4 years ago

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The Yamaha FZ1 is a fantastic bike, with a few potentially disastrous shortfalls. One of those is the Rotor unit that was built into the earlier models. This early rotor design has adhesive bonded magnets which through vibration, heat or plain bad luck, have the potential to come loose and cause a hand grenade like effect on the innards of the engine. 'Thankfully', Yamaha realised this error (though they never admitted that it was an error) and created an improved design in which the magnets were sheathed behind a metal wall, thus rendering them forever imprisoned and unable to destroy any more poor innocent engines!

In this video I will be preemptively swapping out my old rotor for the newer design so that I can stop having nightmares about my bike committing Harikari while I'm 6000ft up on a mountain pass!

AFAIK This fix is relevant for the FZ1 all years up to and including 2014, but there’s probably some overlap so the only way to be sure is to check!

It's also exactly the same rotor (and I assume same problem) with the FZ8 from 2010 onwards and the YZF-R1 from 2004 - 2008.

The old part number is: 5VY814500000
The NEW part number is: 2SH-81450-00-00

I have seen a few people advertising Rotors under the new part number, but actually selling the design with the exposed magnets. So watch out! If you can SEE the magnets, leave it WELL alone!!

That being said, apparently there is still a market for your old Rotor once you've completed the swap. But that's a moral dilemma for you to work out with your own conscience as to whether or not you feel happy selling a part that could very well destroy somebody else's bike!!

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