Hello all!

I am a proud owner of a 2013 XT660Z Tenere, and this is my first post, hope to find and share great info in this forum

Ok so my question is the following...I have a Dominator exaust on my Tenere, with the stock bdkiller that comes with it, which almost does not silence the motorbike.



I ordered their "Hard" dbkiller, and it does change the sound A LOT which is great for my commute days.

However, from looking at the exhaust dbkiller and the sound it delivers now, I see it is blocking immensely the air going out, could this cause any engines problem, or I can be relaxed about it?

The top one on this picture the hard DB killer, the photo does not shoe but the tube is blocked meaning air flow is only trough the tiny holes.



This video shows also the db killer in more detail:



Thank you very much for your help!!

Stock exhausts are relatively restrictive in order to pass emissions test etc..ANY after market exhaust will be less so as they all aim to allow the engine to breath easier.

Its all relative and imho an aftermarket exhaust,even with a decibel killer in it will be more freer flowing than stock.

Question:have you got aftermarket air filters and Kev's mods too?...

Welcome mate.

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Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

Wow, that is one tiny pass for all that air to go through.

I experienced very different problems with exhaust and DB killers when I come back to my R1 from 2005.
( I know its a different bike, but just to show you that it matters )

Went from bone stock to a catremover and aftermarket exhaust, it changed the power so bad that powerwheelies were hard to archieve.
got a PC3 and tuned it and it was running like a rocket.
Than I put the db killers in it that was blocking like yours. it had a hard time to ride properly when you took off at the traffic lights, just way to much pressure.

I modified my DB killer by drilling much more holes and the problem was solved! sound was way louder too.


What I would do if I were you: open up your exhaust by removing the popnails ( don't know if thats correct english ) and see if you can replace the Original 'sound reducing foam/cotton' ( if its allready there ) with better ones. When you have done that the standard DB killer should do his job just like the hard one. its a bit of work but well worth it

Why drill extra holes in a decibel killer,ie something that reduces the sound output, to make it breath easier and louder?..same for the silencer packing....

Because they made the killer so massive that it has less room than an 50cc scooter exhaust to put all the exhaust fumes through haha.

no really sometimes they don't put much 'sound reducing material' in the mufflers and go with the cheap solution to get it legal: ****ty db killers.