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    • #4382
      Stephen gleason

      I have had a chance to use a Dyno
      To test my cr250 based engine after getting a good baseline. I put carb (38mm mikuni )on flow bench got a baseline. Then taper bored and worked the bell area. To a 20% increase .
      Re installed on engine and. Reran the pulls. And the graph layed right over the first runs
      So next I put a 44mm on just to see. And it did same!!!
      Now I’m confused (I have V force reeds). Is that the limit of motor or is there a restriction I need to be looking for? Any ideas
      Thanks in advance

    • #4403
      Chris Reinhardt

      Sounds like you hit the wall with something, porting, ignition timing, compression, pipe. Pick one, change it, repeat. That’s basically how you dyno test/Tune….

      Either that, or the testing procedure/test cell is not consistent….


      Chris Reinhardt

      CR2 Motorsports


      XV Racing Products



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