Topic: Stripped Cylinder Head thread.(from exhaust)

[mannixdk]

When re-attaching the an exhaust retaining rings on my 76 cb400 4, I managed to stip the threads in the cylinder head. Would anyone know what the best course of action would be? I've only had the bike a week and I would like to try keep the repairs on the budget end of things. I've seen helicoils are excellent repair tools but I never used them myself and would hate to cause even more damage. Any advice would be much appreciated.
cheers
mannix

[cben750f0]

mate if you buy  a kit, they have instructions, they are really easy to use, and it really doesnt take that long to do... have confidence in yourself.. ..peace

[cb750_chris]

Heli coils are as easy to instal as a light bulb.  Ok a little more involved than that. 

If your exhaust bolts are M8X1.25 get the kit # 770-3093 from NAPA and a nice 21/64 drill bit as well. 

As long as you get the hole straight you are in buisiness.  I saved my sandcast head with one.  I ran one helicoil in, snapped the tab and ran another one in behind it.  Cut off the excess and it made for an invisible repair. 

Chris. 

[oldbiker]

providing you can get at it it will be quite safe to do it with the head still in place.

[Uncle Ernie]

put grease or vaseline in there so any pieces, nits, or doo-doo don't get inside.