Exhaust rose nut threads.

[Timpo]

It's nearly time to cut the rose nuts off as my headers have corrosion on the crossover pipes and I guess a hole or two will soon appear.
So, as mentioned in a few threads, I will apply a couple of blows with a cold chisel to cut the rose nuts off.
I then plan to clean the threads up with a die nut, M52x2mm pitch.
The nuts have been moving easily with applying heat to them but I'm not wanting to ruin the head threads, so the chisel it is.
Motobins are sending me two new rose nuts at £11.40 each, a bargain. I wish the die nut was that cheap!

Timpo.

 

[Paul Rochdale]

Not needed at all. Drill a line of 1/16" holes between the fins of the nuts, whack with a sharp chisel, insert large screw driver and lever apart. The alloy is that soft. Clean up the threads with a wire brush and perhaps a Dremel with a rotary wire brush. Then if the new nuts won't spin on, get a hacksaw blade and grind the edge to a knife edge and use this to file what is left of the damaged threads. Wire brush again, apply Coppaslip then spin on the new nuts.

Every year undo the nuts, clean off the gunge then after applying new Coppaslip, spin the nuts back on.

Simple.