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A high-performance and high-quality 105cc ø53mm Big Bore ATHENA kit for your Yamaha YZ 85 motocross bike from 2019
Under the ATHENA Racing brand ( ATHENA is none other than the EUROCILINDRO group, one of the largest high-end foundries in Italy).
This kit consists of a cylinder with high-end aluminum coating and treatment, a two-segment piston, seals and accessories. It is delivered without cylinder head. With its diameter of 53mm, it still offers 105cc real!
Its architecture and its finish are obviously very very good, its exhaust outlet is significantly improved and enlarged, with bar and above all, with valve for maximum torque at low revs, and power at high revs.
The piston is a high-end model in mono-segments, it favors high revs, very stressed on this kind of machine.
Of course delivered 100% complete as presented with its needle cage, high quality aluminum cylinder, VERTEX mono-segment piston, reinforced engine gasket pack... but also its high compression cylinder head.
As an option we offer you a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, it increases the performance of the cylinder. An improvement of the piston and the lower skirts is also included in this modification. Count a little extra time for this preparation!
Mounts on Yamaha YZ 85 - 2019/2023
Specific References
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A high-performance and high-quality 105cc ø53mm Big Bore ATHENA kit for your Yamaha YZ 85 motocross bike from 2019
