Leaking mixture screw

Big Daft Lad · 16-08-2018, 08:30 PM

I've been recommissioning my 96 M600 after sitting in the shed for 8 years. I've cleaned the carbs out and got it running sweetly but there appears to be a leak from one of the mixture screws. Any ideas what could cause this?

Luddite · 16-08-2018, 08:44 PM

Do you mean the screw at 14 on the attached diagram?

If so, there's a small o-ring (no. 11), which could well have perished after eight years so maybe that needs replacing?

Big Daft Lad · 16-08-2018, 08:51 PM

Perfect, I don't remember seeing that o ring so maybe it's gone! I'll order a new pair.

Exciting to hear it running again after so long!

Nickj · 16-08-2018, 09:37 PM

Quote:

Originally Posted by Big Daft Lad

Perfect, I don't remember seeing that o ring so maybe it's gone! I'll order a new pair.

Make sure that's it a synthetic material and ethanol resistant or it'll just melt away

Flip · 16-08-2018, 09:47 PM

Quote:

Originally Posted by Nickj

Make sure that's it a synthetic material and ethanol resistant or it'll just melt away

Yep- should be able to get them in FKM (Viton) here:

https://www.polymax.co.uk/o-rings/rubber-viton-oring/

Luddite · 16-08-2018, 10:26 PM

Quote:

Originally Posted by Nickj

Make sure that's it a synthetic material and ethanol resistant or it'll just melt away

Looks like you'll need an OR-005 (the Ducati part no. is 13440151A).

Image taken from here:

https://www.litetek.co/Carb_Kit_Ducati.html

But you might want to think about replacing all the seals/gaskets with viton alternatives and also the float valve with a viton-tipped item, see here:

http://www.nrp-carbs.co.uk/shop/inde...roduct_id=2718

Big Daft Lad · 17-08-2018, 12:06 PM

Thanks very much. I love this site!

16-08-2018, 08:30 PM	#1
Big Daft Lad Registered User Join Date: Mar 2007 Location: Gordon Bike: M600 Posts: 95	Leaking mixture screw I've been recommissioning my 96 M600 after sitting in the shed for 8 years. I've cleaned the carbs out and got it running sweetly but there appears to be a leak from one of the mixture screws. Any ideas what could cause this?

16-08-2018, 08:44 PM	#2
Luddite Registered User Join Date: Aug 2011 Location: Southampton Bike: M1100evo Posts: 2,465	Do you mean the screw at 14 on the attached diagram? If so, there's a small o-ring (no. 11), which could well have perished after eight years so maybe that needs replacing?

16-08-2018, 08:51 PM	#3
Big Daft Lad Registered User Join Date: Mar 2007 Location: Gordon Bike: M600 Posts: 95	Perfect, I don't remember seeing that o ring so maybe it's gone! I'll order a new pair. Exciting to hear it running again after so long!

17-08-2018, 12:06 PM	#7
Big Daft Lad Registered User Join Date: Mar 2007 Location: Gordon Bike: M600 Posts: 95	Thanks very much. I love this site!