will it fit

[kyle]

will an 86 250 sx engine bolt into a 85 big red? will everthing work properly like exhaust and carb and airboots and shaft drive and all that stuff thanks
kyle

[dads]

If it's a 85-250 bigred it will

[christian]

yep, dads right. i recently sold a 250 big red engine but before it was sold, i had my 250sx engine out and put them side by side. although i already knew they would swap, i was bored and did it anyways just to see if there were any differences at all and didnt find any. did you get an 86 250sx engine or are ya looking at one to buy? john.

[kyle]

i am looking to buy one off ebay
i think it is yours christian.
i blew up my big red 250 bad.
everythingneeds to be replaced up top.
kyle