Rear Sub Frame - Thread Size

alan_db · 06-Jan-2006, 11:11

Anyone know the correct thread size of the bolts which thread the pillion grab rails into the boss on the rear sub-frame.

I am just rebuilding bike (with Sparkins lovely single seat unit) and the tapped holes in the rear sub-frame are a bit furry and full of crap. Need to re-tap the threads to allow me to put in a support rail (threaded bar with foam pads) in place of the grab rails.

Ta

Alan...

Jools · 06-Jan-2006, 11:34

I would go out into the garage to measure them up on my Strada, the trouble is that my 888 is garaged at Fordie's place which is about 15 miles from where I live....

I'm sure somebody who knows what they're talking about will be along in a minute.

nelly · 06-Jan-2006, 12:19

I think they are M8?

Have a look at the bolt that goes in there. If it's a cap head, a 5mm key means M6 thread, 6mm key means M8.
If it's a hex head, 10mm means M6 and a 12mm or 13mm means M8.

alan_db · 06-Jan-2006, 12:58

Cheers guys,

Its definetely hex head bolts so shall check tonight once I'm home.

Alan...

aka.eric · 06-Jan-2006, 13:33

M8X1.25 on mine,but having put the foam/threaded bar in,the seat unit was way above.So all I needed was to cover the back rail.All these aftermarket seats vary,but just a thought.

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06-Jan-2006, 11:34	#2
Jools DSC Club Member BSB Star Posts: 6,930 Join Date: Jul 2002 Location: Bedfordshire Mood: MT Meglomaniac I would go out into the garage to measure them up on my Strada, the trouble is that my 888 is garaged at Fordie's place which is about 15 miles from where I live.... I'm sure somebody who knows what they're talking about will be along in a minute. Reply

06-Jan-2006, 12:19	#3
nelly Registered Forum User Ducati Corse Posts: 3,134 Join Date: Jan 2002 Location: notts Mood: Bloo and Yellow.. and Red now ;) I think they are M8? Have a look at the bolt that goes in there. If it's a cap head, a 5mm key means M6 thread, 6mm key means M8. If it's a hex head, 10mm means M6 and a 12mm or 13mm means M8. Reply

06-Jan-2006, 12:58	#4
alan_db Registered Forum User Bevel Head Posts: 82 Join Date: May 2005 Location: Aberdeen Cheers guys, Its definetely hex head bolts so shall check tonight once I'm home. Alan... Reply

06-Jan-2006, 13:33	#5
aka.eric Registered Forum User 500SD Posts: 651 Join Date: Jul 2004 M8X1.25 on mine,but having put the foam/threaded bar in,the seat unit was way above.So all I needed was to cover the back rail.All these aftermarket seats vary,but just a thought. Reply