Motorcycle Repair: tachometer problem, strange happend, long periods

Question
hi,

I recently washed my cycle like i normally do. This time something strange happend when i started the bike, i notice when i took it for a spin that the tecometer went nuts, it bounce from 0 to 8k rpm then it show your actual rev and so on. even when the igintion key is set to on with the engine off the tech just keeps going from 0 to 8k. im hoping that this had nothing to do with water or etc. how do i diagnost this problem? your help will be highly appreciated.

my bike is a 2001 Yamaha YZF600R.

thank you,

steve

Answer
Hi Steve.
 Actually, this is a common problem with the electronic tachs on every make that has them.  It means that a small amount of water has gotten into either the guage or the pickup.  It should correct itself.  You may also notice this problem if you have been caught out in a particularly bad rainstorm or if you leave it out in the weather for long periods.

Have fun.
FALCON