TT250 barrel

[Gerard De Ruyter (Twistandshout)]

After a decent barrel for a 1980-81 TT250.  Hoping to find one on second or third oversize (for which I have pistons).

Also after a few other bits - front sprocket cover being one.

[Graeme M]

This one looks OK?

http://www.ebay.com.au/itm/1980-YAMAHA-SR250-SR-250-ENGINE-CYLINDER-BARREL-JUG-/260844399491?hash=item3cbb89ab83:m:mEiznzf6HdDDhbOmdh7YJrg

[oldcol]

I had a sr250 barrel stated 239cc on the side instead of 249cc. It would pay to check before buying that one. Col.

[Gerard De Ruyter (Twistandshout)]

Hmmm.  That begs the question, can you bore the SR barrel out to all the TT sizes - get it back to standard?

[oldcol]

Hole in top of crankcases is 82.3mm, assume this would be outside diameter of sleeve. I only have bottom end of sr250, don't have the barrel to measure. Hope this helps, Col.

[Gerard De Ruyter (Twistandshout)]

Thanks Col, never know when that info might be useful.  But good for the moment - local bike wrecker had a good XT250 barrel on second oversize, with serviceable piston and rings thrown in!  Which is terrific, as will use my higher comp TT piston in it, and have a third over piston and ring kit for if/when.

[shelpi]

are the 1984 barrels for the xt tt Dohc the same as 1991 Dohc jug

and are xt tt 250 Sohc same as the Dohc jug ?

thanx

[Gerard De Ruyter (Twistandshout)]

Sorry, no idea about the dohc tt's.  the sohc and dohc jugs are quite different - sohc has four compared to dohc's six barrel studs.

[shelpi]

thanks