Morning all,

I need some help please, regarding exhausts(Xt660Z). My perceptions are.

1) stock pipes are heavy and have catalytic converter in them.
2) Slip on pipes like LV have no catalytic converter and sound better and aid performance to a degree.

As part of my performance upgrades I am looking at LV double pipes slip-ons, and then KEv's O2 and fuel mod.

?? what if any are the benefits of changing the exhaust, apart from looking better and sounding better on the bike 8-)

Thanks

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I've done the fuel mod and the 02 controller and have a set of twin LV pipes and couldn't be happier with the result...

I initially swapped out my standard pipe for a MTC single but it was too loud as I leave home early sometimes..

The LV twin gives a lovely deep motorbike burble but is quiet enough for me to start in the mornings, if I took the DB killers out that would be a different story.

I hated the muted sound of the standard box as it just didn't sound like a Thumper at all, sounded like a GIANT VESPA....

It's twice the bike it is in standard form but that is ALL down to Kev's mods...I may have gained a little from the pipe but nothing I could register.

The bike pulls smoother than it did with the MTC on..

I say you have made a good choice.

I see you are in Kent, let me know if you want to come and check it out in person.

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KNOWLEDGE IS POWER BUT COMMON SENSE IS KING

Quite a few Ten owners have removed the standard exhaust, cut it open removed the catalytic converter, drilled the pipes and then put it back.

I got one already done from someone on here, but if you can find a local stainless exhaust place, I'm sure someone there will do it for you for less than 50 quid.

The result is a louder pipe but only when revving, free-er gas flow, and about half a kilo lighter.

I could pop down with gibbo and we could all compare.. exhaust...

Ps: do the two kev mods first. Best money you can spend on your Ten

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Bike: 2013 XT660Z, TKC70 tyres

Mods:
Barkbusters, Scottoiler, DIY Tail Mod, DNA Stage 3, Power Commander V & O2 Eliminator, Exan X-Black Stainless exhaust, Tool tube, Ohlins linear front fork springs, Nitron rear shock, JT front and Supersprox rear sprockets, D.I.D. VX 520 chain, Adventure Spec bashplate, DIY USB Outlet, DIY chain guide, Kev's Throttle mod

http://www.facebook.com/onemooseonemotorbike

Thanks guys, sounds like it is the way to go.
I think removing the stock pipes is best, as I could put them back if needed.
Gibbo1974, I might just take you up on your offer and pop by over a weekend to see for myself, I am just down near Faversham , I think I have seen pictures of you bike on the forum, but seeing and hearing the real thing will be better. Can I PM you in the week ???

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Of course mate, let me know when you can make it and I will get the kettle on...

I've got a few days away this week but am generally always in after working hours....

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KNOWLEDGE IS POWER BUT COMMON SENSE IS KING

PM sent.

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Weight
Stock silencer is heavy, about 7Kg. Most aluminium (LV) and titanium (Akrapovic) twin silencer aftermarket systems come in at 5-6Kg and the stainless ones are 6-7Kg, so not as much of a weight saving as you’d imagine.

Single silencer system can dramatically save weight, even in stainless. An MTC stainless can is about 2.2Kg. Go for a titanium or aluminium one and its even lighter still, my Exan weighs 1.2Kg, even with link pipe and all the clamps and mounting gubbins only weighs 1.65Kg.

Fitting a single silencer not only saves weight, but frees up potentially a lot of extra space for fixed storage which we all know the T�n�r� is lacks, such as a tool tube.

Cats
Be careful, some twin slip-on systems have cats, such as the accessory Akrapovic. Almost all of the available twin systems can be supplied with or without cats to satisfy German TUV. So you’ll need to watch that if buying second hand.

As WeaveMcQuilt says, quite satisfactory results can be obtained by removing the cat from the stock silencer, both in terms of sound, fuel economy and performance.

Noise
Generally, as Gibbo has found out, a single silencer is going to be harder to silence than a twin. It is possible to get a quiet single-sider, but the can needs to be adapted to single use. I think one of the problems with the MTC single having a reputation for being loud is that it is exactly the same can as they supply with the twin silencer setup. A specifically designed can for use on its own will be better in this respect.

Performance
In basic exhaust tuning physics, a single can will lower the engine speed where peak torque is made and a twin will push it up the rev range. One setup is not really any better than the other in terms of power, the different setups just shift what power there is up or down slightly. There’s only about 500rpm difference, which will be hard to notice on the road.

Exhaust tuning is not that critical on single cylinder engines, so don’t expect much of a power gain if any at all. On a multi-cylinder bike tuning of the exhaust, headers and manifold particularly can make a massive difference.

TBH, as has been mentioned already, the biggest single improvement you can make to a totally stock T�n�r� is by fitting an O2 controller; throttle response and low down tractability will be improved beyond recognition. After that, intake improvements (air filter/snorkel removal/DNA stage1-2-3 etc.) and a Kev fuelling mod (or PC) will further increase smoothness and drivability, as well as give improved power higher up the rev range.

Of all the possible mods mentioned, changing the exhaust is the most expensive by far (excepting a PC5) and will offer the least improvements in power and drivability.

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Thanks Pleiades, as always lots to think about.
I guess it does point to O2 controller first, then filters and fuel mod.
I like the can you have put on your bike. It does look like exhausts are the last thing to modify from what I can gauge here. Kev will be getting a order soon.

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