Anyone know the factory position of the cylinder rubber pieces on a 1974 ty 250? I should have taken a photo 3 years ago but did not. I've seen at least 3 different photos. Not a big deal but as a restoration I would like to make it factory correct. thanks.

I've got an unmolested early 434 model motor (never even had the cylinder head off) that I can take photos of, but I suspect that there are actually two different cylinders that came on the first model TY250 so that might be what is causing confusion. One type has a circular un-finned section above the exhaust port. Is that the type of cylinder you have?

Hi, thanks for the reply. no mine is what I would guess is the later version.

Here are photos showing my early 434 cylinder

4 hours ago, jeffk said:

Hi, thanks for the reply. no mine is what I would guess is the later version.

Jeff what number is cast into the port side transfer port area

Thanks for taking the time to take the photos. I appreciate it! I can now see where they go.

 

Jeff

3 minutes ago, jeffk said:

Thanks for taking the time to take the photos. I appreciate it! I can now see where they go.

 

Jeff

You are welcome. I took a series of photos of three different cylinder types many years ago when I was helping someone work out which model cylinder they had on their TY250

And here is one of head before I removed them for clean up.