The combustion chambers listed are the most popular for road use with 98 octaine E5 fuel
please call if you want something different or need help choosing a option.
Please note if buying a head set you will need to order 2 inserts at £48.98 incl vat each.
These inserts are for the RS250 Aprilia 1995-2002 and the Suzuki VJ21 1988-1991 & VJ22 1991-1996
Piston centre of crown height -0.35mm from the top of the cylinder at TDC
squish clearance 0.90mm
Volume incl spark plug hole
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