Exhaust manifold stud measurements? '80 650

Hey everyone. Does anyone know the thread pitch, size, and length of the xj650 exhaust manifolds? One snapped off as soon as I started the bike this morning in the worst possible way... a quarter inch into the head.

Anyway I'm going to begin the process of replacing them all and since I have access to a wall full of hardware I might have the right stuff already if I knew what size to grab

Thank you!

 

the nut is M6 P(itch)1.0 torque spec is 7.2 ft.lbs. Thats just half of your question answered


part number from yamaha parts nation or at dealership
Bolt, Stud $1.95 each
old number 95611-06630-00 new number 90116-06466-00

if you measure from head to end of stud you will get with in the ball park

 

40.11 mm total length ~15.6 mm thread outside 14.9 mm unthreaded and 10.6mm into the head thread . just pulled one out of a spare head


M6 P 1.0

 

Sounds as if you need a Haynes manual. Widely available here and on the internet.

 

haynes may tell him the size and pitch on the exhaust nut for torquing but i do not think it lists the stud size and length. its not like yamaha releases that kind of info because they want to sell you parts.
I do agree he does need manuals FSM and Haynes would be good.

 

Here she is! I have a Haynes manual, didn't list what I needed. I am an XJ noobie but a long term gear head. Bought the XJ now that the kids are a little older and have been enjoying my little project bike. I've already replaced the clutch and bought the carb kit, I'm waiting for new intake manifolds before the rebuild though.

Thank you XJ550H!

 

there is a thread for posting your photo , not that i am saying you can not post it here.

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