I recently inherited an '87 LT250R from my father, but theres a problem. 10 years or so ago we were in Glamis and my dad was riding the 250. I was very young at the time and was constantly getting stuck on my little 80. My dad spent more time off his bike digging me out than he did riding around. The last time he got off and left the bike at an idle it stalled. When I try to kick start it, it wont budge. I understand that it is seized, however I am looking for a more experienced opinion on what exactly is wrong before I start tearing it apart. Could it be that its just the rings or a more serious problem? I am an active duty Marine and am dedicated to fixing this bike in my off time. I just ordered my Clymer repair manual and I will do whatever it takes to fix it, I would just like to know a little more about what I'm getting into before I start. Any help is greatly appreciated. Thank you and Semper Fi!

Welcome to the forum Man,,,
 
Best place to start is with pulling the engine out the bike and pulling down the top end to see whats going on. Did it seize on that day or has it seized just from sitting over the 10 years?

Tear it down and check the top end all new bearings and seals and orings. Use oem parts from Suzuki
Also a bolt might came out and got into gear and lock the motor up. But on full rebuild use billet  thrust washers and the rm wrist pin bearing. Just give it a full rebuild if money isnt a issue

it may have had a lean idle and locked up, do a top end
use a weisco piston and the  other parts that were talked about on here. good luck
who knows maybe a hone or a bore and you will be riding

check rubber boot that holds carb on real good, when you take it off flex it all around looking for cracks.
any crack will let air in and run your bike lean.

so cometic gaskets
billet washers for the piston, sold here
weisco piston
there is a member on here thaqt can get you discount oem parts for your bike

Heres a list of parts I plan on getting. If you have any other suggestions please let me know!
Top end rebuild kit
Weisco piston kit
Piston sleeve?
Bearings and Bushings
Carb rebuild kit
Spark Plug
Air Filter
All new fluids

Depending on what size the bore is now and how bad its scored you may be able to have the cylinder bored instead of resleeved.Make sure you ad the aluminum thrust washers and RM pin bearing to your list.Stupid question but you wouldn,t have happened to run the quad out of gas or very low.I,m no expert but the specking on the top of the piston suggests you were really lean and some detonation issues.Tthe rings obviously look nasty as well.Like I said I,m no expert so maybe one of the builders will chime in.

lets see the head, you will have to have it cleaned up if there are any imperfections in it.
check pipe for piston skirt parts, it may have blew some of them into the pipe,