Triumph Adventurer 900 goes bang and stalls when put in gear!

Rings, head or valve is the problem. Going to have to tear the motor apart.

Does it yerk forward, if it does that it could mean that the clutch is not set correctly or it it does not release correctly

http://www.kbb.com/motorcycles/

enter your zip etc

If its only happening when moving and your feeling vibrations in your feet. Check your chain is not to tight. You could also have worn chain and sprockets. If not that then check rear wheel bearings and rear brake pads for heavy ware.

Does it go away when riding if you pull the clutch in? If so, it is the throwout bearing on the clutch.

Have you tried swaping the indicator wires around plug the left into the right this will eliminate the indicators themselfs if the problem moves to the other side the relay would be at fault assuming you have checked the bullb wattage

FRONT CHAIN SPROCKET

Most oils are preferential, but don't use car or low friction special oils in your bike, and beware of detergent oils if you don't know the service history, they will break down in a bike and can dislodge accumulated crud. To be safe10/40- 20/50 Motorcycle oil for engine/ part synthetic if you like, but not a necessity sae 80s gearbox, Dot 4 clutch and prepacked branded long life coolant with integral lubricant for cooling.

Try, Check float needle valve, replace with rubber tipped.