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Thread: Yamaha R1 Engine

  1. #1

    Yamaha R1 Engine

    Can anyone help with a 5jj r1 engine question, my son bless him has bought a mnr vortex with a r1 fitted the 1st engine lasted 80 miles before if failed, a replacement 5jj has been fitted sounds ok performs well but does breathe vapor from the gearbox breather, all it has is a small filter fitted vented to atmosphere is this a common thing with a motorbike engine.



  2. #2
    Spanner Monkey

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    Re: Yamaha R1 Engine

    normally go into the bottom of the airbox

  3. #3
    Mechanic kierzo-199's Avatar

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    Re: Yamaha R1 Engine

    they do breathe a fair bit mate hope this helps

  4. #4

    Re: Yamaha R1 Engine

    Quote Originally Posted by kierzo-199 View Post
    they do breathe a fair bit mate hope this helps
    Thanks for the reply there is a thread here to whats going on with the vortx http://www.locostbuilders.co.uk/foru...php?tid=181937

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