Triumph T140E - Exhaust Balance Pipe Modification - Now Runs Pukka 

A touch of the Alan Millyard engineering in this vid, good job

P/S, the reason the link pipe was fitted in the first place, was due to the extreme restriction of gasses in trying to make less noise. So by joining both down pipes together, they inceased the volume or space to allow a little more room for expansion. Without that mod, the pore motor would not be able to breath, or exhale. Also try fitting thous stifeling silencers on strate through down pipes, & your bike just will not run properly! The Triumph engine runs best, with strate throughs, or to keep on the right side of the law, use the old reverse cone 'aloy' megaphones. Your Triumph will love you for it.🇬🇧👌

Top tips mate, going to do that with my T140

Having just watched you, I just did this to my own Bonnie, and she sounds great, runs better, thanks!

Clever mod! I managed to source new pipes for a bargain but probably would have done this had I known. 👍🏻

A really odd problem, with a simple solution that has cured it, great. With the original large restrictive silencers the balance pipe helps breathing, and quietens the bike down as each cylinder breaths through two silencers. So is your bike a little louder with the balance pipe blocked up and pea shooters fitted, compared to an unblocked pipe with the pea shooter silencers? Not that the pea shooters offer much in the way of silencing anyway, they just sound great. The balance pipe also helps prevent the push in type exhaust pipes from popping out of the cylinder head. I have seen some replacement exhaust pipes without the balance pipe that still have a tie bar in its place, to help keep the push in pipes in the head. I've had three Triumph T140's over the years, and really like them. I had a very low mileage 1979 T140 in 1983, factory fitted with Lucas Rita electronic ignition and Amal MK2 carbs, plus those large restrictive original silencers. The MK2 Amals worked without trouble, always with a reliable steady tick over, but with just a slight hesitation when quickly opened up from a standstill for a quick getaway. So I bought and fitted a new pair of those Norton pea shooters, made by Campbells, and the original exhaust pipes still had the balance pipe fitted, and no re jetting of the carbs. The bike ran really well, with better throttle response and a livelier performance, plus a glorious roar when wound up......happy memories. Anyway, it just shows how individual examples of the same bike, with the same setup, can still behave so differently. Although mine was a very low mileage bike, and petrol was a bit different way back in 1983.

Clever fix and impressive self discipline in postponing test ride! 😅

Common misconception is that those silencers are peashooters. They are Norton style reverse cone megas. Peashooters are the older triumph and BSA type silencers with the tail pipe.

when I had my T140E with Toga peashooters, I changed jets and plugs and carb slides to ones with a different cut away. this was over 30 years ago so can't remember any details like numbers etc.

Look how much carbon came out when you test fit the slug i wouldve gone full length up to the clamp slots to help stop carbon building up luckily my pipes are straight through no cross pipe mines a 76 tho

It looks like the balance pipe was to thick, you have left a little cave of air volume on one side, I wonder if your get decel pop ,interesting vlog man✌☘

I have stated this before on RU-vid, 'Balace pipes' screw up the natural flow! You only need to see any race engine, & the pipes always have a very smooth flow.

People don't understand the function of the balance pipe.

So you have that tube that links the carbs blocked off as well as the crossover pipe? It's crazy how much of a difference the exhaust can make. I got a beat up old T140 recently. With the aftermarket mufflers it had on it, the bike was really loud and popping when I'd let off the gas no matter how I tuned the carbs. I put some stock style mufflers on it and it's a whole different bike. It sounds way better and there's no popping at all, not even durning deceleration. It's so much nicer to ride now. I have bikes that pop a little on decal, but not like this T140 was doing. My neighbors were not fans.

Got one! … but that exhaust ‘push fit to head’ arrangement (as if Meriden could do tolerances) with the little fin collar for ( it would seem) ornamental function only seems like crap engineering! My T140 is very pretty .. but i am reluctantly going to chop it in for a Honda ( appreciate reliability). will keep the BMW! No surprise to me we lost the market.

Great mod! I would of placed 2 plugs , one on each side with them cut at an agle to match the main pipe. You might get a bit better flow??

I actually machined down two short pieces of roundstock and drove them instead into the crossover ends on the exhaust pipes- same deal really but I didn't want a jagged exhaust path down inside the exhaust pipes. Also fitted some Norton Commando style peashooters which suit the bonny really well don't they?

Had 7 bikes over last 30 years always had those pipes on never had a problem nor any my mates I reckon its to do your crank it's certainly not pipe though your quick fix nay seem to initially cover this it won't your heading completely fucked engine I'd strip it down quickly

Was wondering what your initial issue was with the bike?. I purchased a 1973 OIF T120 with a T140 top end. Lovely bike and runs perfectly with a bit of throttle, but sounds odd on (uneven) tick over and tends to run rough at low speed. Throttle open and it sounds and runs superb, not so at lower speed. Carbs have been checked, ignition replaced with electronic, timing checked, all spot on. Currently running “ cigar” silencers and looking to replace with pea shooters. Would really appreciate any suggestions with regards to your experience with your own bike. Cheers, Karl.

the rubber balance pipe underneath have u blocked that off was wondering weather to do that on my t140d

Why do you need back pressure on a four stroke?

why do this?

Norton silencers are for Nortons.