engine stud

[MikeM]

6mm helicoil tap that came with kit

put a bid of threadlock round helicoil and put it back in

does not look promising the tap just slides in now cant cut it any more .... gutted

 tried to put exhaust back on and nope just pulls out helicoil stretches it

so need another plan...... the walls of the head are not cut, almost like the tap has just made it smooth and not actually cut a thread,   

[Bitsa (Ralph Wright - RIP)]

Mike
No big deal do as Trig says find a good ali welder and re drill it to size lucky for me I have a good english ali welder here and has done a couple of jobs for me with great results
Cheers
Bitsa

[MikeM]

  couldn't find an ali welder round here for last job.... had to come up with different plan last time

gutted about this was looking forward to starting bike tomorrow

[ka-ja]

Hi,
    how much "meat" around the stud hole? not familiar with your motor, just wondering if it is possible to tap out 8mm., then use an 8mm/6mm double diameter stud, even 7mm taps are available, seems a same to waste an otherwise decent head, are you near humberside?---ken

[Bitsa (Ralph Wright - RIP)]

Ka Ja
Just emailed Mike with more or less the same solution we all know when this happens it knocks the crap out of you.
Cheers
Bitsa

[ka-ja]

hi,
    If he was near, I could maybe have helped, yes, it is gut-wrenching,been there!----ken

     This one got to me, seized in gallery plug, and asoda blasted engine to clean!

                       

                     

[Trigger]

Mike there must be someone in your town that has a Tig wielder. If you put the stud in and then tack around it to make sure it is true, then tig it in.

[MikeM]

put up an ad on local motorcycle club so will see what comes from that first





at least I know some options now

[Bitsa (Ralph Wright - RIP)]

Mike
From the pics definatly fixable chin up mate
Cheers
Bitsa

[paul G]

I would go the 8mm to 6mm stud rout, loads on eBay.

[ka-ja]

Hi,
    Enough metal there to carefully tap out 8mm-good luck----ken

[matthewmosse]

I have a cb500 engine where someone has done a few out to at least m8 and it looked like an attempt at m10 had been made, though that is a bit silly and I'll be fixing it with welding. For yours, re tapping to m8 would seem best.

[MikeM]

any links to the m8 to m6 exhaust studs

can find m8 to m10

[MikeM]

well after trying countless engineering firms not one local firm wants to take it on

so storage for bike until I can find an answer 

[matthewmosse]

I'm surprised at that, ok it is a bit of a pain of a job, but it isn't un surmountable - want me to chat with my mate who runs a bike shop? he might be able to sort the head out if you sent it down here.