Z1OwnersClub GB

got the head on,exhaust,the very last bolt on the no 4 cam cap,snap!took the cap off,snapped down at the bottom,drilled a hole in it to try and get it out,it aint happening.helicoil?easy out?was wanting to fire it up but with 3 bolts in i guess thats being stoopid

To be honest, if you're just firing her up to check rest is OK, 3 out of 4 bolts won't hurt, but you need to fix it before going out for a ride
Has it broken dead flush or down inside a bit?

it broke down rite inside but after a call to my mate crawf whos a master of anything to do with metal its fixed,drilled it out and tapped it keeping the 6mm thread,so its 1 step closer to the road

Don't torque it up to what it says in the manual - should be about five and a half foot pounds not twelve. Twelve will break them.

Yeah, just nip the bastard & a drop of locktight

ye thats what i done this time,think the haynes manuels gettin a new home in the toilet when i run outa ass wipe!

It's wrong in the factory manual too, thet's probably where they copied it from. And it's still wrong in the 1000J/R factory manual.

The correct figure is calculated to be; 104 inch pounds which is equivalent to 8.666 rec. ft-lbs. 12 foot pounds will absolutely snap bolts or strip threads as well as overloading the caps. Need to use a low range torque wrench for this and preferably one with an external indicator. Looks like degrees but in inch pounds or foot pounds.
Al.

I ended up re threading every single 6mm hole in my J head, I used the Wurth Timesert kit, which although more expensive than helicoil, is far superior. Since then I've had no problems what so ever.