“WHICH PARTS FROM OTHER BIKES FIT THE 961”

BritTwit said:
Sorry to see that.
If the motor is blowing that much oil out, clearly there is too much lube collecting in the sump during the engine's operation.
The scavenge pump should prevent this.

Tony,
Is there any way to check the scavenge channel in the engine for blockages or a partial blockage?
I suppose the sump plate could be removed to check the gauze strainer for trapped debris.

“WHICH PARTS FROM OTHER BIKES FIT THE 961”
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My sump appears to have a smear of silver sealant so I'm assuming that when mine was retro fitted with the kit the sump gauze has been fitted and sump plate refitted with the sealant. I had a post a while ago with quite a bit of metal debris stuck to my magnetic sump plug (1000klm oil change) so quite possible given the clearance to the sump plate and gauze there is restriction from debris.

On all occasions that I have cracked the sump nut I'm sure that quite a bit of oil drains but have no experience other than wet sump engines so not sure whats an "acceptable" amount of oil dropping out the bottom.

Thanks for your interest
 
Lets find out how much oil you have in there. If you are wet sumping , then much more after its parked . Ollie must have copied the Norton kit stick , measure its length from the bottom of the cap threads to the end of the stick. There is a few threads on this already but I can measure mine. Also get the measurement where the knurl starts and ends. Lets just make sure your stick is like the kit stick.


Here is am image of the latest dip stick from our fellow member Voodoo :

 
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OK , No insult intended sorry for that . I am just trying to help this guy out. We know if the oil tank is over filled then more oil discharges to the air box. There is not enough volume in the oil tank for the breather will spill over or be pushed out with pressure back into the head . Then back into the sump which continually keeps the sump oil level TOO HIGH and then pushes the excess out to air box. Over and over again like a broken record I am. Measure your stick and compare it to the picture link.

I had oil to the air box as bad or worse than you Bluey ! I just got back from a long ride often running 75 MPH , 280 miles round trip , 13 ml ( that's right just 13 ml ) of oil in the catch bottle . So , in Norton small 1 oz (30 ml) bottle perspective just under half full . In the old days I would have 250 to 300 ml of discharge oil to deal with . ! Domi Air Box does not tolerate discharge oil , it can drip out of the air cleaner ( warning ) .

When we took the engine apart at Coote's we replaced the rings with new Norton rings. I really needed to have pistons matched to the barrel too . Or new Barrel /pistons /rings . But we were not prepared with the parts for that , So , Just a New set of rings went in. It took nearly 3,000 miles to fully bed those new rings in . For now I am happy enough. In review the steps :

1 . The wet sumping must be stopped entirely .
2. The correct oil level on the new longer knurled stick , don't exceed the knurl area.
3. The excessive blow by must be corrected rings, pistons , barrels etc.

We really should re-direct this back to the oil in air box threads .
 
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Bluey your not the only one suffering from Oil In the Air box . I bet there a lot of them out there but keeping quiet. Some owners would be disappointed with 13 ml in 280 miles too , I can't blame them. I wish all of us would have gotten a good matched set of barrels/pistons/rings the first time . If you keep the oil level half way down the knurl it seems to work best for oil in air box.
 
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TonyA said:
Bluey your not the only one suffering from Oil In the Air box . I bet there a lot of them out there but keeping quiet. Some owners would be disappointed with 13 ml in 280 miles too , I can't blame them. I wish all of us would have gotten a good matched set of barrels/pistons/rings the first time . If you keep the oil level half way down the knurl it seems to work best for oil in air box.
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I agree.
I have the the newer, longer dipstick., and I make certain to keep my oil level just below half way up the knurling.
No oil in my catch bottle, oil level remains constant.
 
My oils at the lower to middle never above of the "Long" dip stick Ollie so carefully crafted for me.

As I have literally just run this in getting the barrels honed and pistons re matched seem's nutts but if that is it then that's what must be done (wont happen until I can get gaskets though so who's knows)..... I will drop the oil out the sump to measure it, go for a ride and repeat to see what has accumulated. Will also then drop the oil after waiting a week to see if the oils seeping down over time.

If it weren't for the full throttle overrun pop she makes changing up the gears she'd be taken out the paddock and shot !!
 
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TonyA said:
When we took the engine apart at Coote's we replaced the rings with new Norton rings. I really needed to have pistons matched to the barrel too . Or new Barrel /pistons /rings . But we were not prepared with the parts for that , So , Just a New set of rings went in. It took nearly 3,000 miles to fully bed those new rings in . For now I am happy enough. In review the steps :
Click to expand...

Tony,

I think the Factory had several issues with the piston ring on some machines.

I picked up my 2013 CR in December 2013 from my dealer. It smoked like crazy when started, and was really difficult to get started. Once warmed up the smoking stopped. I got a call from my dealer about 2 weeks later, he said he was sending a van to pickup my bike. He said that Norton informed him that my bike had incorrect parts installed, and that they would send a "repair" kit to the dealer to resolve the issue.

The dealer had to pull the head and barrels off, and check the bores.
I spoke to the mechanic about this when I picked the bike up and he told me some story:

1. The bores were fine, but the rings were too small and had too large of an end gap. The replacement rings were right on.
2. The "repair" kits also included new valve springs, and valve seals, collars. The originals were apparently the wrong spec and there was a threat of the springs binding.
3. There was no shop manual yet for the 961, so the "repair" was performed using FAX-ed hand written instructions and pencil sketches from the Factory.

There was no longer any smoke in the exhaust after the "repair", and starting was much easier.
 
Emailed Ollie about getting rings/pistons checked at some point in the future, my oils actually quite browned even after only a few hundred Klm's so maybe this is also the blow by.

I guess Ill attack the easy checks first (oil level, anti wet sump check valves, scavenge performance) before resorting to stripping down an essentially brand new motor.

Thank you for all your insight, Ill update and respond in the "Oil in the Airbox" thread from now on
 
Can you do us a favor and measure your oil stick and lets compare it to the image of the Norton stick. ?
 
My newer dipstick has the knurled section higher up the stick, about between the 3 and the 4 on the stick above. The knurled section on the dipstick above has the knurled section about where the marks were on my original stick. My old readings were at the high mark on the old stick and dead center of the knurled section on the newer one. Hasn't budged in 5k miles. Just did an oil change but accidentally went a bit higher than the knurled section and this bike knows it. First time in forever did I get a little runoff, then it stopped.
 
If its working for you that's good. I remember discussing this with you before and I could never explain how you got a stick that was different than the rest of us who got the breather kits.
 
Looks like you have the old type dipstick Britfan. This is my new pattern Norton stick; same as Bluey’s. Displayed dimension accurate to within a gnats left knacker. Admittedly the gnat was drinking red wine last night. You’ll have to excuse the angle of the dangle!

“WHICH PARTS FROM OTHER BIKES FIT THE 961”
 
TonyA said:
If its working for you that's good. I remember discussing this with you before and I could never explain how you got a stick that was different than the rest of us who got the breather kits.
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Ok moved this Oil topic across to link below, I have dropped the oil and am concerned.

www.accessnorton.com

Unraveling the 961 part two (oil in the air box)

This looks interesting if your going to change the external oil cooler side non return valve, can actually see it in operation. From Old Britts, the one I saw was all aluminium but upon enquireing they posted this back, a little window on your oil. I like it ...
www.accessnorton.com www.accessnorton.com
 
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