Cylinder shims kit 8.1, R1.8 100cc, version 2021, for combustion chamber, metal color sp. 0.10mm, brass color 0.05mm thick (10 pieces per pack).

It allows you to calibrate the squish effect and the compression ratio of the combustion chamber, leaving the other parameters of the cylinder unchanged (height of transfer ports and exhaust). Products intended exclusively for competitions, forbidden to use on the road. We decline any responsibility for improper use. Made in Italy product.