i'm new to this forum figured i'd add my 2 cents and see what everyone thinks of the build i have going on now. it started out with a crf70 bottom end and put the 2 bros stage 3 124cc dohc kit to it. i put a tokyo mods ignition lightly ported it put a bbr custom dohc pipe on it and different intake valves at first.
http://i50.photobucket.com/albums/f3...n07/Image1.jpg here is the last dyno it pulled at rear wheel.
As everyone knows rkfinch has some bad ass motors with high hp and torque. after talking to him and fatcat got the wheels spinning to up the displacement and see what it will pull. ok now to what i'm doing. i sourced a place threw fatcat for a 57mm bore cylinder which i now have the cases bored and thats ready.
http://i50.photobucket.com/albums/f3...ics/case-2.jpg http://i50.photobucket.com/albums/f3...cylinder-1.jpg i am also going to take my takegawa crank and stroke it to 57mm which should put me in the neighborhod of about 145 146cc. my goal is to put bigger valves in it which already taken care of. it started off with two 21mm intake valves and two 18mm exhaust. it now has 21.8-21.9 intakes and 19mm exhaust. i am also throwing the idea of getting a custom set of cams done for it also. here are some pics of what i have going on so far
pic of new intake valves sorry haven't gotten around to take pics of the new exhaust valves
http://i50.photobucket.com/albums/f3...lvesinhead.jpg
stock piston from the top
http://i50.photobucket.com/albums/f3...tontopview.jpg
stock piston from the side
http://i50.photobucket.com/albums/f3...onsideview.jpg
couple pics of new valves vs stock vales
http://i50.photobucket.com/albums/f3...debyeside2.jpg http://i50.photobucket.com/albums/f3...idebyside1.jpg http://i50.photobucket.com/albums/f3...07/bottoms.jpg
thats all i have for now. my only 2 hold ups are crank and piston. i might have my piston problem figured out. my 2 options where have a custom piston made which rould run me around 700 usd or custom make one which i opted for the later than the 700. so i have a piston on the way and i should get it next week. as far as cranks goes thats not going out as planed. the stroker pin i had picked out for it they no longer make it. so i'm throwing some ideas around with that if nothing else i know where i can find a 56mm crank for it just really wanted to go with the 57mm stroke. when i get something else done i'll post it up and when its all back together i plan on getting it dynoed again and seeing what it has.
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