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ty 250 mono bore

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does any one know if i can buy a new bore sleeve for my pinky as its on .75 over size now and would like to rebuild it soon with new piston kit

does any one know if i can buy a new bore sleeve for my pinky as its on .75 over size now and would like to rebuild it soon with new piston kit

I think the sleeve is cast in and would need to be bored out and new sleeve fitted. I am just doing some 320 linners for a ty250.

Jack

does any one know if i can buy a new bore sleeve for my pinky as its on .75 over size now and would like to rebuild it soon with new piston kit

They can be re-sleeved - Nigel Birkett (Birkett Motosport) can help. You can bore them out quite a way though - again Nigel does re-boring and can source the pistons - he has got a lot in stock.

Best wishes - Alan

You can bore them to 260 or 270cc so no need to resleeve at this moment.

You can bore them to 260 or 270cc so no need to resleeve at this moment.

When i had mine i had it bored to 270 and had the inlet manifold shorteded and porting done. Once rejetted the bike was probably the best bike i have ever had and i now wish i had never sold it. :thumbup:

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I think the sleeve is cast in and would need to be bored out and new sleeve fitted. I am just doing some 320 linners for a ty250.

Jack

what material are you using to make the linner s

what material are you using to make the linner s

grade 300 is what i was recomended by supplier. Its not easy to sorce as most suppliers stock 250.

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