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T100 downswept exhaust pipes on a T100c
#794794 01/04/20 9:10 pm
Joined: Oct 2019
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DarrenJ Offline OP
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Hi lads,

My T100C has the high scrambler-style pipes fitted at the moment. I'm not a fan of them and I have to use a shorter kick start lever as a result. I have a new kickstart lever here ready to fit after I sort out exhaust pipes. I'm doing a top end rebuild at the moment so it won't be any easier to kick start it after the compression ratio is increased!

I would prefer not to go for the T100c style exhaust set up where an over and under pipe are fitted on the left hand side. What I'm looking to do is fit standard T100 header pipes and use my own silencers.

My header pipes are 1.5 inch wide where they fit onto the short pipe that's threaded into the exhaust port and 1 3/8 inches where they fit into the silencers.

Anyone else do something similar?

Any recommendations?

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Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794804 01/04/20 11:37 pm
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you want low pipes ?
it sounds like you have normal 500 spigots ?
so normal headers will just slip over .
there are low headers with balance crossover [Linked Image from northerneagle.ca]
and low headers without crossover [Linked Image from northerneagle.ca]
( of course verify inside and outside diameters with vendor before purchasing )
one manufacturer's specs :
Pipe diameter: 1+1/4" (32mm)
Cup/flare at head, diameter is 1+5/8" (41mm) to fit over port stub of 1+1/2"(38mm)
Cup/flare at silencer end, diameter is 1+1/2"(38mm)

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794806 01/04/20 11:56 pm
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DarrenJ Offline OP
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Yes, I'm looking to fit low pipes and I have normal spigots at the exhaust ports. All my measurements above are external diameters. The header pipe that's fitted at the moment is a 1 + 3/8" pipe. The cup at the exhaust port end is welded onto the pipe so I'd imagine this is a fairly standard item. The silencer pipe that attaches to the down pipe is 1 + 1/2" so it fits straight in and is held in place with a clamp.

So it sounds like it should be a fairly straight forward job!

I will be able to fit the correct kick starter lever then as there's a short 350cc one fitted as the current exhaust is preventing me from fitting it.

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794817 01/05/20 2:16 am
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What year is your bike? It appears to be a '69 or '70.

The last year for spigots and "slip-over" pipes was 1970.
!968 to 1970 pipes will fit, as the pipes' mounts that fasten the pipes to the brackets (that then bolt to the engine mounts) are the same.

Stay away from 1967 pipes, as the mounts on those were lower, and mounted the pipes to the frame itself. They are known to break.

And the MINIMUM OIL LEVEL decal on your oil tank is positioned too high.
About half-way down is the correct position.

From my own riding experiences with both a T100C and a T100R, I suggest you fit the bigger "R" front brake as well.

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794824 01/05/20 7:57 am
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Same bike as mine Darren and I went with low pipes. It's a common change for those that don't like cooked thighs.

Your exisiting silencers should fit, but you might need to fabricate hangers for them to drop them down from the inside of the pillion footrest mount.

Irish Swede is right in that '67 pipes are different.

I don't use a balance pipe on my bike. Just bought two down pipes to suit the single carb UK 500 from 68 to 70 and fitted it all up. I use a standard kick start. Not using the balance pipe system gives you a bit of wiggle room to get everything lined up around the footrests, kick start and rear pillion hangers.

Bike always ran well on this set up. No good off road though, so you will lose that option.

Last edited by Ginge; 01/05/20 7:58 am.

'51 C11 in a '54 C10L frame. Back on the road...
'70 Triumph Trophy 500. Next on the bench for a refresh!
'72 Triumph Tiger 650. Back on the road...
Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794830 01/05/20 8:48 am
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Just a couple of thoughts. My road Daytona is a 67 engine in a 70 T100S cycle which came to me with the original 18 inch front wheel with the 7 inch TLS front brake which worked very well indeed. I have since built a new 18 inch rim onto an 8 inch TLS drum but the original was great although the new one looks a little meaner. I have the 67 non balanced pipes that mount to the bottom engine mount and 33,000 more miles with those pipes that came on the bike and they are just fine. Careful stress free home made mounting brackets may have helped. If you have the shorter kicker I would think that it's an early one that was on the 67 500 while the later one ( 68 on ) is a little longer with a different bend. Starting with the shorter kicker has been no problem.

My 68 matching number Daytona that is becoming an ISDT replica has the two into one down to the right siamesed pipes as the mid 60's ISDT bikes were with a fabricated elbow from part of a B44 scrambles pipe and one of the smaller T100C mufflers on it. Nice and tidy and out of the way.

Still haven't finished the ISDT bike but will use either a 626 or a 928 on it. I use a 930 on the 67/70 Daytona/T100S and it works very well giving good performance and between 55 and 75 MPG depending on speed and one or two on board.

Do you have one high pipe on each side? It's hard to tell from the photo.

Good luck on the change.

Cheers, Wilf


"It's about the ride..."
Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794841 01/05/20 12:27 pm
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Thanks for the replies!

The bike is 1968 for sure. I know the tank badges are the later ones. I will fit the proper ones after I get it running well.

There's a pipe fitted each side. I think the T100 set up looks good and leaves plenty of room to work on the bike, compared to the factory set up.

The short kick starter is a right pain to use as the current exhaust set up gets in the way and I'm expecting more compression after a rebuild.

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794876 01/05/20 5:55 pm
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The twin leading shoe front brake on the initial bike posted was introduced mid year of the 1969 model year on the T100C bikes.

Also, the color scheme on the initial bike posted appears to be that of the 1971 model year bikes in the US.

Darren, have you checked the engine and frame number on your bike to verify 1968 model year?

Re: T100 downswept exhaust pipes on a T100c
fried okra #794882 01/05/20 7:21 pm
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I did indeed!

H64044 is the number on the engine. This seems to date to 68. The bike is an American import I was told by the previous owner. The TLS brake was a retrofit.

The colour scheme isn't identical to the 1971 scheme. There's a black detail each side of the tank on the correct scheme. The paint job on mine is a slightly 'custom' job. The bike originally had stainless steel mudguards and a black tank.

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794893 01/05/20 8:23 pm
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[Linked Image from live.staticflickr.com][url=https://flic.kr/p/29U24Zr]
These are the factory pipes for the C model, with shorty custom mufflers. The original mufflers were gigantic and overpowered the looks of the bike. However, there is a healthy bark to this exhaust....some might say too loud....
The bike runs well with this system, but you are pretty much guaranteed the occasional leg burn....
No interference with kickstart whatsoever.
A low pipe system would not look out of place on this model since really the only mods to make it a C model externally were to install the high pipes and put K70's on it. Otherwise I think there is lower gearing and one less instrument to look at.
Cheers,
Bill


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Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794965 01/06/20 12:08 pm
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T100 downpipes ordered from Armours exhausts. They double checked all the measurements over the phone so hoping they will fit !

Then I can fit my new longer kick start lever and no more 'hot thighs' or burned vintage Daytona boots!!

Re: T100 downswept exhaust pipes on a T100c
DarrenJ #794976 01/06/20 12:59 pm
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Let everyone know if they DON'T fit.


Moderated by  John Healy 

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