Yamaha's amazing reliability!

21 replies to this topic
  • 642MX

Posted November 22, 2005 - 07:38 PM


Actually the one intake valve that had been out of spec the most was OK this time but my mechanic said the other two were right on the border so I had him adjust them. If they're all within spec now and I'm not at the last possible shim allowed, do you think they'll be OK for a time or am I courting disaster?

You need new valves now, don't forget to replace the valve seals and springs too.

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  • 642MX

Posted November 22, 2005 - 07:41 PM


Oh I see, where I ride its always raining, or on gravel logging roads, but I think i might just want to get a new filter, don't wont to worry about my valves.

Buy a UNI, they are a 2 piece filter that is easy to clean. UNI's are the only filter I've seen dyno .5 horsepower more than a stock filter (half a horse is a bunch).

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