Indeed Clive!!
You can tune the fuel map with a Dyno Jet PCV installed . Most dyno shops can work with the Dyno Jet .
Thats a common problem and remedy . Some folks use Rislone Motor Treatment for sludge removal.
Have you thought about replacing the rocker towers ? In case there is placement issue with the towers because of wear etc.. Norton have them in stock . Are the new rockers wider than your original rockers ? Or any dimensional differences from the old ones to note ? Maybe Stu Bodycote can measure some of his when he is in the rocker cover (the clearance between) . You should PM him . Is this the intake rockers only ? I will check my clearance when I get in there and will report back.
No rocker problems on mi rotary.
Courtesy of Marco over on FB. He’s building a rotary and is gonna dress it like a 961! Why wouldn’t ya?
I’m full of admiration for those with the tenacity and talent to produce one off specials like this. Looking forward to seeing the finished product.
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Hi Peebee , Do the rotaries use oil like a two stroke ? When I went to Norton in the early eighties they showed me the frame oil tank and said they were using 15w40 motor oil .No rocker problems on mi rotary.
Yep they sure do but not nearly as much as the strokers. I used Shell Rotella X 40 in mine but a lot of folk tried different oils which were more easily available. This was the oil used by Norton when first bikes were being sold some said because of low ash content, whatever that means in a technical sense I used to buy t in 20 gallon drums and it lasted a long long time. I suggest you become a member of the NOC because the info you can get from them is well worth the few dollars every year. They have a forum dedicated to the 'Hoovers from Hell'
and there's a guy called Graham Wilshaw from 'Startright Motorcycles' in Leeds who is the Uber Guru of all things epitrochoid related. Good luck with the project and here is a pic of my old girl, 113K miles original sprocket and chain it's amazing what a cup full of oil can do in a enclosed chaincase. https://imagizer.imageshack.com/img921/3234/mGzxWs.jpg
Thanks Tony.
Can't even think how much that would cost and could not bring myself to buy them as they are not complicated just big lumps of aluminium. I have perfectly serviceable shim washers from the old rockers so could clock the towers up on a milling machine and skim them to take 1 or 2 extra shims.
Nice air cooled Norton rotary !Yep they sure do but not nearly as much as the strokers. I used Shell Rotella X 40 in mine but a lot of folk tried different oils which were more easily available. This was the oil used by Norton when first bikes were being sold some said because of low ash content, whatever that means in a technical sense I used to buy t in 20 gallon drums and it lasted a long long time. I suggest you become a member of the NOC because the info you can get from them is well worth the few dollars every year. They have a forum dedicated to the 'Hoovers from Hell'
I priced them out just a few days ago and was quoted $261 USD each there are only two of them . My thinking was they would be in specification and you said you had wear on yours. Would it make more sense to just source another thinner or thicker thrust washer ? Make sure your pushrods are straight also.
I think it should work . I went to BSD in UK to get mine and software is free from Dyno Jet . It only needs to plug into the fuel injector plugs ,the TPS and ground . Email this outfit in UK and they will give you instructions on how to wire it in. Remembering you must tap into the TPS wires because no plugs are available for Norton 961.
I thought about using a Scotoiler for this very reason and I got a lot of bad feedback from those who have used it. Do you have any experience with a Scottoiler ?
I have a vacuum Scottoiler with a single feed drip tube fitted to my KTM 690 Duke it is the same one I have had for my last four bikes. Every time I change bikes I take the oiler with me it must be over fifteen years old now but still works. My personal observations are they are a brilliant bit of kit when set up right and once you get it the way you want it just leave it alone, don't start buggering about with it. Never tried an electronic one always stayed simple, some people just can't seem to get on with them for some reason maybe they haven't set them up correctly or summat. You will get 'Fling' that's really inevitable but how much splatter depends on the way you set it up, and when correct it is no problem giving the swing arm or number plate a quick wipe down after the ride, that's the downside but when you see the chain with a coating of oil glistening in the sun light you know you're doing the best you can to maintain it and cut down the number of times it will need adjusting.
Thanks Tony!
Thanks Tony!
Ever thouight about bringing it to Stu Bodycote and letting him have a listen . You should let him drive it so he can hear what you're hearing. He can't be too far from you ? This makes good sense to me , letting him drive it and hear it for himself .
Well you are on the track of what I was going to say about oil and oil pressure. I would put a gauge on the bike to confirm(under load) what the pressure is at that RPM. We have had lots of experience in the last few years with oil pressure issues
Yes I think it would certainly be useful to be able to monitor that oil pressure.