get an RM 125 dirtbike engine.. those things spank almost any other 2 stroke..

 

ive seen the yz 250 in a blaster without too much modifying. but like the other guy said think about the mods you can do to a blaster first. the 240 kit and a 4 mm stroke will make it a 250. may not be as great as a yz 250 but for the money and the headaches , might be something to think about. with the mods i have i can beat 400s.good luck with your search. please post some pics if you do decide to swap. i always like to see custom quads

 

what issues did you run into with the 490 engine, I have one that a friend of mine wants to stick in his blaster and we thought it would be a sweet torque monster.

 

you can see it on youtube and there is a 81 yz 461? engine on ebay but its under blaster engines. its complete and ready to bolt in.

 

dirt bikes just seam to respond to none ballance shaft motors better than a quad and the stock 36hp or so motor for bolt-in pretty good power is the dt200 w/240 set up 3mm crank water cooled p.s. I know where ones at with a spair motor

http://s365.photobucket.com/albums/oo100/raptedtite/

 

ill buy your old blaster engine off you

 

sorry dude its all gone

 

<div class="FTQUOTE"><begin quote>Originally posted by: 1988fast250x

the Cr250 dirt bike engine is faster than the 250r engine in the fourwheeler...</end quote></div>

ONLY because the bike is lighter... You won't a mean blaster? Get a Tecate 4 engine with the powervalve setup... zoom zoom...

 

If your asking if it would fit and what not, you dont have the know how or resources to do it. It is very time consuming, and costly and you gotta know how to do a lot of welding and refabbing stuff. Just get the big bore 240 kit and you'll be good to go.

http://www.vitosperformance.co...tid=282&cat=248&page=1

 

ok i just started this and i got some questions i hope some one can help me. i have a 1992 blaster and im looking to do an engine swap what would be the best way to go when it comes 2 choosing the right engine to put in.