Spears Racing Overbore 339.43cc Piston Kit  have been designing and making race pistons with the State of the Art CNC Machining and manufacturing alliances with CP Carrillo for decades. Manteca, California 95336 US. Classes that were once full of highly competitive R3s, Ninja 300s, and KTM 390s, were thrown together with the new Ninja 400, which was clearly in a … Spears Racing Overbore 339.43cc Piston Kit Complete This is a complete engine kit, +2mm over stock bore High Compression piston kit (339.43cc). There is no return on Electrical or Power Commanders. Clutch Covers. Bore: 44mm; Stroke: 43.6mm Gaskets. Millennium stands behind our plating with a LIMITED LIFETIME WARRANTY. At the forefront of performance, piston manufacturing has been a result of continuous research and development both in the dyno room and on the race track winning championships all over the world. Kitaco NEO 181cc Big Bore Performance Kit (WITH Forged Crank Shaft) - '19-20 Honda Monkey 125 (NO Fuel Controller) 212-1432810 IN STOCK $997.00 Add to cart Details Working with specific roadracers, Spears Racing became a recognized force in AFM, CCS, WERA, AHRMA, LRRS and AMA competitions. 88. Cam Covers. BREMBO BRAKE ROTOR SUPERSPORT 310m Diameter Ninja 400cc, Kawasaki Ninja 400 Slipper Clutch Extra Plate Design 2018/2020, Kawasaki Ninja EX400 Brembo Brake Caliper With Mount, Kawasaki Ninja EX300 Overbore+2 mm Piston Kit 315.26cc Kit, Kawasaki Ninja 400 Linear Spears Racing Steering Damper Kit Complete. Step 3: You always want to run an engine to warm it up before doing an oil change. Order Now Yamaha Big Bore Kits - 4 Stroke ATV. Engine Hardware. It’s the 1970s. In 1991 after leaving the San Jose Police Department, Spears Enterprises was opened in Campbell, California. Overbore 339.43cc Piston Kit: This is the new 2 Ring FSR Slipper Skirt forging Piston made for Spears Racing  by CP Carrillo. Spears Racing Piston Kits have been winning races and Championships all over the world for over 4 decades. Spears Racing pistons have been in several of the race wins in close course racing and in road circuits in Europe and has won the Isle Of Man TT Twins race several times. Shop thousands of Yamaha R3 Parts at guaranteed lowest prices. You want the highest quality products, but you don’t want to have to pay the highest prices. Yamaha YZ450F 2006-2009 Wiseco Top End Rebuild Kit Standard Bore 95.00mm, 12.5:1 (Fits: Yamaha) 5 out of 5 stars (1) 1 product ratings - Yamaha YZ450F 2006-2009 Wiseco Top End Rebuild Kit Standard Bore 95.00mm, 12.5:1 Copyright 2021 © Spears Racing.Managed by Webganics, LED PITBOARD WITH QWERTY KEYBOARD FOR OPTIMAL PIT STOPS, SPEARS RACING BUILDS ENGINES THAT WIN CHAMPIONSHIPS. Since the release of the Ninja 400 in 2018, small bike racing has been pretty disrupted. BikeBandit.com is your destination for R3 OEM parts, aftermarket accessories, tires and more. 3.0 out of 5 stars 1 rating. 254. Utilizing State of the Art CNC machines for manufacturing, along with purpose-designed forgings, while being able to maintain exacting specifications on each and every piston – holding tolerances to millionths of an inch.This is the new forging that is lighter than stock OEM Pistons. Each Kit comes with a OEM Yamaha base and custom plus 2mm over  head Gasket to a special thickness . They stock OEM cylinder is bored and the cylinder is inspected and coated with a  proprietary Nickel Silicon Carbide (NSC) cylinder plating process and cylinder services. (209) 923-4684 It was soon apparent that his attention to detail was valuable to the industry, and decided to start working on motorcycles in his off-hours. Exhaust. By this time the business had established itself as the leader in police motorcycle maintenance, having as many as 12 different police departments relying on Spears to meet their demands. Puig Rear Tire Hugger Yamaha R3 / MT-03 $ 153. Blockoff Plates. Thirty-five of the 42 years, Spears has been the leader in motorcycle maintenance, 27 years of motorcycle roadracing support and team management with Spears Enterprises/Spears Racing. 31. Malossi LC 4Stroke Big Bore Cylinder Kit Features. We found the best results were acheived by adding a couple of washers as shown in this video. Spears Racing has also expanded their efforts to include several racing venues across the U.S. and into Australia, Ireland, Germany, New Zealand, and the United Kingdom winning numerous International Championships while continuing to expand their racing support in the years to come. Yamaha YFM 350 Warrior 366 400 446 cc Big Bore Stroker Carb Stage 1-3 Jet Kit Visit the 6 Sigma Store. Also in that year another Race team based out of Germany ran the multi race German TT series, with a lot of dedication,long days and nights, Team NK Motors with rider Felix Klinck came away with the over-all Championship on a Spears Racing Based Kawasaki ER650. GYTR full engine kit YZF-R3 19> (B7P-RACE3-19-00) (PLEASE NOTE: delivery time on GYTR parts is about a week).  15253 S Inheritance Way HotRods rod kits Crankshaft Bearings 4 Stroke Big Bore Kits HotCams Camshafts Valves and Spring kits Timing Chains Top end bearings Complete engine gaskets Top End Gasket sets Honda cylinders Kawasaki cylinders KTM cylinders Suzuki cylinders Yamaha cylinders 4-Stroke Heads 2 Stroke Big Bore Kits Complete engine seal kits Clutch - baskets & kits Make sure this fits by entering your model number. All Products are covered under the Spears Racing Return Policy. Engine Accents. Yamaha R3 2015-2018 ** Yamaha R3 / MT-03 Critical Issues January 24, 2021 *** Top 5 Yamaha R3 / MT-03 Mods and Upgrades January 24, 2021; Annitori Quickshifter QS Pro installed and beta tested on Yamaha R3 June 24, 2015; Dyno tested: 520 vs. 415 chain and sprockets – Yamaha R3 February 14, 2016 Engine Rebuild Kits. ... We install these kits on a regular basis, it took a lot of different kits for us to find a big bore kit that actually holds up and is reliable. But I'm so happy I went with the R3. Camshafts. 2015 Yamaha YZF-R3: PH2 Review. Legal only for racing vehicles in closed course competitions which will never be driven on a public right of way. Exhaust.  15253 S Inheritance Way You’ve come to right place for the best selection of Yamaha Engine Rebuild Kit. Water Pumps. Engine Hardware. Radiators. Working from his carport and making house calls, Spears soon found a need for a total motorcycle repair facility. Yamaha R3 Bore Up Kit. This commitment has resulted in more forgings specific to certain applications, proprietary treated wrist pins and piston rings manufactured only for us. Spears Racing Piston Kits have been winning races and Championships all over the world for over 4 decades. It is built to be simple, reliable, and offer instant acceleration that is … ... Alternatively get a 126kg dry old school Aprilia RS125 and stock up on big bore 175cc kits for nigh on 40bhp … Yamaha YZFR-3 Overbore +2mm over. Blaster 1988-2006 240cc $450.00. × Dear valued customer, due to extended delays with OEM suppliers and the ongoing COVID-19 crisis, most parts are being placed on backorder status. Shop All Exhaust; ... Vortex V3 WSS Chain And Sprocket Kit Yamaha R3 2015-2021 $ 149. Yamaha R3 Superbike Upgrades. The 845cc Kit and Performance. There is no return on Electrical or Power Commanders. Big Bore Kits. In the summer of 2015 one of their Sponsors assembled a racing team called Emerald Roadracing, to run in the coveted race called “Isle Of Man TT.” With long hours and great dedication of rider and team they were able to finish 9th over all in the “lightweight/Supertwins” class on a Spears Racing powered Kawasaki ER650. All Products are covered under the Spears Racing Return Policy. Spears Racing continuous committed to excellence to advance as the industry changes. It was low on power and the engine wasn't as rev happy as the R3. Sparked by the hunger that only high performance and competition can bring, we created the AS1, AS3, DT1MX and the RT1MX—with a factory-installed power up kit dubbed the Genuine Yamaha Tuning (GYT) Kit—to propel racers to … NOTICE: This product is NOT legal for sale, installation, or use on a pollution-controlled vehicle in the state of California. Allowing users to easily change from 3 different maps for the high performance demands of Racing and includes. 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