I'd say there is "lot" of room for bigger valves?Interesting build. Someone put a lot of work into it. Given all that, I'd expect it to be likely to have a big valve conversion too. Have you checked for that?
Ken
This is what I run on my 920. Best thing since squeezy ketchup bottles...Can you share ideas how to do it properly on Commando engine? I once tried in the middle of the sump on Triumph, thats where you can lock the crank, and it was a disaster. Blowing oil out.
This is the unit most guys are runningCan you share ideas how to do it properly on Commando engine? I once tried in the middle of the sump on Triumph, thats where you can lock the crank, and it was a disaster. Blowing oil out.
Now this is a solution that appeals to me! Costs money, but isn't this the reason, why I go to dull work every day and get the € to be able to cut cornersThis is what I run on my 920. Best thing since squeezy ketchup bottles...
Reed Breather Kit
The Norton twin cylinder engine creates a serious amount of pressure in the crankcase as the motor spins. Over the years the factory attempted several methods to reduce this pressure – from a timed breather off the end of the cam on earlier motors, to a crude straight pipe from the timing chest onnycnorton.com
Sure is!Now this is a solution that appeals to me! Costs money, but isn't this the reason, why I go to dull work every day and get the € to be able to cut corners
I've seen Ducati reed valve welded straight on timing case on Triumph unit engine. Don't have first hand info how that works. Though in principal the best place to get the breathing out would be in the sump I guess...You can also use one of these on the crank case vent tube.
PCV Reed Valve - Crankcase Breather
Color/Finish: Silver Material: Metal Dimensions: Overall Length: 86.50mm Width (at widest point): 28.85mm Engine Inlet OD: 14.15mm Engine Inlet 11.85mm Filter (Air) Outlet OD: 12.00mm Filter (Air) Outlet ID: 9.45mm Fits: Universal Note: Easy Installation (Linked Below)www.mikesxs.net
I have had both and the Comstock design works better.
My thoughts too.Though in principal the best place to get the breathing out would be in the sump I guess...
CNW was the original vendor for the sump breather NYN sells.I've seen Ducati reed valve welded straight on timing case on Triumph unit engine. Don't have first hand info how that works. Though in principal the best place to get the breathing out would be in the sump I guess...
I think this solution is brilliant! I'm definitely going to have something similar.My breather is a modified sump plug with an aluminium adapter plate to allow the XS650 breather to be screwed onto the bottom.
There is a tube inserted to allow the air to be pulled from above the oil in the sump plug and as its for an MK2a with the internal ledge in the way the top part of the tube is flexible. This flexibility is not needed in most cases and if the cases are apart the ledge can be cutaway and a fixed tube used.
CNW was the original vendor for the sump breather NYN sells.
Apologies. I must have been muddling up two separate pieces and comments from Jim in my mind.Not correct: CNW always sold the excellent breather that bolts onto the back of the cases (also initially designed by Comstock).
The thread-in sump breather was designed and first sold in limited quantities by Jim Comstock, then licensed to NYC Norton exclusively.
But back to the OP's initial post - this is a badass motor. Maybe not for everyone, but whoever did this up knew what they were doing. Not a lash up job.
-Kenny
That is from Mikes XS in the US, do you know if they are available here in Europe?My breather is a modified sump plug with an aluminium adapter plate to allow the XS650 breather to be screwed onto the bottom.
There is a tube inserted to allow the air to be pulled from above the oil in the sump plug and as its for an MK2a with the internal ledge in the way the top part of the tube is flexible. This flexibility is not needed in most cases and if the cases are apart the ledge can be cutaway and a fixed tube used.
Yes...That is from Mikes XS in the US, do you know if they are available here in Europe?
Go to ebay, then search in Motorcycle parts for 'EGR valve'That is from Mikes XS in the US, do you know if they are available here in Europe?
I'd say there is "lot" of room for bigger valves?