exspansion pipe (opinions)

[jpderv]

hi folks just bought myself a ts50x lovely we bike only problem so far is that it has a small hole in the exspansion pipe so rather than weld it up im using it as an excuse to get a new exhaust.

so far i can only find two people that make exhausts for them Giannelli and Big one i was wondering what was the better one of the two or does it matter what make you get do all exspansion pipes offer the same performance gains?

one things for sure the prices are very different the giannelli is 90 and the big one is 160 any opinions welcome.

[Frost]

Yup expansion chamber can make a difference, but not a massive one. The standard ones are fairly well designed, they're just heavy. The main performance increase will come from swapping the silence to something less restrictive.

[jpderv]

good to know in that case il go for the cheaper gannelli one then it actually looks better than the big one aswell

[Teflon-Mike]

Big one tend to have a better quality of finish & a reported to last longer, particularly the full chrome systems. Gianelli are black painted, & have a reputation for loosing thier finish fast and not lasting as long.

For the gains, if your existing pipe can be welded, save your dosh, get the old pipe welded & put the saving towards a bigger bike.

At BEST a replacement pipe will give maybe 5% more power top end, usually sacrificing mid-range to get it.

On a moped, given that they are restricted to begin with, you MIGHT get a wopping 15% more power, if you re-jet the carb to suit the new pipe and adjust the ignition advance or swap the CDI unit to suit the new pipe.

If the pipe doesn't come with reccomendations for those added mods, then either it is likely to wreck your engine, or its not going to offer an actual power gain..... I'll let you decide which is the more likely.

But lets say that for some peculiar reason, either pipe will defy the principles of conventional tuning and offer a genuine 'big' gain of around 15% power boost (about three tiumes whats typically achievable, and then only with associated carb & ignition mods) on a 3.5bhp engine, thats a less than half a horse power more.....

Seriousely you'd get a bigger kick in the pants from the after effects of a cheap curry!

SAVE YOUR MONEY
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[jpderv]

sound advice there mike never really looked into it much to be honest i just assumed that them kind of exhausts would offer an amediate gain but by the sounds of it the money would be better spent else where a gym membership perhaps lol would see better gains.

thanks for the advice anyway.

[Kickstart]

Hi

An expansion chamber can give a good power increase if the current one is poor. Or more likely if the current one is restricted.

I do not know with the TS50 whether there is a restrictor in the exhaust though, or if the restriction to keep it down to about 30mph is elsewhere.

All the best

Keith
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[jpderv]

Well my ts50 seems to go ok even with the hole in the exhaust it will top out at around 45mph on the flat there is only 2k miles on it though so the engine is fairly fresh wasnt really looking for4 a big hike in performance i just thought it would be better to get a performance exhaust for similar money to the standard one thats all

[Kickstart]

Hi

I have sympathy with your motives, but check carefully how well made the replacement is. Years ago a friend had a Gianelli exhaust on his MBX125. It took about 6 months from new for it to rust through. On a 2 stroke that takes dedication to lousy metal.

All the best

Keith
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[mr rip]

the ts50x pipe is about the most restrictive part on the bike

but it's a very effective expansion pipe when it's de-restricted, which isn't hard to do if you can weld & worth having a go at befor you splash out on an after market pipe,

(note) the last time I bought one, the gianelli pipes had a different sized stinger pipe so you can't mach up either half of the original pipe with it but have to get the complete gianelli system

if you have the pipe off the bike, have a look at it from the back/inside edge, as the pipe tapers down toward the stinger you will see two vertical rows of spot welds

cut the pipe between these two rows & you will see a flat plate with a hole in in eace half (a large hole engine side, & a small hole nearer the stinger)

I've tried several different variations of knocking these plates out from one or the other or both, but I got the best result from leaving them both in situe & get a 5mm drll & drill loads of holes in both plates so they both look like cullanders (the more holes the better) then weld it back together,

you will want to do away with the old steel reed valve in favour of something a little more flexable, & upjet to suit, you might have to raise the slide needle a notch too, but you will notice a big difference
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[jpderv]

im sorry mate but i have no ide what a stinger pipe is lol i had the exhaust off i looked down the end that was connected to the engine there was nothing inside there i looked in the end that was connected to the scilencer and there was nothing in there either i thought there would be a washer in there or something

[Blue_SV650S]

Do Fresco not still make pipes? - it was them and Geinelli when I were a lad!!

I had a TS50X and the exhaust is the best place to start, as stated above, you can de-restrict the stock one and it makes for a good pipe!

EDIT: {click click} ... 'Big one' is Fresco's new name ... as you were chaps!!
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[jpderv]

ha ha yeah i was thinking on the bigone until i found out the price then i saw the ginnelli pipe thats half the price so thats probly the one il end up going for.

ive had the standard pipe off the bike and cant see any restrictions in it.

[jpderv]

ooo of topic i know but how do you get a pic in your avatar

[c_dug]

IIRC you need to cut the pipe open to remove the restriction, hence needing to have access to a welder or welding gear.

You can add an avatar by going in to your profile (top right of your screen beside your username) it is at the bottom I think.
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[mr rip]

the stinger is the pipe the silencer fits onto

if you look at the back edge of the exhaust just behind the mounting bracket you should see the two rows of spot welds that hold the restriction washers in place

you can't see them by looking down the pipe
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[stevo as b4]

Fresco is Big One now.

I always heard that the TSX50 was like the DT50 and MT5 in that the whole engine was designed to produce around 3bhp as std, and that unlike modern race rep 50's and sporty twist and go's, that there is not any one thing that is the restrictor and that can be removed to get a big power gain.

In short there is no cheap, simple or easy mods to do to get much more power or speed from the bike. The TS100ER engine might go in or even a TS125 engine, which would be a massive amount better than any tuning you could do to a 49cc engine IMO.