CT1 Piston

[3858]

I have a job in the shop at the moment with a nice CT1 engine....  Engine number DT1-164685

Customer wanted a full inspection and re-build.... 

Question is are the Wiseco pistons available going to be satisfactory or should I chase a NOS kit appropriate to the size needed.

I remember in the IT days the Wiseco was different in the intake window but worked?

[crossedup2]

The DT1 is a 250cc motor, given the engine number, is a DT2 (I think) with a reed valve. The CT1 is a piston port, CT2 are windowed piston reed valve motor.
250 and 175 pistons (reed valve) a still available and are still via yamaha or evilbay. Wiseco Pistons for DT175A or DT250A would work (in the right engine)!

Peter B

[3858]

Thanks crossedup2 ...awesome info.  I'll try the genuine Yamaha route via the Frame number....

It has a L shaped ring (top), Two hole piston window,  and Alloy reed block so you are on the money..

[TT5 Matt]

should be plenty of pistons/rings on ebay still

[mitch75]

That L shape ring is a dyke ring