Exhaust Down pipes, correct angle out of head

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elefantrider

elefantrider

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Someone once told me that correct pre'72 down pipes had the flanges welded or pipes bent at an angle out of the head. So the pipes do not come straight out of the head like triumph pipes. Therefore he said I should keep the originals and have them rechromed. All the repros I have seen are not angled but rather look like triumph pipes. Anyone else notice the same?
 
funny I asked about the same thing a couple of days ago. Every photo I see of a pre 72 commando has those pipes yet various suppliers say they don't do them. Why. Or who sells them. regards,
Dereck
P.S. they look better.
 
Sorry buddy

Just butting in , aye or no

Exhaust Down pipes, correct angle out of head
 
A good indication is the sales brochure as far as what was done from the factory. Looks like the fastback with Atlas mufflers had the angled at the head pipes. All the models with reverse cone mufflers have straight out of the head pipes. There's an ad from magazines with 1970 roadsters...has straight out pipes.
 
There is a difference between what Norton issued and what's available today with various angles and bends to mix-match to clear stuff all the way past engine cases, frame tube, kicker swing and muffler mount straining. I've been though half dozen headers from Victory to ebay to Jerry's pipes and all needed some tweaking-FORCE to route adequately though by far the Victory were the worse for not fitting 12 yr ago but now doing fine on Trixie after bench grinding header flange and drill grinding inside of exhaust nut plus a mild kink at front required so didn't beat-heat the points cover.

This is not my photo so don't know the pipes shown, just the variably to look out for.
Exhaust Down pipes, correct angle out of head
 
Viking exhaust have made pipes for my '69 fastback with the correct angle exiting the exhaust port 15 degree I think.
Al
 
Just keep in mind vendors and manufactures like the Victory fella time to time loose control of their products so luck of the draw if your item suffers or not. I had phone contact with Victory fella before ordering for Peel to make sure defects solved - but he withheld how sick he was at the time so others handling his business, so not exactly Victory fella's fault which so long ago I forgot his name but no use bitching while he struggled to come back. News of his in-firmness was later reported on NOC and BI lists by those failing to get satisfaction mainly over the rust from cracking and flaking of the extra good and thick chrome that was advertised which so far ain't cracked at the kink in bend to miss Trixie's points cover after lessor quality pipes fractured. Had to open up Trixies bronze LH exht nut so much likely can't use in on next set of pipes that don't require so much grinding to fit to even engage threads to nip up.
 
possm said:
Viking exhaust have made pipes for my '69 fastback with the correct angle exiting the exhaust port 15 degree I think.
Al
Click to expand...

Thanks Al. I had heard, but was wanting some feedback. Did they fit well. I guess they must have because all you bikes look fantastic. See you at Little Wanganui. Dereck
 
auldblue said:
Sorry buddy

Just butting in , aye or no

Exhaust Down pipes, correct angle out of head
Click to expand...

That's what they look like. What I think is most important about them is the down pies in this case are vertical to the ground along the axis of the bike and in line with the down tubes when observed from the side.Whereas the ones that come straight out of the heads, tend to angle inwards as the go down to the bottom. [ at least that is what I have observed as a difference between the 750 and the 850. ]
 
illf8ed said:
A good indication is the sales brochure as far as what was done from the factory. Looks like the fastback with Atlas mufflers had the angled at the head pipes. All the models with reverse cone mufflers have straight out of the head pipes. There's an ad from magazines with 1970 roadsters...has straight out pipes.
Click to expand...
I bought my 750 from Eric Wood in Jan 1973. It was low mileage and I had no reason to suspect it had anything but the original pipes on it.
 
Mine look like the picture also. '71 Roadster. I guess I will need to settle on the straight out repro ones.......am sure chroming will cost probably more.
 
The EARLY headers were KINKEY , probly relates to the muffler type .

Exhaust Down pipes, correct angle out of head


Later PR headers are as per later std , At the TOP .
 
Ref; early header pipes

I bought these from ron fraturelli he said he thought they were original with a good angle coming out the head, they also have a slight upsweep at the exhaust , 1 1/4 bore .

Exhaust Down pipes, correct angle out of head
 
Matt Spencer said:
The EARLY headers were KINKEY , probly relates to the muffler type .

Exhaust Down pipes, correct angle out of head


Later PR headers are as per later std , At the TOP .
Click to expand...

My headers look like this. Angled exit with definite kink at the end to accommodate the peashooter angle. It ain't slight nor do they have the expansion bulge bit that auldblue has posted a picture of.
I always thought they were PR's. 1"3/8 dia
 
Dkt26 said:
Matt Spencer said:
The EARLY headers were KINKEY , probly relates to the muffler type .

Exhaust Down pipes, correct angle out of head


Later PR headers are as per later std , At the TOP .
Click to expand...

My headers look like this. Angled exit with definite kink at the end to accommodate the peashooter angle. It ain't slight nor do they have the expansion bulge bit that auldblue has posted a picture of.
I always thought they were PR's. 1"3/8 dia
Click to expand...

These pipes with expansion bulge are longer , when fitted they are nothing like my 69 headers , less angle out head and they don't sit parallel with the frame. The do offer better access to the old type side stand. What are they , don't know, definitely 1 1/4 bore.

J
 
Its been on my mind for a long time [ since I bought the 850 off Bob Nesbitt ] so whenever I see pictures from when these bike were born, I generally look closely at the exhausts. I have mostly seen these pipes. Incidentally, Bob told me the crew from Worlds Fastest Indian asked him to provide some sound track, so he said he belted my bike up and down the road at Seaview. He said afterwards, that when he saw the film, there were no Nortons in it. I certainly listened for the Norton sound but only heard Triumphs.
regards, Dereck
 
I've bought several items from Armours and my experience with them has been good. No stuff for Nortons but I've had a set of st. st. T160 downpipes on the bike for nearly 30 years and they are still in excellent condition. I have a complete set of chrome TR6C pipes and silencers on a T140V again very good and fit properly, lastly a chrome header pipe on a BSA Victor Special, again excellent quality.
sam
 
Armours refused to take my Victor Special high pipe header back, it was two inches too short, sent them pics and only got it must be your bike back as a reason. Got a pipe elsewhere and it fitted perfectly, still have the short one as luckily it will fit on a B44 engine in a C15 frame.
 
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