Wiseco Piston Kits Yamaha from IPD Racing — 9 part numbers in stock and shipping from our Texas warehouse. Popular fitments here include Piston Kit for Yamaha FX/FZ 1800cc (8.6:1 Compression) (Standard), Piston Kit for Yamaha VX 1050 (05-12) (11.4:1 Compression) (Standard), Piston Kit for Yamaha FX140/FX140 Cruiser (02-06) (11.4:1 Compression) (Standard). Wiseco has forged its own pistons in Mentor, Ohio since 1941, and every part in this category is built for engines that get used hard, not babied. Each Wiseco piston kit ships complete with the forged piston, ring set, wrist pin and wire locks or circlips, so the top end goes back together in one session. Wiseco forges from 2618 and 4032 aluminum instead of casting, which is why these pistons survive detonation, over-rev and the heat that cracks a stock slug. Measure the bore after the cylinder is cleaned up and order standard only if it still gauges in spec; otherwise match the piston to the finished overbore. Need help confirming fitment for your machine? Call or email IPD Racing before you order — we would rather answer a question than process a return.