2017 ktm 350sxf ---puff of smoke

Related:
Create New Tag

Matt Barber

Vital MX member Matt Barber
57908 Matt Barber http://p.vitalmx.com/photos/users/57908/avatar/c50_IMG_4520_1496116730.jpg?1496116432 http://www.vitalmx.com/community/Matt-Barber,57908/all 05/29/17 7 6

Posts: 13

Joined: 5/29/2017

Location: Placerville, CA USA

10/5/2017 8:49 PM

So I started the bike cold and let it idle for 2 min and I heard the motor start to sound like it was struggling,,, I reved it a bit and it blew a huge plume of white smoke then it all cleared up real quick..... WTF was that? So I just rode it easy for a few laps and no issue.

Any body experience this ???

slipdog

Vital MX member slipdog
16124 slipdog http://p.vitalmx.com/photos/users/16124/avatar/c50_Screenshot_2017_11_10_at_4.28.33_AM_1510439790.jpg?1510438986 http://www.vitalmx.com/community/slipdog,16124/all 07/25/09 9 1 31 7130 53 9

Posts: 7161

Joined: 7/25/2009

Location: Nor Cal, CA USA

10/5/2017 9:40 PM

White smoke usually is from a coolant leak.

nage0139

Vital MX member nage0139
48062 nage0139 http://p.vitalmx.com/photos/users/48062/avatar/c50_IMAG0287_1436844772.jpg?1436843953 http://www.vitalmx.com/community/nage0139,48062/all 07/09/15 1 18 85

Posts: 103

Joined: 7/9/2015

Location: New Ulm, MN USA

10/5/2017 9:43 PM

My initial thought is that you may have sucked some air filter oil, but I've never actually seen or tested that theory. It could explain it all, but again, just a theory.

RCF

Vital MX member RCF
4784 RCF http://p.vitalmx.com/photos/users/4784/avatar/c50_0611171249_1_1502895901.jpg?1502895426 http://www.vitalmx.com/community/RCF,4784/all 04/01/08 13 88

Posts: 88

Joined: 4/1/2008

Location: PA, USA

10/6/2017 5:41 AM

Like mentioned above if you just put a clean air filter in that's probably the culprit , or you have a leaky valve seal which isn't a big deal as long as you're not leaving a trail of smoke behind the bike when you're riding I wouldn't worry about it.

CarlinoJoeVideo

Vital MX member CarlinoJoeVideo
41118 CarlinoJoeVideo http://p.vitalmx.com/photos/users/41118/avatar/c50_jessy1_1471467436.jpg?1471466703 http://www.vitalmx.com/community/CarlinoJoeVideo,41118/all 11/30/13 3 53 http://www.vitalmx.com/community/CarlinoJoeVideo,41118/setup 96 4067 44 5 1

Posts: 4163

Joined: 11/30/2013

Location: Portland/Los Angeles, CA USA

10/6/2017 6:44 AM

RCF wrote:

Like mentioned above if you just put a clean air filter in that's probably the culprit , or you have a leaky valve seal which isn't a big deal as long as you're not leaving a trail of smoke behind the bike when you're riding I wouldn't worry about it.

I had a valve seal start to go at about 80 hours on my 16 250f and it would smoke almost like a 2 stroke. Ran fine other than that but as stated above it was a constant smoke not just 1 puff.

Squirtlege

Vital MX member Squirtlege
51142 Squirtlege http://p.vitalmx.com/photos/users/51142/avatar/c50_23_1507133462.jpg?1507133421 http://www.vitalmx.com/community/Squirtlege,51142/all 02/23/16 1 101 1

Posts: 101

Joined: 2/23/2016

Location: Neptune Beach, FL USA

10/6/2017 8:12 AM
Edited Date/Time: 10/6/2017 8:12 AM

I've also had this happen from going too ham with the filter oil... usually a direct result of the amount of beers consumed prior to oiling my filter.

BobPA

Vital MX member BobPA
40845 BobPA http://p.vitalmx.com/photos/users/40845/avatar/c50_Engine.F_1455853935.jpg?1455853535 http://www.vitalmx.com/community/BobPA,40845/all 10/31/13 1 76 4931 8 1

Posts: 5007

Joined: 10/31/2013

Location: PA, USA

10/6/2017 9:25 AM

My 450 has done this a couple of times too. It acts like it loads up like a two stroke a bit, clean it out and it is good to go.....Only happens when I use the "choke"

Jason Anderson FTW

Matt Barber

Vital MX member Matt Barber
57908 Matt Barber http://p.vitalmx.com/photos/users/57908/avatar/c50_IMG_4520_1496116730.jpg?1496116432 http://www.vitalmx.com/community/Matt-Barber,57908/all 05/29/17 7 6

Posts: 13

Joined: 5/29/2017

Location: Placerville, CA USA

10/6/2017 9:30 AM

That's it... I just put in a new filter the night before.... and had a few beers

Thanks for the help

MotoMaverick989

Vital MX member MotoMaverick989
54605 MotoMaverick989 http://p.vitalmx.com/photos/users/54605/avatar/c50_435B3C98_C853_4180_83D6_8227F32F6BC1_1509321410.jpg?1509320873 http://www.vitalmx.com/community/MotoMaverick989,54605/all 10/16/16 1 55

Posts: 56

Joined: 10/16/2016

Location: WV, USA

10/6/2017 2:29 PM

White smoke can also be raw fuel. It’s what diesels do when an injector starts to have an issue and dumps a lot of fuel and the engine can’t even begin to burn it and the injector usually hangs open injecting on the other 3 strokes. Black smoke is the result of being overfueled but the engine can consume it. White is still in its raw vapor form and usually results in a hydro lock. Could’ve been a hiccup with the ignition or injector.

Squitlege

Vital MX member Squitlege
51141 Squitlege http://p.vitalmx.com/photos/users/51141/avatar/c50_IMG_1754_1507156050.jpg?1507155208 http://www.vitalmx.com/community/Squitlege,51141/all 02/23/16 1 75

Posts: 76

Joined: 2/23/2016

Location: Jacksonville Beach, FL USA

10/6/2017 2:31 PM

Matt Barber wrote:

That's it... I just put in a new filter the night before.... and had a few beers

Thanks for the help

I wasn't trying to be a smartass. It could be a bunch of things. Was just relaying my personal experience.

BobPA

Vital MX member BobPA
40845 BobPA http://p.vitalmx.com/photos/users/40845/avatar/c50_Engine.F_1455853935.jpg?1455853535 http://www.vitalmx.com/community/BobPA,40845/all 10/31/13 1 76 4931 8 1

Posts: 5007

Joined: 10/31/2013

Location: PA, USA

10/6/2017 6:29 PM

I should add that mine only did this on colder mornings where I had to crank the bike over slow a few times to warm the battery up.

Jason Anderson FTW

Squitlege

Vital MX member Squitlege
51141 Squitlege http://p.vitalmx.com/photos/users/51141/avatar/c50_IMG_1754_1507156050.jpg?1507155208 http://www.vitalmx.com/community/Squitlege,51141/all 02/23/16 1 75

Posts: 76

Joined: 2/23/2016

Location: Jacksonville Beach, FL USA

10/7/2017 12:19 PM

BobPA wrote:

I should add that mine only did this on colder mornings where I had to crank the bike over slow a few times to warm the battery up.

Shoulda poured more beer on it bob