-2017, 06:09 AM
risk74 risk74 is offline
Senior Member
 
Join Date: Jun 2016
Posts: 240
Default

Quote:
Originally Posted by Anders View Post
From the latest picture, it seems like the plating is worn through and you look into the cast aluminium. But images can be difficult to interpret.
What he said. Certainly looks like the plating has come off/worn through. If I had to get away with it for a race or two I probably would, but it's not going to fix itself.
Reply With Quote
Reply



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Cylinder Plating to Matched Piston ?? GasGasDreamer Enduro Engine - 2 stroke 6 01-13-2014 10:10 PM
plating a ec300 in MO tsmith Central United States 3 03-04-2012 03:59 PM
Nikasil plating Rabbitist Enduro Engine - 2 stroke 6 11-21-2011 11:28 AM
Millenium Tech Cylinder Plating Review Stoby Enduro Product Reviews 16 11-18-2011 07:51 PM
Plating (license, not chrome) Thread twowheels Suggestion Box 5 09-06-2010 03:43 PM




All times are GMT -5. The time now is 03:38 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright 2009 - GasGasRider.org