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About RDey

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  1. RDey

    WR to YZ conversion help.

    I have an 06 wr450f so I hope this is relevent but I just changed the springs front and back and my bike feels like a totally different bike. It felt like a fat lazy cow that sagged under it's own weight. My weight is 180 lbs. and the stock fork springs are .46 and the shock is a 5.3. I went to .47 kayaba fork springs and a kayaba 5.5 shock spring. When I went to Race Tech's spring calculator I disagreed with their calculation. Race Tech claims I am the perfect rider weight for the stock suspension...but...they don't take into account the 25-30lbs of extra bike weight. An 05 YZF450 has the same springs as my 06 WR450F. Take 30lbs off of a YZF and the stock springs feel much stiffer plus the valving is totally different and stiffer as well. I decided to follow the manuel and they say the stiffer springs are for a 176 lb rider. If you do use the RT calculator add 30lbs to your rider weight and see what it says or follow the manuel. I hope this helps.
  2. Thanks for the reply. I think I may contact FMF to see if it's within their tolerances on this specific bike. I contacted a local Yamaha dealer about my concerns and they said, assuming I installed the pipe correctly, there shouldn't be a problem. That just made me wonder if I mounted it wrong. Oh well...It's nice to know at least one other person had a similar issue. I'm assuming yours is the Titatium Powercore as well? The weight difference from the stock pipe was worth the price of admission.
  3. I just installed a Ti Powercore on my 06 WR450 and there is only about .080- .100 of clearance between the midpipe and the bottom of the shock canister. Should I be worried about the heat displacing itself to the nitrogen charged canister? The stock pipe has a different bend to allow more clearance. It appears to me there is only one way to mount and make all the holes line up but it leaves a minimal amount of clearance between the two. Was anyone else concerned about this?