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Post by gibba1008 on Jan 31, 2015 9:51:11 GMT 1
Can any one tell me what the max oversize pistons can be run in the tzr250 please. At present its on 1.25 oversize. Just working out how many reforest are left. Many thanks |
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Post by tippo on Jan 31, 2015 10:01:36 GMT 1
I would suggest you talk to Grampian motors in Liverpool. They stock all Mitaka pistons and also can advise on the use of alternative pistons if you need a piston size that is bigger than the standard sizes available for your model (if that makes sense).
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db8888
Thrash Merchant
Posts: 329
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Post by db8888 on Jan 31, 2015 11:19:30 GMT 1
Hello youcan get pistons from grampians up to 2.5mm i know of someone racing a tzr250 with 2mm oversize without any problems dont forget to remove some off the power valves or they will hit the pistons
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Post by howard on Jan 31, 2015 21:46:54 GMT 1
Had mine taken out to 282cc by resleeving and fitting DT125R pistons , cost a fortune for not a lot of gain .
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higgsy
Thrash Merchant
Posts: 458
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Post by higgsy on Feb 1, 2015 5:29:34 GMT 1
2.75 is the max overbore, not that easy to find the pistons though. Loads left in those barrels, as well as relieving the powervalves anything over 1.5 mm will need the head gasket opening up to match the bore
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Post by gibba1008 on Feb 1, 2015 13:20:20 GMT 1
Many thanks, now looking at a ypm race tzr and its on .50 so plenty of rebores left in the bank then....
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Post by alexx on Feb 4, 2015 23:15:52 GMT 1
Had mine taken out to 282cc by resleeving and fitting DT125R pistons , cost a fortune for not a lot of gain . Are Dt125R / TZR125 / TZR250 not the 'same' cylinders? |
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