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  1. #1

    Join Date
    Mar 2015

    yamaha fx mr1 engine different cooling system comparison

    im putting this engine back together but im noticing that my mr1 engine doesnt have that presure valve thing coming off the block ..whats the difference does any one knows why mines just have those two hose that goes connected to the black plastic piece that has 3 hoses connected to it is like some type of t . and mines came with out that presure valve or w,e i s called ..why did they upgrade to that i think thats only for 07 fx mr1 ..anyone has info on this write back
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