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  1. YFZ Powertrain
    Just thinking about what benefits I would get from a stoker crank in a 06 engine. Now I don't want to go over a 12.5:1 compression ratio and want to stay on 93 pump gas. It would be paired with a JSR tall 98mm cylinder to keep compression down. Would I have a better rod rotating angle for the...
    big bore jsr pump gas stroker
  2. YFZ450 & YFZ450R General Talk
    What are the pros and cons of running a stoker kit? I'm looking at a 502 98mm with a +5mm stroke. Will it effect the quick rev speed of the motor?
    pros & cons pros and cons rev speed stroker stroker kit
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