Ive always called the whole top end the head, but the main top part where the spark plug goes, it will bolt up to a blaster, i was just wondering if the whole cylinder would bolt to it, if so i was going to get the head shaved because im sure a yz250 has a longer crank
I couldnt tell ya, i bought 3 yz250 motors and a frame 2 years ago for 50 bucks, then gave it to my cousin, i got it all back the other day because im about to go trade it all for a blaster frame, but if the head will work on a blaster then im going to keep 1 head and go buy a blaster motor for 100 bucks
WEll, 1st, theres nothing you could do to a yz 250 head tha you can't do to a blaster head. The only benefit would be if it had more surface area on the cooling fins. I do remember somebody putting one of the old porcupine 250r air cooled aftermarket heads on a blaster in 88 or 89. this would provde somewhat better cooling, but I havent seen one of those heads in years. True the head is a major aspect of cooling, but the real culprit in an aircooled 2stroke motor is the thermal expansion of the cylinder.
ok.............looks like its 70mm bore x 64mm stroke......so in a stock blaster motor it'll be about 220cc's. i wonder what the port timing would look like......i'm intrigued because it'd be an interesting project
yeah i looked around a little bit and the ports are HUGE. it'd be really interesting to see how one would run on a blaster bottome end...but i'd probably just swap in the whole engine if i had it available
ok.............looks like its 70mm bore x 64mm stroke......so in a stock blaster motor it'll be about 220cc's. i wonder what the port timing would look like......i'm intrigued because it'd be an interesting project
Well, your definitly not going to get a +7mm stroke blaster crank, then there is rod location on the piston, so your going to be cutting the cylinder down and maybe using a different rod plus a 4mm crank, then trying to get the porting right, then having a pipe made... you can do a lot to a blaster motor for the dollars its going to take to get that figured out.