Monty disc bolts

[Fitz]

Hello all, I have just been trying to get my spare wheels ready to have new race tyres fitted for mid season

I checked the parts manual and rather than using the locking plates on the front discs, I decided to use SS bolts drilled for lockwiring, not absolutely necessary but if it makes me feel more confident - it gets done

Checked the manual and it says 8mm x 25mm so thats what I ordered - why would I think that they would fit

I have just a tap down to clean the threads up - 8mm no chance, 7mm x 1mm pitch works fine

Does anyone have a set on the bench they could measure for me, I cant take my bike apart this week just for that, i am racing at weekend at Mallory

 

[sfcpiet]

Should be M8, as on all Laverda cast and wire wheel hubs.  Sure the bores aren't clagged up with old locking compound?  Threads been reduced with inserts?

piet

 

[Fitz]

Thanks Piet, these are my spare wheels that i bought off Bob Dixon some time ago, i had them powder coated so they were dirty. I ran a 7mm x 1mm tap down them and seemed good
I tried one of the M8 x 1.25mm bolts earlier and it flattened the threads, makes no sense to me, i may try an M8 tap tomorrow

 

[CLEMTOG]

you should have installed some bolts of any length in the threads before powder coating, and the aggressive sand blasting that should go with it,, I hope the mating faces for the discs and bearings have been masked as well, because if not you have another little task to get on with.
CLEM

 

[Laverda SF]

You don't a leaky Gas Cap or crack in the tank spilling on the battery under your set - BOOM!

 

[Grant]

WTF does that have to do with Monty disc bolts??????

 

[john christopher]

perhaps don't use stainless steel bolts, - nothing like as strong as  high tensile mild steel I'm told.
  John.

 

[Jeremy Wilton]

For what it's worth, two of those on mine stripped - one on each side, they need re-tapping...
JW

 

[Fitz]

Resolved this one now thanks to all

The bolts I ordered were correct at 8mm x 25mm and they are 1.25mm pitch so shiny bolts, new discs and lockwire all done

Cheers

 

[piranha-bro2]

Resolved this one now thanks to all

The bolts I ordered were correct at 8mm x 25mm and they are 1.25mm pitch so shiny bolts, new discs and lockwire all done

Cheers

Good work. of course if you want to spend some serious dough, Probolt Kit do nice Ti disc brake rotor bolts. A genuine reduction in unsprung weight when you factor in 12 (or 10 depending on model) bolts.