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Vertex - Piston Kit (Yamaha)
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Vertex Pistons Kits (Yamaha)
Vertex is an premier brand of aftermarket replacement pistons that offers high quality performance parts at an affordable price. With a dedicated team of powersports enthusiasts and influences from factory race teams, Vertex is able to deliver riders of all skill levels with reliable, race ready, piston kits. Although they manufacture their piston kits in Italy, Vertex is still able to provide customers around the world with some of the best Yamaha replacement pistons and Yamaha piston kits at some of the lowest prices on the market.
Choosing your next piston kit is made easy with the wide variety of piston bores and piston styles that Vertex offers. Each piston kit made is precisely machined to match your cylinder bore in order to maximize both power and performance! It doesn't matter if you are an elite racer, a weekend warrior, or just riding for fun, having a reliable engine is something every rider needs and Vertex is here to get you dialed in.
Yamaha Vertex Piston Kits:
- All piston kits include:
- the piston & rings
- the wrist pin & circlips
- All pistons are:
- Heat treated with a T-6 hardening & tempering cycle
- T-Box forging from 4032 aluminum alloy
- Precisely machined to match your cylinder bore to maximize power & performance
Yamha Vertex Piston Kit Options:
Forged Replica Piston
- standard bore piston with stock compression ratio (12.8:1 for the 2018 YZ450F)
Forged High Compression Piston
- high compression ratio (14.6:1 for the 2018 YZ450F)
- increased performance
Forged GP Racer's Choice Piston
- high compression ratio (13.3:1 for the 2018 YZ450F)
- maximizes power & performance
- unique profile, design, & shot peened dome
Vertex Piston Kit Installation Tips:
After disassembling the cylinder head and the cylinder, it's necessary to measure the actual cylinder diameter (1), using a dial bore gauge.
When actual bore size is known then it is time to pick the right VERTEX piston to fit your bore size, respecting the clearance suggested with the cylinder (i.e. CRF450 clearance 0.05 mm).
Attention must be paid to any markings (i.e. T) on the rings surface: always position the ring with the written part on the top side.
To assemble the rings on the piston you must start from the oil ring and introducing as first the spring (2) paying attention to not place one on the top of the other the two extremities.
After setting the two foils one up and the other down at direct contact with the groove, taking care that the open tips must be at 1200 from the spring open tips.
We are now ready to assemble the compression ring(s) into the piston groove(s): first of all pay attention to not crush or damage the ring during installation, every precaution should be taken not to compromise the ring integrity with the groove and to not reduce the rings retaining pressure.