Originally posted by Tunamike
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Just a side note, the engine balancer has been updated from Yamaha to a type 4.
If you don't have a type 4, I'd strongly suggest you replace it. Earlier models have failed spewing "teeth" thru out the engine.
Back in 2012, Yamaha replaced mine with a type 3(under warranty). It's since been updated to the type 4. Any kind of "whine" you can hear from it (like a super-charger) is NOT good.
You can do it yourself in 1-1.5 hours taking your time..
My old type 3:

Block ready for the new one:






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