modded 300ex power

[ethanp87]

i have a powroll 313 kit and stage 2 web cam 10:5.1 compression. what kind of power do you guys think it is putting out?

[2muchquad]

well a lot of that would depend on your engines current state of tune.fresh top end,valves in good shape holding compression.your jetting in the ballpark?on paper i would imagine it should be close to 23hp or so.a lot of people dont realize that building a engine is a science of using parts that complement each other.im not going to go into detail but a cam,exhaust and big bore doesnt mean your going to have the ultimate efficiency on your power stroke.everything has to work in unison.a big cam with too big of a carb and the wrong exhaust(such as headpipe length etc.)isnt gonna run as well as one would like.get the idea?this is why i do all my own motor work exclusively(except cylinder sleeve installation).theres so much garbage out there on the aftermarket its sickening.ever notice how the so called "slip ons"are almost the same size?a exhaust for the 300 is the same size as for the 450,wtf is that.use the same size exhaust and just a different midpipe among the brands,thats crazy.theres a lot of r&d there.NOT im more of a 2 stroke specialist but i have been playing around with 4 strokes the past few years.i try and learn something new whenever i can,i am by no means a mr know it all,but i can do better than half of these "here today gone tommorrow racing"companies,sorry so long,i had to vent:D