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Discussion Starter · #1 ·
My current exhaust headers are getting pretty paper thin, and I’ve had to weld the front brackets back on several times. I bought some “correct” ones, but they were cheap and aren’t profiled very well. Anyway, I like the style of headers that are on it. Does anyone know what year/models (if any) were this shape? They are slip over at the head, and both sides are symmetrical.
Thanks!
Graham



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My current exhaust headers are getting pretty paper thin, and I’ve had to weld the front brackets back on several times. I bought some “correct” ones, but they were cheap and aren’t profiled very well. Anyway, I like the style of headers that are on it. Does anyone know what year/models (if any) were this shape? They are slip over at the head, and both sides are symmetrical.
Thanks!
Graham



View attachment 787533
Have you tried Armour's in England?
Pretty sure they make new high-quality stuff right there
Shipping's cheap and quick compared to the marked-up imported pipes here
 

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That looks like a '68. You don't like the stock '68 exhaust? Looks very similar. Only difference I remember is no kick up at the rear of the header and the mufflers are symmetrical. Your muffler has a bottom entry. Isn't that a T100 muffler?

You may like the look, but those sharp bends after the header leaves the head does nothing for performance. A smoother less angular bend will give you better flow.

Here is a photo of my '66 T120R. The muffler are NOS from a former Triumph supplier whose name escapes me at the present time. The header pipes on the bike were good so I kept them. Note how they are straight where they enter the muffler. Rest of the bike was a full resto I did several years ago.

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Discussion Starter · #5 ·
Rob, I’ve always loved that color scheme on these bikes, and considered repainting mine last winter.

The picture I posted is old, and it now has different mufflers. No idea what the old ones were. The new headers I have will probably be ok. It’s not that I don’t like the original, I’m just used to what it has. I’d just have to make some new brackets.

Who knows what was changed to make the aftermarket headers work. They were put on in the 80s. Are the bends different on each side of your originals? I’m assuming it’s to fit around the primary. My primary side is straight at the exit, and the timing side doesn’t sit as low and has a bend at the exit. The headers aren’t symmetrical which is what trips me up. Is that correct? Just didn’t look right to me. The mufflers can be made to sit even with each other.


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Hi Graham,
View attachment 787533
style of headers
Does anyone know what year/models (if any) were this shape?
The style is pre-'69 - '69-on, Triumph added a balance pipe between the headers a little in front of the cylinder head.

However, your side-on photo. indicates they're pattern headers - both top and bottom bends are too tight to be correct Triumph. If you look at side-on photos. of twins with correct Triumph headers, the 'vertical' between the top and bottom bends follows the line of the front downtube, the bottom bend is a larger radius, following the curve of the timing chest or the primary chaincase.

bought some “correct” ones, but they were cheap and aren’t profiled very well.
Regrettably, “correct” is a 'mare to find, because the originals bend in all three planes. I bought some for my 500 from wholesaler L.F. Harris about twenty years ago, when LFH were claiming to be "making parts to original Triumph drawings", they're pretty (y) but I've since been told later LFH pipes are more (n)

Hth.

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You asked about the header on the other side. Here's a few pics. Last two were taken during final assembly at the end of the restoration process.

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Discussion Starter · #8 ·
Thanks, Rob.

My timing side pipe just looks funny to me. What do you think? To me there’s not enough of a straight section after the first bend.
 

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68TR6R, we offer a faithful reproduction of the original 70-5957/8 exhaust headers from LF Harris. The timing-side pipe has the slight 'kick up' at the end of the header.
-Dave
 

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Discussion Starter · #10 ·
68TR6R, we offer a faithful reproduction of the original 70-5957/8 exhaust headers from LF Harris. The timing-side pipe has the slight 'kick up' at the end of the header.
-Dave
Im pretty sure the LF-Harris is what I got last year. $250 or so.
 

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The pipes in your first picture do not appear to be the same as the pipes in your second photos. Those appear to look more like stock, at least the timing side. My bike is 2 hours away from me so I cannot go out and refresh my aging memory with the subtle details of the header bends.

It almost looks to me like you have two header pipes from different sets of headers. Your timing side header looks correct to me. But the primary side looks aftermarket. And I think that is what you are eluding to. I think you have a mixed set on that bike.

Go do a google search for '68 T120R bikes and look at all the images that pop up. This will help calibrate you to what each side should look like. If you look at my pipes, they appear to be damn near identical. But I do see a slight kick-up at the end of the timing side pipe. But that could be an illusion in the photo. There are so many angles in these pipes that how you shoot them with a camera gives a different impression each time.

But I will offer up this tidbit. If the mufflers and pipes fit, don't get all wrapped up around the axle about it. Use those for now and worry about more important stuff. You can always source another set of headers if you choose after you get better educated on the subject. With the exception of members who work in shops, most of us know our bikes well and then the knowledge starts to trail off as you get into other years/models.
 

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Discussion Starter · #12 ·
The pipes in the second set of pictures are the reproductions I bought a year or so ago. I’ll probably just put my old pipes back on until I find a suitable replacement. Time will tell. Thanks.
 

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Discussion Starter · #13 ·
So I tried fitting the LF Harris pipes (found my old invoice, that’s what they are). Drive side fits well. Timing side, however, does not hang low enough when mounted with the muffler. It’s about one inch from the shifter, and my shoe will touch every time I were to upshift. It’s a shame, they are really pretty. I imagine either I got a mixed set, or it’s a manufacturing defect.
 

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Looking at your photos, the timing side pipe seems to run under the tranny, same as mine. It obviously goes under the peg. Look at the shifter pedal position on my bike and then at yours. You need to raise your shifter up and you should be fine from that standpoint. The muffler mount is a different story. But your photo shows a muffler on there. Is it too close to the pillion peg? It does not seem to be any closer than mine.

I see that the exhaust ports on your heads have been weld repaired. If they have changed the angle that the header leaves the head, that will alter the position of the rear end of the header where it meets the muffler. I'm not trying to pee on your cupcake, but your issue might be rooted in that head repair and not the headers.
 

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Discussion Starter · #15 ·
I’m pretty confident that the exhaust ports at the head in the right spot. I didn’t have to change anything for the old exhaust. My foot peg is lower than yours, and I like the shifter where it is for comfort and operation (for me, personally). I don’t have a picture, but I clamped the muffler on the pipe to fiddle around. With the muffler fitted to its bracket correctly, you can just barely see light between the pipe and the foot peg. If it were 3/4-1” lower it’d be just right. I may fiddle with it some more, but I can’t see a way to make it work without cobbling it together. The front brackets that were on it were definitely fabricated for the old aftermarket headers.

It’s hard to see in the pictures earlier, but the pipe hangs only about half a diameter below the transmission cover.
 

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I have no experience with the EMGO header pipes. But I had a set of their Dunstall mufflers and was quite pleased with them. I also have a set of the Airhead BMW OEM replica mufflers and they are excellent, fit perfectly and look original. So, you might consider the header set that they sell. Not sure if anyone here has ever tried that set of headers.

You have to download their catalog to see the headers. The picture is so-so, but they look like the correct bend.
 

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First and most obvious, the man swinging that welder should be shot. Secondly your silencers are not mounted correctly. The mounting bracket on the silencer bolts behind the foot peg bracket. Thirdly the mounting bracket on the silencer has been bent out of shape to allow it to be mounted incorrectly. All the time the silencers are in the wrong place you can not expect the correct shape pipes to fit.
 

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First and most obvious, the man swinging that welder should be shot. Secondly your silencers are not mounted correctly. The mounting bracket on the silencer bolts behind the foot peg bracket. Thirdly the mounting bracket on the silencer has been bent out of shape to allow it to be mounted incorrectly. All the time the silencers are in the wrong place you can not expect the correct shape pipes to fit.
Good catch, Rod. The picture is so busy in that area that I never noticed that the bracket was on the wrong side of the peg bracket. And I agree, that would kick the muffler and the pipe out and is probably why his shifter is right over the header pipe.

The header on mine resides inboard of the shifter pedal. I'm home now and just went out to take a closer look to refresh my memory.
 

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Discussion Starter · #19 ·
First and most obvious, the man swinging that welder should be shot. Secondly your silencers are not mounted correctly. The mounting bracket on the silencer bolts behind the foot peg bracket. Thirdly the mounting bracket on the silencer has been bent out of shape to allow it to be mounted incorrectly. All the time the silencers are in the wrong place you can not expect the correct shape pipes to fit.
Well the head was that way whenI got it last year. It was the best later style head I could find that didn’t have the seats cut too deep by some shop doing a “valve job”. The welds are big, yes. I could have milled the excess down, but didn’t want to lose integrity and risk the insert pulling out.

Anyway, I’m pretty sure the silencer brackets are not bent. Maybe they are supposed to be? I’ve never paid much attention to them. I’m betting that if I had a good set of reproduction or NOS silencers and pipes that were bent correctly, they would fit as standard. If I were to hang the silencer on the inside of the bracket as it sat in the previous pic, the pipe rides against the transmission case and the foot peg.
 

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Ok, well at the risk of sounding condescending, when you say you don't think the brackets are bent, what are you using as a point of reference? For example, when I look at the picture of your silencer the threaded boss for one of the mounting bolts is clearly visible near the top of the silencer. When the correct parts are used that threaded boss is well out of sight on the back edge of the silencer. Therefore it seems safe to assume that either the brackets are incorrect or, they have been bent to mount the silencer in a different position. Either way, until the silencer is in the right place you will be unable to properly mount the pipes.
 
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