M900 exhaust Flange

pooh · 18-01-2021, 08:01 PM

Hi Folks
I don’t suppose anybody has an original exhaust flange they could take the measurements from so I can have two machined out of stainless. The ones I have are ally and have deformed so can’t get accurate measurements off them.

Thanks

Pooh

Albie · 18-01-2021, 08:42 PM

Quote:

Originally Posted by pooh

Hi Folks
I don’t suppose anybody has an original exhaust flange they could take the measurements from so I can have two machined out of stainless. The ones I have are ally and have deformed so can’t get accurate measurements off them.

Thanks

Pooh

Still available new from moto Rapido. Not expensive too.

slob · 18-01-2021, 09:21 PM

can't you just measure the pipe diameter and the spacing of the studs on the head?

Mr Gazza · 18-01-2021, 09:57 PM

I'll be having the exhaust off my M900ie very soon for a little buff up. I'll try and slip a flange off tomorrow and send you some dims.

Nasher · 19-01-2021, 07:23 AM

This is what I had made in Aluminium for my Carbie 900.
Unfortunately I can't find the CAD file at the moment.

Nasher.

slob · 19-01-2021, 07:37 AM

Do you have a note of the stud spacing? assume studs are M8 (9mm loose clearance)?

DOH! just the spacing, spotted R4.5

Nasher · 19-01-2021, 07:44 AM

Slob

I've only just noticed that the crucial dimension of the stud centres is missing.
But they are M8.

I had them made from the CAD file and my CNC guy sent me the above back when he had a couple of questions.

I'll have a look and see what I can find.

Nasher.

Nasher · 19-01-2021, 07:52 AM

Sorry, all the CAD files for this part are on my CAD software equipped desktop machine at work, and I'm working from home on a Laptop at the moment.

I should of course also add that the ones I had made work with the Separate half Collets.

Nasher.

slob · 19-01-2021, 08:06 AM

I knocked up a CAD model, just got to set the stud spacing and export .STL unless you get back to work first ;-)

I just measured the spacing on an M1100 engine model and I think it'll be 62mm

Nasher · 19-01-2021, 08:44 AM

Unfortunately, and I do mean this, it's going to be a while before I'm in work again.
I've dropped in briefly @ once per month since last March.

I work for a large American Aerospace company that has effectively banned us from site if we can work from home.
They are too scared that if they tell us to go in to work we'll sue them if we get ill.

Nasher.

slob · 19-01-2021, 08:54 AM

Look on the bright side mate, it's nice to have a secure job at the moment, an understanding (or worried about litigation) employer can only help ;-)

If someone can confirm 62mm I can upload the file...
(I've assumed/eyeballed the central slot size, which I'm guessing isn't a critical dimension)

I just happened to have a CAD package open when I saw your post

Nasher · 19-01-2021, 09:09 AM

This other view I've found appears to show the 9mm Stud holes just touching the 53mm Dia recess for the Split collets.

So the 53mm + 2x4.5mm to the stud centres would suggest 62mm stud centres.

Nasher.

slob · 19-01-2021, 09:37 AM

based on those measurements here's a .STEP file of my CAD model (without warranty of course)

http://www.thelasturl.net/ukmoc/M900...st_Flange.step

I set the central rebate at 6mm wide as that looked like your machinist's drawings, based on the 2mm depth.

Nasher · 19-01-2021, 10:40 AM

Cheers Slob

I Did offer at the time to have a batch made but nobody was interested.

I might get my CNC guy to quote them again.

Nasher.

slob · 19-01-2021, 11:49 AM

5 pairs (Al6082) where about twice the price of a single pair when I uploaded to a CNC service as a test (similar economy of scale to the clip-on spacer I modelled the other week)
Mind you, I only have a non-commercial license for the CAD ... but I'll happily make 3D models of parts club members want for free ;-)

18-01-2021, 08:01 PM	#1
pooh Lincolnshire Area Rep Join Date: Oct 2002 Location: Grimsby Bike: M900ie Posts: 469	M900 exhaust Flange Hi Folks I don’t suppose anybody has an original exhaust flange they could take the measurements from so I can have two machined out of stainless. The ones I have are ally and have deformed so can’t get accurate measurements off them. Thanks Pooh __________________ Slighty less brain cells than I was born with

18-01-2021, 09:57 PM	#4
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,806	I'll be having the exhaust off my M900ie very soon for a little buff up. I'll try and slip a flange off tomorrow and send you some dims. __________________

19-01-2021, 07:23 AM	#5
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	This is what I had made in Aluminium for my Carbie 900. Unfortunately I can't find the CAD file at the moment. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over.

19-01-2021, 07:37 AM	#6
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	Do you have a note of the stud spacing? assume studs are M8 (9mm loose clearance)? DOH! just the spacing, spotted R4.5 Last edited by slob; 19-01-2021 at 08:19 AM.. Reason: half blind!

19-01-2021, 07:44 AM	#7
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	Slob I've only just noticed that the crucial dimension of the stud centres is missing. But they are M8. I had them made from the CAD file and my CNC guy sent me the above back when he had a couple of questions. I'll have a look and see what I can find. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over. Last edited by Nasher; 19-01-2021 at 07:52 AM..

18-01-2021, 09:21 PM	#3
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	can't you just measure the pipe diameter and the spacing of the studs on the head?

19-01-2021, 07:52 AM	#8
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	Sorry, all the CAD files for this part are on my CAD software equipped desktop machine at work, and I'm working from home on a Laptop at the moment. I should of course also add that the ones I had made work with the Separate half Collets. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over.

19-01-2021, 08:06 AM	#9
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	I knocked up a CAD model, just got to set the stud spacing and export .STL unless you get back to work first ;-) I just measured the spacing on an M1100 engine model and I think it'll be 62mm Last edited by slob; 19-01-2021 at 08:27 AM.. Reason: CAD software open

19-01-2021, 08:44 AM	#10
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	Unfortunately, and I do mean this, it's going to be a while before I'm in work again. I've dropped in briefly @ once per month since last March. I work for a large American Aerospace company that has effectively banned us from site if we can work from home. They are too scared that if they tell us to go in to work we'll sue them if we get ill. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over. Last edited by Nasher; 19-01-2021 at 08:52 AM..

19-01-2021, 08:54 AM	#11
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	Look on the bright side mate, it's nice to have a secure job at the moment, an understanding (or worried about litigation) employer can only help ;-) If someone can confirm 62mm I can upload the file... (I've assumed/eyeballed the central slot size, which I'm guessing isn't a critical dimension) I just happened to have a CAD package open when I saw your post

19-01-2021, 09:09 AM	#12
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	This other view I've found appears to show the 9mm Stud holes just touching the 53mm Dia recess for the Split collets. So the 53mm + 2x4.5mm to the stud centres would suggest 62mm stud centres. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over.

19-01-2021, 09:37 AM	#13
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	based on those measurements here's a .STEP file of my CAD model (without warranty of course) http://www.thelasturl.net/ukmoc/M900...st_Flange.step I set the central rebate at 6mm wide as that looked like your machinist's drawings, based on the 2mm depth. Last edited by slob; 19-01-2021 at 09:40 AM..

19-01-2021, 10:40 AM	#14
Nasher Registered User Join Date: Jul 2014 Location: Portsmouth Bike: M900 Posts: 1,510	Cheers Slob I Did offer at the time to have a batch made but nobody was interested. I might get my CNC guy to quote them again. Nasher. __________________ Heaven doesn't want me, and Hell is afraid I'll take over.

19-01-2021, 11:49 AM	#15
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,710	5 pairs (Al6082) where about twice the price of a single pair when I uploaded to a CNC service as a test (similar economy of scale to the clip-on spacer I modelled the other week) Mind you, I only have a non-commercial license for the CAD ... but I'll happily make 3D models of parts club members want for free ;-) Last edited by slob; 19-01-2021 at 11:57 AM..