Here we go again

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How about you?
I'm too buried in work. But I know someone in Germany who has successfully finished a race season with all alum cylinders with Nikasil coating. I've been keeping in touch and he says he's getting a good seal with a 79mm bore and there's no problem with distortion where the cylinders are closest. He won't tell me how he did it and I suspect he might have monetary plans but I'll believe it when I see it.
 
That was a nice cruise. You're stuck with unbanked curves same as me. I have to drive 60 mi. or so to get into some of the old roads that still have a few.... that is if they've not gone through and flattened them since I last was there. Bike is running strong too.... Most impressive.

I'm pretty happy. I don't think it's going to rip right up to 8000 like it did with the old cam but, there was no roll on wheelies with the big cam either.
The midrange is really strong and it pulls up to 6500 [120 mph] easily. That is actually plenty of revs for a 92mm stroke motor.
I'll be finding some good twisties next week. Jim
 
You would have to cast up some special alloy cylinders for the nickasil method.
The alloy cylinder I have here hasnt any skirt protruding into the crankcase, it relies on the iron cylinder liner for that.
This is a fairly fragile area on the stock cast iron cylinders at standard bore, not sure what it would be like in cast aluminum with an 80 or 81 mm bore.
 
You would have to cast up some special alloy cylinders for the nickasil method.
The alloy cylinder I have here hasnt any skirt protruding into the crankcase, it relies on the iron cylinder liner for that.
This is a fairly fragile area on the stock cast iron cylinders at standard bore, not sure what it would be like in cast aluminum with an 80 or 81 mm bore.

It would be tough to gravity cast a barrel for Nickasil. Porosity would be a problem. Most barrels for Nickasil are pressure die cast or spun cast.
The option would be to use spun cast aluminum liners in a gravity cast barrel.
I did that with the barrels from Maney and Left Coast Racing but they both went out of round in a few hundred miles.
Or you could always mill from Billet...
But for long life you still need cast aluminum liners. 6061 is too soft to be durable with Nickasil. The aluminum gives way beneath the Nickasil.
 
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Here is the last one I did. It uses spun cast 355 aluminum liners. Not yet tested.
Here we go again
 
WOW, there's just no end your abilities Jim.
Always nice looking your work Jim, Carry on..
 
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Alum cylinders with Nikasil coating are common on modern bikes and they work for earlier air cooled bikes and chain saws. They should be available for Nortons as well. But why not cast them similar to the Jap bike and chain saw cylinders? The market is waiting.
 
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Doing kinda takes the talking right out of things. That is excellent looking work... When are you going into production? As the vultures patiently await.....
 
Doing kinda takes the talking right out of things. That is excellent looking work... When are you going into production? As the vultures patiently await.....

Not likely to go into production. Possibly a few one-offs.
Milling from billet, then sleeves, then coating. The price will be pretty silly.
But first I will have to see if it actually works...

But then again, there are a few billet cases out there at silly prices....
 
Not likely to go into production. Possibly a few one-offs.
Milling from billet, then sleeves, then coating. The price will be pretty silly.
But first I will have to see if it actually works...

But then again, there are a few billet cases out there at silly prices....

There is no shortage of silly around here.
 
Thanks for the video Jim. My lower back pain has kept me off my Norton for a few days now, but watching the video was like a "fix". And at 5000/6000 + feet your induction is a wonder.

I could hear your engine smoothing out and appearing to gain grunt, which you highlighted prior to the ride. I, also, thought I heard the clutch slipping toward the end of your ride??

They don't make 'em like you anymore!

Best!
 
Thanks for the video Jim. My lower back pain has kept me off my Norton for a few days now, but watching the video was like a "fix". And at 5000/6000 + feet your induction is a wonder.

I could hear your engine smoothing out and appearing to gain grunt, which you highlighted prior to the ride. I, also, thought I heard the clutch slipping toward the end of your ride??

They don't make 'em like you anymore!

Best!

Yeah, I did get just a small bit of clutch slip when I hammered it. It didn't do that with the big cam.

I don't plan on doing anything about it until I get the TTI trans installed though. I doubt the stock trans would take any more.

And I am looking forward to LOP at ~sea level. There's vitamins in the air down there.
 
If you want to go for a nice easy 20 minute ride here is the break-in video.

The bike is on autotune due to the new cam. It has a few rough spots for a while.



Nothing like a good run in video, sweet, none of this pussy footing around with it, get right into it, going out and fire up my Norton and take it out for a spin now, a good 26c today so not so hot which will hit us soon, anyway thanks for the ride Jim.

Ashley
 
Now Dave has the right idea. There is no plan better than silly.... It's worked for me so far... Watched that vid again earlier and it forced me to go for a spin. Been trying to keep them to a minimum while waiting for the front ISO's to get here Monday.... You guys made me go Vernier BTW...… After the vid I only hope you don't force me into something 'silly'. Seeing that makes me want more.
 
If you want to go for a nice easy 20 minute ride here is the break-in video.

The bike is on autotune due to the new cam. It has a few rough spots for a while.




Jim, I cam understand how people simply want to make their Commando the best, but I don't understand why they do it with a road bike. Yesterday I was driving through our town and parked by the side of the road was a very lovely and close to original 850 Commando which I would love to own and cherish. But at all costs, I would preserve it's originality because that is here the value is in an old bike. I am now 78 - I had my first bikes when I was 15. However when I was 14, I had gone with my uncle who had a Triumph Thunderbird, to watch Geoff Duke race the Gilera at Fishermans' Bend in Melbourne. My whole live has involved motorcycles, they even helped me fail most of my year twelve exams, which resulted me in studying part-time while working to become a scientist. I started with a Model 741 Indian and a 250cc T6 Triumph, progressed through many hotted-up Triumph 650s, then went road racing when I started having too many near misses on publis roads. These days my motorcycle keeps me alive. What I am about is improving my Seeley Commando 850 and proving it by racing. When you improve a road bike, you cannot really use it in the way nature intended.
I really like the work you do. However have you ever thought of building a race bike and finding a good rider for it? When you achieve through racing, you are competing against other dedicated guys. If you come out in front, you have really done something. In Australia, we have one guy Jerry Kooistra who owns an engineering business. He raced small capacity Honda twins with a girl as rider. He has done what he set out to do and now has given the game away. We have Ken Horner who is doing similar with the Irving Vincents. I think the work you are doing is excellent but 'the proof of the pudding is in the eating'.
 
Jim, I cam understand how people simply want to make their Commando the best, but I don't understand why they do it with a road bike. Yesterday I was driving through our town and parked by the side of the road was a very lovely and close to original 850 Commando which I would love to own and cherish. But at all costs, I would preserve it's originality because that is here the value is in an old bike. I am now 78 - I had my first bikes when I was 15. However when I was 14, I had gone with my uncle who had a Triumph Thunderbird, to watch Geoff Duke race the Gilera at Fishermans' Bend in Melbourne. My whole live has involved motorcycles, they even helped me fail most of my year twelve exams, which resulted me in studying part-time while working to become a scientist. I started with a Model 741 Indian and a 250cc T6 Triumph, progressed through many hotted-up Triumph 650s, then went road racing when I started having too many near misses on publis roads. These days my motorcycle keeps me alive. What I am about is improving my Seeley Commando 850 and proving it by racing. When you improve a road bike, you cannot really use it in the way nature intended.
I really like the work you do. However have you ever thought of building a race bike and finding a good rider for it? When you achieve through racing, you are competing against other dedicated guys. If you come out in front, you have really done something. In Australia, we have one guy Jerry Kooistra who owns an engineering business. He raced small capacity Honda twins with a girl as rider. He has done what he set out to do and now has given the game away. We have Ken Horner who is doing similar with the Irving Vincents. I think the work you are doing is excellent but 'the proof of the pudding is in the eating'.

Jim has already done the race bike thing. I’m guessing the massive expensive of racing coupled with the few races doesn’t make sense if you’re developing engine technology. In racing you’re limited to the number of races to test something out. With a road bike you just hop on. Need to prove your modification will last 10k miles? That’s like 100 years of racing.
 
Jim, I cam understand how people simply want to make their Commando the best, but I don't understand why they do it with a road bike.
Al,
I get that for you Motorcycles are all about racing and using at a track, you consider the risks of riding on the road too great to contemplate your involvement. For me, I would consider the risks of riding for long periods at speeds in excess of 120mph with other doing the same or greater speed to be too dangerous to contemplate my involvement - I would never ride my motorcycle at a track. I do, however, ride on the roads most days.
I don’t need you to tell me it’s safer racing - we will have to agree to disagree
We each enjoy Motorcycles for our own reasons, we each assess and accept the risks of what we do - race track, speedway circuit, road or off road and that is what makes motorcycling such a broad church.
None of us are totally right or totally wrong - we just need to accept that each of us shares a common interest and respect each other for that. I am in awe of the skill shown by racers and regularly watch MotoGP, BSB, WSB, IOMTT etc, I am also in awe at the skills shown by our motorcycle Police riders in the U.K.
As I say, each to his own and who are we to criticise the decisions made by others
 
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