KX Riders

Maintenance & Technical => KX500 Original => Topic started by: JustinSB on September 16, 2009, 06:28:26 PM

Title: Is this piston good?
Post by: JustinSB on September 16, 2009, 06:28:26 PM

It looked to me like it started to seize, but I thought it might just be carbon because it is in the areas which line up with the exhaust ports. It is a cast piston, which bothers me. Any comments are appreciated. Thanks!

(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd001.jpg)
(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd002.jpg)
(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd003.jpg)
(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd004.jpg)
(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd005.jpg)
(http://i481.photobucket.com/albums/rr175/JustinrSB/KX500TopEnd006.jpg)

Title: Re: Is this piston good?
Post by: cyclepsych0 on September 16, 2009, 06:49:21 PM

From the photos, the scarring seems excessive... If it were my bike I'd definitely replace the piston and check the nikasil coating for any flaking. 8-)

Title: Re: Is this piston good?
Post by: KX500freak on September 16, 2009, 10:43:08 PM

yes same here ,and replace piston earlier next time ,this one seems almost polished :P

Title: Re: Is this piston good?
Post by: JustinSB on September 17, 2009, 04:24:37 AM

A new one is going in. I just got the bike. I'm glad I caught it before it was worse and did cylinder damage or disintegrated.

Title: Re: Is this piston good?
Post by: flyin9 on September 17, 2009, 05:31:54 AM

were your rings welded in the gap or do they move freely? looks like you KIPS are very gummed up or not operating correctly, or both. JMO
Jared

Title: Re: Is this piston good?
Post by: kaw rider on September 17, 2009, 03:56:42 PM

you may what to look at that one stud, looks alittle rusty. Notice how the burnt oil on exhaust side of piston only. That tells you something.

Title: Re: Is this piston good?
Post by: JustinSB on September 17, 2009, 05:11:34 PM

What does the oil on the exhaust side only tell me?