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yamaha mono ty 250


whatmore
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hi ....im getting a rebore on my yamaha ty 250 mono could anyone recomend what pistons are available and what modifications if any do i need to do  to make it compatible....Thanks for any replies.

Edited by whatmore
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I remember having a John Shirt 270 conversion / rebore. For me, it was a major improvement in the engine department, a bit more torque and still a nice smooth power delivery. 

Just a thought if it's still available nowadays.

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