Looks like a cylinder repair will be in the works. What bike is this?

Drop me a PM with prices for a set of pegs.
thanks
Ken

2007 KTM 300 XCw.. I told him to go up one size on the pilot jet! :doh:

I could be wrong but it looks like there is a cracked port. If the port cracks then it will suck in air and seize on off throttle.

Millenium Technologies fixes cylinders really good.

I don't really think it was the jetting... even the manual recommends a 35 pilot at 30 degrees F. I put a 42 in it in Sept.... I don't think raising the needle 1 click would have prevented melting my piston.

Also, the main is a 165, stock is a 162. My jetting is richer than the exact same motor I has running next to, but he runs more oil in the gas. I had 50:1 to start with and probably screwed up at the gas station, running it even leaner.

guess I was due for one :nopity:
I haven't blown up a bike since 1990 and even that was just experimenting with base gasket changes and squish rings.

I think what you saw was casting flash. I'm going to clean that off before the I send out the cylinder.
I wish I could blame it on that... right now, I'm blaming myself :wtf: :lol:

Planning to send it to powerseal as soon as my head and piston come back.

Ken,
Are you doing a "factory" rebuild or making any changes while it's opened up?
I hear the TZs are pretty hot as-is.

More than likely it will be kept to stock specs. I may opt to have some head work done on one of my older sets of heads. I have one NEW set of OEM heads going into the motor and I would like to have a spare set machined to match them as a backup. While the motor is there, I will more than likely be needing at least one of my cylinder sets to be replated before the start of next season.
Its gets expensive pretty quickly. I am quite happy with the power to weight ratio of the TZ250 as is. I can only expect it to run better just with the simple rebuild. I don't plan on doing much actual racing, so the extra engine mods are not going to be cost effective for me. If I were to race one, i would probably opt to purchase a newer version of the bike.

Ken

Motor is out, now I have to find a suitable shipping container.
Ken

Ken how big is the motor? Find a plastic container barrel that they use to ship stuff in.

Something like this http://images.google.com/imgres?imgu...n%26safe%3Doff

The motor is pretty small. I was going to try Home Depot and grab a plastic storage bin and pad the motor inside of one of those if I can find one that will hold up to the trip in both directions.
I will probably use that foam insulating spray inside a plastic trash bag to make a custom fit pad to protect the motor. I ordered a replacement rim for my Explorer once and the new rim came sandwiched between two trash bags filled with foam insulation. The bags contained the foam, but the foam formed perectly around the part and once it hardened, it protected the new wheel. The same should work great with the motor.
My only concern is finding a container that will stand up to the round trip.
Ken

A square container would probably work better.
Ken

Alot of people use a cooler.:ride:

Just got the TZ250 cylinders back from re-plating. Should be getting the motor back together in a week or so.
New heads too..should be good to go for my first track day in April.
Ken
http://i20.photobucket.com/albums/b2.../TZ250/006.jpg
http://i20.photobucket.com/albums/b2.../TZ250/005.jpg
http://i20.photobucket.com/albums/b2.../TZ250/007.jpg