I’ve got a 98 WR400F
Somewhat of a newbie here. Quick question – I’ve got a 98 WR400F that I’ve nursed along for a while now. The compression has been fading and an exhaust valve will occasionally stick. Yesterday’s ride presented me with light gray smoke upon start up which cleared up after warm up but didn’t completely disappear. Could the smoke be a symptom of the valves needing shimmed? I’m not too keen on a top end rebuild considering what the bike is probably worth however, i need this thing in running condition when i sell it in about 6 months.