Head studs -more aluminum bronze inserts
- Thread starter comnoz
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Ya know, Jim, I have a machinist background with a little Smithy 3 in 1 unit in my basement and when I watch you doing this stuff and get pretty geeked up. Even if I couldn't ride, I think I would still own a Norton Just to work on it.
I find it hard to believe that I have my 72 just the way I want it with realistically nothing to improve upon after years of loving labor to get it that way (alot of R&D, "R"esearch and "D"ollars).
I started Hobbying with RC planes for a while and although flying them was ok, my real joy came from building them, and seeing them actually fly had a profound effect on being quite happy spnding all of my free time in the basement. It was the same when building a newtonian telescope with the satisfaction of seeing a fine star image in the eye piece after a few hundred hours of grinding, polishing and figuring a raw slab of pyrex.
As far as the Norton goes, I think I have this sickness where when something goes wrong with the bike, I have a strange feeling of satisfaction knowing that I get to get back in there and deal with whatever it might be, and the more serious the better.
I was wondering, on your last trip when you had your litte seizure issue, was there a part of you that might have cracked rye smile thinking that "oh well, back in I go"?
I realize that there is nothing like riding the Norton, particulary the one you create with your own to hands, but there really is nothing like working on them either. God what i wouldn't give to do this stuff all the time and still be able to pay the mortgage.
So, just let me thank you for being so generous to share vids with us. It truly make this sub zero weather here in Michigan bearable and spring seem a little nearer.
Peter
I find it hard to believe that I have my 72 just the way I want it with realistically nothing to improve upon after years of loving labor to get it that way (alot of R&D, "R"esearch and "D"ollars).
I started Hobbying with RC planes for a while and although flying them was ok, my real joy came from building them, and seeing them actually fly had a profound effect on being quite happy spnding all of my free time in the basement. It was the same when building a newtonian telescope with the satisfaction of seeing a fine star image in the eye piece after a few hundred hours of grinding, polishing and figuring a raw slab of pyrex.
As far as the Norton goes, I think I have this sickness where when something goes wrong with the bike, I have a strange feeling of satisfaction knowing that I get to get back in there and deal with whatever it might be, and the more serious the better.
I was wondering, on your last trip when you had your litte seizure issue, was there a part of you that might have cracked rye smile thinking that "oh well, back in I go"?
I realize that there is nothing like riding the Norton, particulary the one you create with your own to hands, but there really is nothing like working on them either. God what i wouldn't give to do this stuff all the time and still be able to pay the mortgage.
So, just let me thank you for being so generous to share vids with us. It truly make this sub zero weather here in Michigan bearable and spring seem a little nearer.
Peter
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pete.v said:
Well I might have had a though like that except for the fact that I was on a deserted blacktop 35 miles from the nearest tiny town, there was no cell phone service and it was just getting dark and starting to snow. I was wondering how I was going to get my tent set up in the wind......
Fast Eddie
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comnoz said:
Trivialities Jim!
You can't fool us... all the time you were battling with that tent in the wind you were doing a mental 'cause and efffect' analysis and planning your next build...!
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so those are the three that have to be upgraded from 5/16 to 3/8 (reading CNW website), ive been looking at all their nice ARP stuff and just drooling, but the jigsaw puzzle should be here friday and then i will see what i really need to get it running.
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850dunstall said:
Those 3 studs are originally 3/8th inch. The original thread pitch was 20 tpi. That is a pretty fine thread for good holding power in aluminum. You can install a helicoil with the original thread pitch but they are still prone to pull.
CNW takes care of the problem by installing a US coarse thread helicoil and using an ARP stud. This holds pretty well but it will not fix the problem if it already has a pulled British helicoil.
I use Al Bronze inserts with either a 14mm -2.0 thread or a 5/8- 12 to repair even the largest pulled inserts. Jim
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hi Jim, great to see such excellent work there. My 2 front studs have pulled, but only found out after the head went back on 4 years ago. Both nuts fell off after a while so it is just as well I used black RTV silicone smeared very thinly on both sides of the reused head gasket.[ yes reused because I thought I had a new gasket , but all my spares are for the 750, and cant wait to get the bike back on the road.] I have been lucky nothing has gone wrong and there being no leaks from the head gasket. I wonder if anyone in NZ does what you do. I have thought about fitting UNC helicoils but from what you have just said here, they may not last.
Dereck
Dereck
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ludwig said:
The CNC machine makes it easy to get the depth just right so I don't have to worry about breaking through into the exhaust port. The threading tool also cuts threads to the very bottom of the hole without having a lead in taper that often breaks through even if the hole was not drilled through to begin with.
I have seen a lot of heads where the hole has broken through into the exhaust port. I can't say it has seemed to cause any problems though.
If I am installing inserts in a head that has broken through I just put some tape over the hole and support it with a piece of foam rubber. Then I use a little extra JB weld under the insert and smooth it off after it sets up.
In cases where the hole was drilled very deep into the port I have used longer inserts and then ground them to blend in with the port after installation. Jim
I do not think that applies here. This is not a repair issue and the JBW should be considered as an ultra uber mondo thread locker and in conjuction with an interferance fit........well.......not that it wouldn't be possible but I wouldn't want to have to take them out.hobot said:
How dare you question the "man".
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pete.v said:
I think Steve-o-bot was referring to this comment from the man:
comnoz said:
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[video]https://www.youtube.com/watch?v=mfwN0X8YnWo[/video]
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Must as sucks to live in weird states, does have high points and flashback, that I laugh at myself too, ah sothe flashbacks, got laid using that song to make up for an affair. Just got to spark em in the right phase of their cycle. Btw teh way I raed conmoz was beisdes thraed locker he'd also fllied in some missing alu stutctuer.
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