That's COOL! Now you're making me want to buy a bike just to learn some
more... I love it when the DML helps me spend my money.
-- -Josh 2000 Dakota CC 3.9L""Jon N. Benignus"" <blkwidow1@primary.net> wrote in message news:000e01c2f8b3$77eefa60$f770c4ce@blackwidow... > > The EXUP is a butterfly in the collector pipe, controlled by the ECM, and > opens at high rpm, and restricts flow at lower rpm. Many people remove it, > and as a result, go slower. I don't think Yamaha would have used it if it > didn't produce torque gains at low rpm. It allows the use of a high flow > muffler, while still having the restriction needed at low rpm. > > Jon > STL MO >
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:09 EST