1982 Yamaha XJ 650 - Answered Questions & Fixed issues

One of those drain plugs MIGHT be your neutral indicator detent spring and ball. MAKE SURE its in neutral before removing either plug. The other one is the oil drain plug. Both will drain oil, but the neutral detent will not get all the oil out,

check with your local dealer

32psi / 220kpa in the front, and 36psi / 250kpa in the rear.

:)

Sounds like classic fuel starvation. Clean carburetors, fuel lines and tanks. Fill with fresh fuel and attempt to start.

The starter relay should have no affect on power to other components http://www.polymetric.net/xj650_wiring_harness.pdf

bleeding brakes on bikes is a pain in the ssa they really are tesing of onse gumption, I had to take out bleed nipple once and fill the cals with a syringe, messy but can be effective, rears are worse in my opinion.

Yes this is evident in replacing engine oil to motorcycle engine.

Engine oil designed for automobiles isnt good for motorbikes as they offer additives for added "slipping". THis will cause your clutch to slip. Automobile Engine's oil system is separate from the clutch while motorcycle's clutch and engine fall under one oil system.

Use engine oil designed for motorcycles.
Solution: Buy and Engine flush, pour it to your crankshaft, run the engine for 5 minutes (idle) then drain. Replace with new motorcycle oil.
-levibit-

Won't start trying to start? It cranks no fire? No crank at all?

Check for fuel and spark at the plugs.

you didn't clean the carbs/fuel tank/fuel petcock/and fuel lines good enough

Hey Nick, unfortunately it could be several things. As Tom Diffin mentioned carb gummed up or even bad fuel from sitting all winter. If your positive the spark plug is firing (pull plug, connect to plug wire, place within a couple mm of a metal bolt, CAUTION: hold with insulated pliers so you don't get shocked, bump starter and watch for a spark) then try a very small squirt of fuel (starting fluid would be great) into the park plug hole and replace the plug. Try to start if the engine fires and then dies you have narrowed it down to carb, fuel or timing. FYI get a motorcycle repair or operators manual that describes how to winterize your bike for long storage (check library, you can read for free and make a photo copy of a page cheap). Keep us updated and good luck.

The only vacumn lines on a Maxim 650 is the small line from the fuel petcock that turns it on when there is intake suction. It can be connected to any intake manifold But is usually connected to cyl. # 2 left to right. The 4 vent hoses to the carb tops just hang down the back of the motor.

The "Starter Clutch" is on the end of the "Starter Motor" http://www.bikebandit.com/houseofmotorcycles/1982-yamaha-maxim-650-xj650j-starting-clutch/o/m147106sch225865