1) Check the coolant and see if a) level is down substantially, or b) coolant is fouled with oil.
2) Check the oil to see if the oil is fouled with coolant.
3) Then probably conduct a leak-down test to see whats going on with compression.
Broken oil rings could cause part of that, but I've never heard of a KLR burning through that much oil -and still running.
Glad you were able to limp home.
Using stock parts, a DIY re-ring job is about $150 worth of materials (rings, head/base gasket, fluids) and two hours time if you have a hone and the tools.
Worst case, get the 685 EM kit and never worry about oil usage again for 60k or more miles.
Last edited by foo; 08-29-2019 at 05:00 PM.