250r help someone PLEASE!

[x_doug_x]

i have a 250r with a lonestar swingarm person i got it from said it was a 86 i can't find serial numbers on it anywhere, i have took a wire brush to the powder coated frame where it says the serial numbers are and didn't find anything. i need a new piston and need to know if it's a 86 for sure, can anyone tell me how to tell if the motor itself is in fact a 86 motor? please help someone.

[zephyrdog]

i have a 250r with a lonestar swingarm person i got it from said it was a 86 i can't find serial numbers on it anywhere, i have took a wire brush to the powder coated frame where it says the serial numbers are and didn't find anything. i need a new piston and need to know if it's a 86 for sure, can anyone tell me how to tell if the motor itself is in fact a 86 motor? please help someone.

 

I think all the motors are the same from 86-89. Shouldnt matter what year it is, they only made them for 4 years.

[shawn941]

I think all the motors are the same from 86-89. Shouldnt matter what year it is, they only made them for 4 years.

x2

[sinisterboo]

WRONG!!! 86-87 has a short rod crank, and a different intake port configuration, 87-89 are longrod with a bridged intake port. Email me and I will answer any question you have. Also, the swingarms are same way, 86-87 has steel swingarm the has a motor mount in between the frame ends, and 88-89 had an aluminum one that was solid all the way across where the swingarm bolt goes thru. email sinisterboo@sbcglobal with any 250r questions....