KX Riders

Maintenance & Technical => KX250 / KX125 => Topic started by: Actionman on April 12, 2015, 06:40:38 PM

Title: is my 2000 kx250 cylinder junk?
Post by: Actionman on April 12, 2015, 06:40:38 PM

I was getting ready to put my engine together and looked at the liner in my cylinder for problems. I found a big chunk missing from one of the transfer port bridges. I sanded it down to smooth out the missing piece and now the bridge is noticibly thinner than the other sides. Is this usable or not? Untouched side : (http://i1239.photobucket.com/albums/ff515/actionman1972/Mobile%20Uploads/20150412_214228.jpg) (http://s1239.photobucket.com/user/actionman1972/media/Mobile%20Uploads/20150412_214228.jpg.html)
Damaged side: (http://i1239.photobucket.com/albums/ff515/actionman1972/Mobile%20Uploads/20150412_214245.jpg) (http://s1239.photobucket.com/user/actionman1972/media/Mobile%20Uploads/20150412_214245.jpg.html)

Title: Re: is my 2000 kx250 cylinder junk?
Post by: TwiceDead on April 13, 2015, 03:13:30 AM

Do ports in cylinder line up with sleeve?  Looks to me like it  Could be bad port matching or a bad port Job.  I don't think anything with the engine can reshape the ports like that.

Title: Re: is my 2000 kx250 cylinder junk?
Post by: Actionman on April 13, 2015, 03:58:08 AM

Ports are lined up with the sleeve well. The bike had been seized when i got it and the piston was mangled pretty badly.

Title: Re: is my 2000 kx250 cylinder junk?
Post by: dan580,95 moto on April 13, 2015, 09:27:53 AM

I'm no expert but I'm a mechanic for 22 years, personal opinion, it will run but its a pretty thin line to keep the ring pushed back on piston, i think it will wear fast.

Title: Re: is my 2000 kx250 cylinder junk?
Post by: Actionman on April 13, 2015, 11:00:14 AM

It wont be ridden much anyway. I will eventually get another cylinder but if I can get a light trail ride once a week for a few months then im fine.