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3XV O-ring head conversion

3XV O-ring head conversion
3XV O-ring head conversion
£240.00 
SKU: 3XVoringCONV 
Availability: In Stock
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 Yamaha TZR250 3XV Cylinder head o-ring conversion

This is the conversion service for TZR250 3XV cylinder heads from gasket to o-ring as per most more modern machines.

Please note this is a SERVICE only and DOES NOT INCLUDE CYLINDER HEADS
This price is for machining of both heads and supply of a full set of o-rings

Having o-ringed cylinder heads has certain advantages:
O-rings do not need changing every time you take the head off
Heat transfer between head and cylinder are significantly improved
Squish clearance is more consistent
Higher combustion chamber pressures can be accommodated
Far less chance of a leaking water jacket
Replacement o-rings are cheaper than replacement head gaskets

If your cylinders or heads have been skimmed or your porting modified in any way then we will need the following accurate dimensions to ensure that the machining is correct:
Distance from piston crown edge to cylinder gasket face at TDC
Distance from cylinder top gasket face to top of exhaust port

Clearly if you have made radical changes such as changing piston type, bore diameter, fuel used or similar you will have to let us know and give us the details for these changes.


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