1971 Interstate Fastback restoration

ML said:

motoalchemist said:

Hello, things are moving along nicely. I do need help IDing this unit ---and where does it go?
also, is there ar picture of the wiring of a commando on this forum somewhere?

You're doing this without the factory manual? Better get one because there are several versions of factory wiring schemes. The manual or pages from it are available on the web or maybe some members could advise?

Mick

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Yes I do Have a factory manul...I guess what i meant to say, is there any "pictures" of wiring, I am dealing with some wire routing issues. Not so much as what goe where.

THANKS, for Identifieng this part. I called Bob Raber and he says that since I have converted to the Boyer EI, I do not need to put the resistor back in. Im thinking good because it sure is a ancient looking part. wouldnt want to have to buy a new one

rvich said:

My dog would be trying to figure out if that bit was being offered as a treat! I get rid of more old ballast resitors that way.

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Gee you are good with out of focus pictures, all I could do was to shrug my good shoulder :lol:

Jean

Hello,
Just got the side panel finished. These are the Interstate side panels I trade for my original commando panels. If you look at my pictures in the Flickr side youll see the old side panels. These panels will make it easier for my Interstate tank to fit. Eventually i want to get steel panels, these are fiberglass.

Re: 1971 Interstate Fastback restoration cable routing?

hi there.
I think the rear brake cable goes between the exhaust brackets not between bracket and swingarm.

looks great

Re: 1971 Interstate Fastback restoration cable routing?

KEV-C said:

hi there.
I think the rear brake cable goes between the exhaust brackets not between bracket and swingarm.

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Ya, I was wondering about that...the pictures i took of the bike "before" I took it apart had the cable routed this way...but it doesnt look or feel right. i think i will take the brackets apart and try it your way.

Thanks

I dunno if this will help but here are some photos of the wiring on my bike with the seat removed. It is pretty much a stock set up.



The above photo shows the main harness coming thru the grommet in the frame and then splitting. On the right it runs back to the tail light/flashers and down to the zener diode. On the left it goes to the flasher unit, rectifier and down the left tube for the brake light switch.



In the above you can see the capacitor behind the battery. In front of the battery I have a group of six wires, none of which are being used right now. They are purple-brown, purple-black, brown-blue, brown-black, green-purple, and red. They are for the horn (which no longer lives under my battery tray) and interpol stuff (I think). I am still in the process of cleaning up unused wires and modernizing some of this stuff. Most likely one of this winter's coming projects.

Let me know if this helps, or if you need something else.

Russ

rvich said:

I dunno if this will help but here are some photos of the wiring on my bike with the seat removed. It is pretty much a stock set up.


The above photo shows the main harness coming thru the grommet in the frame and then splitting. On the right it runs back to the tail light/flashers and down to the zener diode. On the left it goes to the flasher unit, rectifier and down the left tube for the brake light switch.


In the above you can see the capacitor behind the battery. In front of the battery I have a group of six wires, none of which are being used right now. They are purple-brown, purple-black, brown-blue, brown-black, green-purple, and red. They are for the horn (which no longer lives under my battery tray) and interpol stuff (I think). I am still in the process of cleaning up unused wires and modernizing some of this stuff. Most likely one of this winter's coming projects.

Let me know if this helps, or if you need something else.

Russ

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Russ, perfect, this helps tremendously.

Tyler

Thanks for the help with the wiring photos (russ) and everybody else.

I have decided I am going to route my crankcase vent on the left side of the cam overboard (I have the modified vent on the right side also out of the old magneto port). It was suggested I run the vent line all the way past the bike in case i ever get a wet sump" the oil wont spray all over my bike and tires. In the process of routing the vent hose I thought it would be nice to bend up a hard line tube for the subframe.

Here is the aluminum tube I bent up before mountingon bike



Here is the Line held in place



and the bend around the shock mount



Looking up and installed Line



Looking from rear of bike

I'd suggest something considerably larger for the breather, at least 5/16" ID or better yet 5/8. There's a lot of restriction in a small tube that long. Hose can be used that will lay inside the frame with a few wire ties, exiting at the rear fender behind the license plate so it is not visible at all.

Any reason you don't connect the engine breather to the oil tank as the factory did? With the oil tank vent then connected to the air box you get a filter to outside air.

When you get finished come join the club rides.

The NCNOC will be celebrating our 40th anniversay in 2011. Watch the website for invitations to all to join us.
www.nortonclub.com

illf8ed said:

Any reason you don't connect the engine breather to the oil tank as the factory did? With the oil tank vent then connected to the air box you get a filter to outside air.

When you get finished come join the club rides.

The NCNOC will be celebrating our 40th anniversay in 2011. Watch the website for invitations to all to join us.
http://www.nortonclub.com

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This vent is in addition to the vent to the oil tank. I still have the vent from the old magneto location to the oil tank installed, so Im doubling up. The original owner actually had this vent I just installed plugged up with a bolt.

MexicoMike said:

I'd suggest something considerably larger for the breather, at least 5/16" ID or better yet 5/8. There's a lot of restriction in a small tube that long. Hose can be used that will lay inside the frame with a few wire ties, exiting at the rear fender behind the license plate so it is not visible at all.

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Yes I know, but what i guess I didnt mention is that this vent is in addition to the crankcase vent I have going from the old magneto spot to the oil tank. I am running the hose overboard as was recommended by Bob raber just in case of a wet sump I wont get oil spray all over my bike and tire.

So I have 2ea. 3/8" vent lines venting the crankcase. that should be ok?????

motoalchemist said:

MexicoMike said:

I'd suggest something considerably larger for the breather, at least 5/16" ID or better yet 5/8. There's a lot of restriction in a small tube that long. Hose can be used that will lay inside the frame with a few wire ties, exiting at the rear fender behind the license plate so it is not visible at all.

Click to expand...

Yes I know, but what i guess I didnt mention is that this vent is in addition to the crankcase vent I have going from the old magneto spot to the oil tank. I am running the hose overboard as was recommended by Bob raber just in case of a wet sump I wont get oil spray all over my bike and tire.

So I have 2ea. 3/8" vent lines venting the crankcase. that should be ok?????

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Shouldn't hurt anything.

Mufflers arrived from Norvil today...stand by for some new pics.

Yesterday the mufflers I ordered from Norvil arrived. Today i spent a few hours fitting them. Here are some pics .

Here is the right side completed



The left



And a butt shot



Now its just wrapping up the electrics. I have a new battery standing by.

Fine looking bike you have going.

Have you run it at all with your two breather system? The reason I ask is that I have a '71 with only the left hand side camshaft breather and it really help evacuate the sump after it sits for a while. But even during normal operation once the sump has cleared it still moves some oil.

I am merely curious and am trying to get a better handle on the breathing of a '71. I have gotten down the theory of creating a vacuum in the crankcase, but there seems to be much less info on modifications to the '71.

best of luck with the rest of the build, I wish I could be doing the same right now.

cheers
john

jnstrong said:

I am merely curious and am trying to get a better handle on the breathing of a '71. I have gotten down the theory of creating a vacuum in the crankcase, but there seems to be much less info on modifications to the '71.
cheers
john

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If I really wanted a 71 to breathe I'd block the camshaft breather and put in something like what ludwig did. Or do the CNW mod and cut a hole in the crankcase.

thanks for the help.

-john

Swoosh,

Do you have a link to ludwig's breather? Maybe I missed that somewhere. I am still planning on using the camshaft breather at this point, but probably just for originality until it leaks like the Horizon. I'm planning on keeping this '69 in my spare downstairs walkout bedroom for the winter and longer stays although probably with draining most of the oil.

I do have some thoughts though, Nelson also has a '69 and is experiencing the oil drip from the front of the oil tank into the air filter. He tried venting the breather to the air and it produced a lot of oil. That hat in the top of the oil tank is a sort of primitive separator from oil vapor to oil tank. Trouble is the tank needs to breathe and they put a vent into the air filter which always leaks dribbles of oil onto the top of the gearbox. I was thinking of soldering/brazing a fitting on the hole in the air filter area from the oil tank and running that dripping oil out the front of the airbox (the chrome thing) and down below the bike on one side so it doesn't drip on the wheel. At this point I don't have a running bike, so I can't try this, but plan to. I have also upgraded all the o-rings to real seals. When I get this together later this summer, I'll report, unless someone has a good idea for the '69-71's breathing without going to extremes.

Dave
69S