Here ya go, he keeps pulling out the good stuff, check his other items
http://www.ebay.com/itm/300874163676?ss ... 1423.l2649
http://www.ebay.com/itm/300874163676?ss ... 1423.l2649
Interstate Freshening
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For a stocker road bike done on a budget, one could just use the regular parts and still have a good running engine. One item I would splurge a bit on would be valve springs. R/D in the US makes springs that will still be in the proper working range after many thousands of miles. If the UK supplied Norton springs are anything like the UK supplied Vincent springs, they are made of cheese.
After a couple thousand miles they are clapped out and only showing about one third of required spring pressure.
At that point it doesnt matter what components are in the rest of the engine, it will be a slug.
At the IOM circuit in 07 my old Rapide went by 31 bikes, mostly on power. Most or all of those bikes have the cheapo UK springs and will barely do the ton. My old Rapide will hold 120 on the flat and pulled up the mountain showing 105 on the speedo. This is exactly what it should do (Black Shadow tuned) but very few nowadays will. I believe the R/D springs are the main reason for the good top end in that bike. They are every bit as good as the originals were, maybe even better.
The R/D site shows them available for Commandos about $220 per set. I think this is for all four valves. Much better deal than for the Vincent, those are not stocked so minimum 100 sets per order (25 engines, so we do a group purchase) at about $400 per complete engine. Still well worth it.
Glen
After a couple thousand miles they are clapped out and only showing about one third of required spring pressure.
At that point it doesnt matter what components are in the rest of the engine, it will be a slug.
At the IOM circuit in 07 my old Rapide went by 31 bikes, mostly on power. Most or all of those bikes have the cheapo UK springs and will barely do the ton. My old Rapide will hold 120 on the flat and pulled up the mountain showing 105 on the speedo. This is exactly what it should do (Black Shadow tuned) but very few nowadays will. I believe the R/D springs are the main reason for the good top end in that bike. They are every bit as good as the originals were, maybe even better.
The R/D site shows them available for Commandos about $220 per set. I think this is for all four valves. Much better deal than for the Vincent, those are not stocked so minimum 100 sets per order (25 engines, so we do a group purchase) at about $400 per complete engine. Still well worth it.
Glen
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Would you recommend the Web Cam over the Megacycles?
Does the Web Cam 12 need radiused or flat tappets?
I should just assume that you'll set up the head for the camshaft with the correct springs and such.[/quote]
I would use the web-cam over the megacycle. Mainly because of customer service.
The Web-cam #12 is designed for flat followers. It is very close to stock- just slightly more lift. It is the standard cam in the CNW bikes. I would fit a Kibblewhite spring kit. Jim
Does the Web Cam 12 need radiused or flat tappets?
I should just assume that you'll set up the head for the camshaft with the correct springs and such.[/quote]
I would use the web-cam over the megacycle. Mainly because of customer service.
The Web-cam #12 is designed for flat followers. It is very close to stock- just slightly more lift. It is the standard cam in the CNW bikes. I would fit a Kibblewhite spring kit. Jim
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Snorton74 said:
Yes, drill the case and sump plug breather (Jim, put one aside for us!).
Unless the rods are shot (they probably are fine) then it will be just fresh bore, pistons and rings. And cam. And springs. We'll save the JS goodies for the Rusty Combat.
johnm
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Not a particuarly helpful comment now but I would hazard a guess and say that this bike once sat for a long time (years) before being put back into service.
It look like it has stuck rings and surface rust on the cam body. If you start a bike from long storage without pouring oil down the push rod tubes you will tear up the cam immediately.
On the plus side inside the combustion chamber and piston tops look good for a bike with this mileage.
Looks like its going to be a nice bike
It look like it has stuck rings and surface rust on the cam body. If you start a bike from long storage without pouring oil down the push rod tubes you will tear up the cam immediately.
On the plus side inside the combustion chamber and piston tops look good for a bike with this mileage.
Looks like its going to be a nice bike
johnm said:
You have a keen eye. This bike has been well used but twice in the last 15-20 years it suffered from non-engine related issues that forced it out of service for a long time (over a year at a time). I did not pour oil down the pushrod tubes before bringing it back into service, but i wish i had.
I am still trying to come up with a reasonable time frame for determining when a bike has sat for too long; when it should be considered that it has been more or less "in storage". I just took my roadster for a ride on Sunday after about a month and a half, and it started right up (fortunately, like always!). Too long?
I need to get out to the garage and check the rocker movement with a dial indicator, at least to have a baseline for future reference!
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I can't imagine that infrequent restarts would cause this much damage. We would see widespread issues like this.
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worntorn said:
Technically? Our dad. :mrgreen:
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I think they are brothers, that's what I get out of it. :?
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Blue noser said:
You could always read the first post. :mrgreen:
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Hi All.
This is my first post here on this excelent forum, though I´ve bin member for some time and have read many interresting threads.
I have a MKIII and have had it for about 10 years. I have 2 cams that looks like the one in the photo. When we found the first one we (my dad and I, he has a 750) thought it was just a "soft" cam, as all the stories tell. Fitted a new standard cam, that was also soon gone, then we got suspicious. Then a Megacycle cam, that seems to be okay, at least it was last time I had the chance to have a look at it.
If this is a lube problem, then why is it always the left inlet and only the left? Why not both inlets or left in and outlet? Till now, noone has bin able to come up with a good reason???
Dan Christoffersen. Groningen, The Netherlands.
This is my first post here on this excelent forum, though I´ve bin member for some time and have read many interresting threads.
I have a MKIII and have had it for about 10 years. I have 2 cams that looks like the one in the photo. When we found the first one we (my dad and I, he has a 750) thought it was just a "soft" cam, as all the stories tell. Fitted a new standard cam, that was also soon gone, then we got suspicious. Then a Megacycle cam, that seems to be okay, at least it was last time I had the chance to have a look at it.
If this is a lube problem, then why is it always the left inlet and only the left? Why not both inlets or left in and outlet? Till now, noone has bin able to come up with a good reason???
Dan Christoffersen. Groningen, The Netherlands.
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The only cam I destroyed was in Peel over rev, which lost most her RH exhaust lobe peak and less so the otehrs closer to the LH. Don't think there is any rymthm or reason for one side to go first or last - just luck of the draw on which area is the softest in production - but maybe you are on to something - so might open a lost cam lobe survey. I'll be looking in frequencly on next Peel and if I see evidence of early wear wil see about nitriding and micro-polishing.
Blue noser said:
I figured out that they are brothers but couldn't understand why they both seemed to speak as though they owned it. Makes perfect sense tho, knowing that their Dad is the rightful owner! :mrgreen:
A friend owns an rc 51 of which he is very proud. He posted up on the BC sportbike forum that there are just three kinds of people in the world:
1. Those that own an RC 51
2. Those who have never owned and RC 51 and desperately want one
3. Those who have sold their RC51 and wish they had not.
His 40 year old son also is on the forum, he posted under his Dad's statement. According to the son, there is also a fourth type of person. The fourth type is someone who intends to inherit an RC51. :mrgreen:
Glen
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worntorn said:
Never wanted a RC51.
So I originally owned the Interstate. I bought it in 1992 or so. I sold it to my dad a few years later. I don't think he liked the right shift. My brother rode it for a while until he restored his Roadster.
We're just collaborating on the repair. Since I tend to be the most verbose on the forum I thought I'd get some feedback.
Not sure why you guys care.
Any other questions? :mrgreen:
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