interesting, I was wondering what might happen here.
when I stripped out the threads for my oil sensor, my machinist told me that I was not going to be able to use a helicoil to fix it. He suggested using a kingsert or something similar with a solid construction.
were you told you can't use the helicoil because there's not enough metal, or because the oil fitting is a concern?
unfortunately, there wasn't enough metal to bore out for the size kingsert that I needed, so we just made our own adapter out of some bar aluminum stock...
I was told the thread wasn't deep enough for a helicoil - you need to go right through it, he said... It certainly looks like an ordinary thread tap wouldn't work as the taper is too long - you wouldn't be able to reach the whole way. Still, they do them somehow in the first place..... I'm told a replacement is about 35 pounds (about $65) but not available until January next year! Any DML sponsors stock Mikuni spares? I can't wait that long!
You're right Green! I got it done at a proper old fashioned engineering shop - the guy said he wasn't sure it would work but since it was f***ed anyway it was worth a try. He fitted a Helicoil and it cost 20 pounds (30 euros or $40) I'm just glad I don't have to wait until January for a replacement! ;D