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RD 350 YPVS (1983-1984) XJ 400 Seca II (1993) FJ 600 (1984-1985) XJ 600 (1984-1991) FZR 600 (1989-1999) YZF 600 R Thunder Cat (1996-2003) YZF 600 R (1997-2007) FZ 700 Genesis (1987) FZX 700 Fazer (1986-1987) FZ 750 (1985-1991) ...
YPVS power valve system features a total of three slides (one main and two auxiliary slides) which provides the benefits of both solid, low rpm power delivery and a strong top-end punch. The YPVS system varies the exhaust port height and timing based on engine rpm. 2017 Yamaha YZ250www.T...