The YPVS answers both of these needs. Operation The YPVS employs a spiral shaped valve located on the top of the cylinder’s exhaust port. This valve is operated by means of a cable from a computerized mechanical control unit which detects the ignition frequency and.

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YPVS – Yamaha Power Valve System. The two-stroke power valve system is an improvement to a conventional two-stroke engine.

2016-06-07  · Sections of the mountain course on a modified YPVS 350. Sections of the mountain course on a modified YPVS 350. Skip navigation. Isle Of Man 2016 – yamaha ypvs 350 RD350 Agos Spawn. Loading.

Yamaha RD350 YPVS is a motorcycle that Yamaha made from 1983 to 1986. It was launched at the Cologne motorcycle show as "the nearest thing to a road.

2011-06-18  · A short video of the behaviour of the exhaust valves while driving. I always thought the valves opens fully at once and not gradually as in this video.

The mid eighties were a glorious time for two strokes with the yamaha rd500 ypvs and the Suzuki RG500 fighting it out for the top spot. Launched in 1986 the RG500 with its water cooled four.

Quite simply the most fun one can have on the street. Yamaha produced the RZ350 from 1983 to 1995. The last models sold in Brazil looking a lot like the FZR of their time. Integrated YPVS and loads of power in a lightweight package the RZ350 packed a serious punch against many of its bigger cc brothers.

The RZ 350LC had a variable exhaust port valve called the Yamaha Power Valve System (YPVS) that was controlled by a basic computer. The YPVS could open and close the valve to move the height of.

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YPVS-Yamaha Power valve system. ypvs yamaha engines, Yamaha Power Valve System: Yamaha engineers realized that by altering the height of the exhaust port they could effectively change the engine power delivery thereby having optimal power and torque across the entire rev range, so it was that the YPVS.

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Yamaha rd500 YPVS Uk bike matching numbers 3 owners low mileage more in stock. £24,000.00. Collection in person. Classified Ad. manufacturer: yamaha model: RD. Yamaha 350 RD Classic motorcycle, Classic Motorbike, £5,495.00. Collection in person. Classified Ad with Best Offer.