KTM RFS 450 EXC Jetting/Carb Help!

never.ride · 03-04-2010, 10:35 PM

Hi guys. I'm new to the whole carb thing after only having an FI BMW 800GS (I grew up on pedal bikes). I just picked up an '05 450 EXC that only has 22 hours on it. So, it obviously hasn't seen much use and it is running a bit rough. I've been told the needle may be a bit clogged up and the carb may need a general cleaning as it sat in a dusty place for awhile.

So, can you guys point me to some links as to how to get to the needle and/or cleaning the unit. Thanks in advance!!

GR0NK · 03-04-2010, 11:05 PM

If the carb has the stock needle and jets, I would suggest getting a JD jetting kit. Clean carb, install JD parts, ride.

Sean

jgreer · 03-05-2010, 09:34 AM

Quote:

Originally Posted by GR0NK

If the carb has the stock needle and jets, I would suggest getting a JD jetting kit. Clean carb, install JD parts, ride.

Sean

+1 on the JD jet kit. Really woke my 450 up

.

Blinkerfluid · 03-05-2010, 10:37 AM

Yea the JD kits are nice and easy.. Also go check out www.ktmtalk.com.. they have an entire section dedicated to jetting.. If the bike is running, just rough, you could try running a can of seafoam through it and see if that clears it up.

mt21 · 03-05-2010, 11:21 AM

Hi, anyone have a link with pics,to show how to do all this?, install JD kit, cleaning carb. etc.

barbwire44 · 03-06-2010, 05:48 AM

MT, if you buy a JD kit it will come with instructions, and pictures. You say runs a bit rough, that could be a lean condition, which pretty much points to factory jetting, or could be a rich condition, could be valves out of adjustment, although most of the KTMs tell/tale of needing a valve adjustment is hard starting, or could be bad gasoline, to low of octane, old gas etc..... I would find someone close to you to give a second opinion on what is going on before throwing money at problems we guess about on a message board, could be a simple as a turn of the fuel screw.

jgreer · 03-06-2010, 08:26 AM

Quote:

Originally Posted by mt21

Hi, anyone have a link with pics,to show how to do all this?, install JD kit, cleaning carb. etc.

The JD jet kit come with a complete instruction manual with pictures. It's very easy to install.

tobys · 03-06-2010, 08:49 AM

It was the single best upgrade I did for my 530. I'm a firm believer in JD.

never.ride · 03-14-2010, 01:36 PM

Hey guys. Got the kit installed and dialed in for the altitude here in Boulder, did a valve adjust, oil change and air filter and she is running sweet!

GR0NK · 03-14-2010, 04:11 PM

Quote:

Originally Posted by never.ride

Hey guys. Got the kit installed and dialed in for the altitude here in Boulder, did a valve adjust, oil change and air filter and she is running sweet!

Right awn bud.

Sean

03-04-2010, 10:35 PM	#1
never.ride ^OP Gnarly Adventurer Joined: Aug 2008 Location: The Boulder Bubble Oddometer: 315	KTM RFS 450 EXC Jetting/Carb Help! Hi guys. I'm new to the whole carb thing after only having an FI BMW 800GS (I grew up on pedal bikes). I just picked up an '05 450 EXC that only has 22 hours on it. So, it obviously hasn't seen much use and it is running a bit rough. I've been told the needle may be a bit clogged up and the carb may need a general cleaning as it sat in a dusty place for awhile. So, can you guys point me to some links as to how to get to the needle and/or cleaning the unit. Thanks in advance!!

03-04-2010, 11:05 PM	#2
GR0NK Got some screws loose! Joined: Sep 2006 Location: In the Valley of Bombs Oddometer: 1,366	If the carb has the stock needle and jets, I would suggest getting a JD jetting kit. Clean carb, install JD parts, ride. Sean __________________ Team Valley Bomb Squad 2010 P2D 3rd place 2012 Dacre Challenge 2nd place *Nullus Vereor ex Terra Incognita*

03-05-2010, 10:37 AM	#4
Blinkerfluid Beastly Adventurer Joined: Feb 2008 Location: Port Orchard WA Oddometer: 1,172	Yea the JD kits are nice and easy.. Also go check out www.ktmtalk.com.. they have an entire section dedicated to jetting.. If the bike is running, just rough, you could try running a can of seafoam through it and see if that clears it up. __________________ North American Tag-O-Rama Map! Come Play With Us, Forever and Ever

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03-05-2010, 11:21 AM	#5
mt21 Adventurer Joined: Sep 2008 Oddometer: 49	Hi, anyone have a link with pics,to show how to do all this?, install JD kit, cleaning carb. etc.

03-06-2010, 05:48 AM	#6
barbwire44 Gnarly Adventurer Joined: Aug 2009 Location: Ooooohio Oddometer: 111	MT, if you buy a JD kit it will come with instructions, and pictures. You say runs a bit rough, that could be a lean condition, which pretty much points to factory jetting, or could be a rich condition, could be valves out of adjustment, although most of the KTMs tell/tale of needing a valve adjustment is hard starting, or could be bad gasoline, to low of octane, old gas etc..... I would find someone close to you to give a second opinion on what is going on before throwing money at problems we guess about on a message board, could be a simple as a turn of the fuel screw.

03-06-2010, 08:49 AM	#8
tobys OCD Hobbiest Joined: May 2008 Location: Redmond, WA Oddometer: 321	It was the single best upgrade I did for my 530. I'm a firm believer in JD.

03-14-2010, 01:36 PM	#9
never.ride ^OP Gnarly Adventurer Joined: Aug 2008 Location: The Boulder Bubble Oddometer: 315	Hey guys. Got the kit installed and dialed in for the altitude here in Boulder, did a valve adjust, oil change and air filter and she is running sweet!