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[QUOTE="greenmonkey, post: 821857, member: 55567"]
i used chainsaw motor to build a go cart a few years back, so i tached it.
it idled at around 2,500 rpm and the clutch didnt fully lock until almost 3,500.
I estimate it probably ran, during use, at about 4,500+ rpm
now it may not run as fast but as far as loads go, household 2-strokes "other than mowers" often carry more load than your dirtbike, in comparesion to size.  How often have you got in a situation where your wheel just didnt have the power to spin? Never, unless you try to take off in 6th gear right?  It happens all the time with weedeaters, chainsaws and most of all, mopeds ...
   I dont want to go overboard or off subject with the "chainsaw-weedeater" discussion it just a way of demonstrating how durable 2-stroke motors can be...
   I belive it is the rpm not the load that wears the motors down so fast, bringing in the "built for performance topic"
I cant find any charts.etc on the rpm/power ratio of these newer 2-stroke motors. when does the powerband kick in?
   Any way a better question is do they still make 2-strokes for the trails, like all the older 2-strokes?  This is probably why they last much longer.  I doubt they rev much higer than 6,500-7,000 tops unless you dont now how to shift....
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