The 2006 KTM 640 Adventure Build
- Thread starter MuddyMudskipper
- Start date
MuddyMudskipper
Camp Ninja
Part III
Part III: Exhaust
The 640 comes with a 50 State compliant exhaust system manufactured by SuperTrapp. It is a decent exhaust but it is heavy and very restrictive with all of the associated emissions equipment. The power of the bike was also a little flat in my opinion and after doing a little research I was able to determine that changing the silencer and re-jetting the bike would "liven" the bike up a bit.
When I brought my bike in for the first service to the dealer I inquired about exhaust for my bike. Coincidentally the dealer had just installed an Akrapovic titanium slip-on exhaust and a re-jet on another customer's bike and highly recommended the same set-up. I had the dealer order the parts up and do the work since the 640 was in the shop anyways. I am very pleased with the exhaust and jetting mods that were done to my bike.
The Akrapovic
The The Akrapovic silencer is a very nice part and 60%, or about five pounds lighter than the factory SuperTrapp. The Akrapovic also has a removable silencer for when you want to wake the neighbors.
According to the db test on ADV Rider the stock SuperTrapp exhaust tests at 90db @ 4250 RPM and 96db @ 6000 RPM. The Akrapovic tests at 98db @ 4250 and 102db @ 6000 RPM. For reference, the Hella Super Tone Dual horns belt out and advertised 118 db’s. Without the silencer the bike is LOUD under load but quiet (enough) when you’re just cruising.
The SuperTrapp
The rangers and police have left me alone because the 640 isn’t a dirt only bike and I doubt they’d notice any of the emissions stuff missing. I did keep the factory SuperTrapp for the places where I know the rangers will check for spark arrestors and db since it is very easy to swap the exhaust pipes out.
Akrapovic LC4 Titanium Slip-on Exhaust Part Number: 57305079400
Part III: Exhaust
The 640 comes with a 50 State compliant exhaust system manufactured by SuperTrapp. It is a decent exhaust but it is heavy and very restrictive with all of the associated emissions equipment. The power of the bike was also a little flat in my opinion and after doing a little research I was able to determine that changing the silencer and re-jetting the bike would "liven" the bike up a bit.
When I brought my bike in for the first service to the dealer I inquired about exhaust for my bike. Coincidentally the dealer had just installed an Akrapovic titanium slip-on exhaust and a re-jet on another customer's bike and highly recommended the same set-up. I had the dealer order the parts up and do the work since the 640 was in the shop anyways. I am very pleased with the exhaust and jetting mods that were done to my bike.
The Akrapovic
The The Akrapovic silencer is a very nice part and 60%, or about five pounds lighter than the factory SuperTrapp. The Akrapovic also has a removable silencer for when you want to wake the neighbors.
According to the db test on ADV Rider the stock SuperTrapp exhaust tests at 90db @ 4250 RPM and 96db @ 6000 RPM. The Akrapovic tests at 98db @ 4250 and 102db @ 6000 RPM. For reference, the Hella Super Tone Dual horns belt out and advertised 118 db’s. Without the silencer the bike is LOUD under load but quiet (enough) when you’re just cruising.
The SuperTrapp
The rangers and police have left me alone because the 640 isn’t a dirt only bike and I doubt they’d notice any of the emissions stuff missing. I did keep the factory SuperTrapp for the places where I know the rangers will check for spark arrestors and db since it is very easy to swap the exhaust pipes out.
Akrapovic LC4 Titanium Slip-on Exhaust Part Number: 57305079400
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