Question about 2001 KTM 640 Duke 2

1 Answer

Is there an aftermarket exhaust for this bike?

Posted by on


1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has answered 1,000 questions.

  • Master
  • 1,689 Answers

Try to go for white brothers or FMF for 450cc up

Posted on Jul 16, 2009


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What are some of the factors I need to consider when buying an aftermarket exhaust system.

There is always a danger in tuning an engine without the right expertise behind it.The first thing you need to consider when replacing a motorcycle exhaust system is its design. It has to fit and attach to your motorcycle properly and easily. It is not supposed to exceed the capabilities of the previous stock exhaust system. The aftermarket system should also suit the bike's physical and technical specifications. If you need any more advice you can visit Motorcycle Exhausts and talk to the experts.

Apr 02, 2013 | Motorcycles

2 Answers

Dear Expert I have a 2009 magwheeels TVS Star City. there is a persistant Misfiring when the bike slows down & the bike ***** loudly :). Kindly advice at the earliest.

Is it a misfire or a popping out if the exhaust?

If its a popping from the exhaust was an aftermarket slip on or full system installed?
A popping exhaust would happen when there are leaks in the system.

If its under warrenty then you should have it checked by the dealer.

Aug 24, 2011 | 2011 TVS Star City

1 Answer

I have a 2001 FLSTFI,the bike is popping thru the exhaust during deceleration and stutters and it will cough thru the air cleaner while I am at any speed and any gear.

Check for intake leaks and exhaust leaks, this is the most common problem on these bikes. If you have aftermarket pipes the "popping" will be more distinct. Put on some gloves and cover the exhaust outlets and listen for a hissing from the pipes and around the cylinders.
Good luck, i hope this helps.

Jun 28, 2011 | 2001 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

My 2002 yamaha v-star 1100 classic is backfireing how do i fix. do i need to jet the carbs if so how????

Is the bike backfiring from the exhaust or the carburetor? Does the bike have stock or aftermarket exhaust?

Sep 28, 2010 | 2001 Yamaha V Star 1100 Classic

1 Answer

My honda shadow sabre the pipes trun blue

Motorcycles come standard with double wall pipes. The inner pipe turns blue and the outer chrome pipe stays nice. In a stock exhaust system you rarely get blued pipes. Unless, you put on your choke, start your bike, answer the phone, and forget your bike is running (or you start driving and just forget to turn off your choke.). Then you will blue your double wall pipe. Bluing is generally caused by too rich of a mixture or fuel burning in the exhaust pipe. If you put on an aftermarket pipe(usually single wall construction) and did not coat the inside of the muffler pipe, the pipe will generally blue the first time you drive the cycle. An old dealer trick is to replace blued aftermarket pipes with new aftermarket pipes (makes the bike look great on the showroom floor). Again if they don't coat the inside of the pipe with exhaust paint or a special coatings usually about $35 the pipes will blue before the customer gets home. If the bluing is mild you could try a product called" Blue Away"that might help, but should not be used regularly as it takes off a little bit of the chrome each time.

Jun 06, 2010 | 2001 Honda VT 1100 C2 Shadow Sabre

1 Answer

I have a Harley FXST 1990 and an exhaust mounting bracket

If you're talking about the muffler bracket back near the swingarm, these brackets are not that expensive and are available from either a dealer or aftermarket. V-Twin carries aftermarket parts for your bike. You can find the parts and order them online. I have no idea as to where you could get dimensions for the standard bracket.

Jan 13, 2010 | Harley Davidson FXSTS Springer Softail...

1 Answer

On Yamaha wr450 dirt bike the exhaust pipe gets red hot after only 30 to 60 seconds.

Sounds like you are running waaayyy too lean. Aftermarket intake/air filter/exhaust?

Apr 19, 2009 | 2005 Yamaha WR 450 F 2-trac

1 Answer


wait rivits? what? those kinda hold the exhaust together last I checked. The REAL way to get more performance is to either get a faster bike or buy an aftermarket exhaust. And get it tuned to match. And get good tires. And make sure your suspension is up to snuff and setup for your weight and riding style. And then you can change the intake though that could be done with the exhaust. Maybe a quick turn throttle, though don't buy a kit, use a zip tie. Or 2.,,,

Nov 10, 2008 | 2003 HM CRE 450 F

2 Answers

Exhaust systems

must the exhaust be specific to the model is there no way to take an exhaust made for a similar scoot and fit it to the scarabeo? What is your goal? The scooter exhausts offered by Leo Vince and Malossi aren't actual performance systems. People use them because they want to customize the scoot or get more of a growl sound while also passing emission inspections. Most people in the USA never have an emissions inspection on their scooters and are thus free to bolt on any exhaust they choose. If you are looking for performance you need an aftermarket free-flow system like those used for off-road bikes and your only limitation is how loud of an exhaust you are willing to accept. There are plenty of aftermarket exhausts for pit bikes and small dirt bikes that should bolt on to the S100-4T. Personally I would start by looking at mods people have done on the Honda XR70 since it's about the same size engine and uses the same 20mm Keihin carburetor. Of course if you bolt-on an aftemarket free-flow dirt-bike exhaust you will need to replace the existing restrictive airbox with a free-flow K&N unit and either add larger jets to the existing carburetor or switch to the high-flow 20mm PE Keihin or the 24mm Keihin. Either way, the muffler is the easy part it's getting the fuel/air mix right and that's all carburetor work. ,,,

Nov 10, 2008 | 2006 Aprilia Scarabeo 125

Not finding what you are looking for?
2001 KTM 640 Duke 2 Logo

Related Topics:

185 people viewed this question

Ask a Question

Usually answered in minutes!

Top KTM Experts


Level 3 Expert

79865 Answers


Level 2 Expert

342 Answers

Steve Banks

Level 2 Expert

232 Answers

Are you a KTM Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides