Author Topic: Smoke on startup? (Read 5212 times)

stelt · « **on:** March 30, 2013, 01:12:40 PM »

Hi All,

My 2008 C14 emits a small puff of oil smoke if I rev it when cold only...when it warms up after 30 seconds or so nothing...just wondering if anyone else has seen this? It only happens if I snap open the throttle when bike is just started...ask my six year old how I figured that out..or she did...

maxtog · « **Reply #1 on:** March 30, 2013, 01:46:04 PM »

Quote from: stelt on March 30, 2013, 01:12:40 PM

My 2008 C14 emits a small puff of oil smoke if I rev it when cold only...when it warms up after 30 seconds or so nothing...just wondering if anyone else has seen this? It only happens if I snap open the throttle when bike is just started...ask my six year old how I figured that out..or she did...

Are you sure it is not unburned fuel "smoke", which is more likely? What does it smell like?

Pokey · « **Reply #2 on:** March 30, 2013, 04:28:16 PM »

Water vapor.....and NEVER snap open your throttle when first started and engine is warming up.

connie1 · « **Reply #3 on:** March 30, 2013, 04:56:52 PM »

"Hey Doc, it hurts when I do this".

"Then don't do that!"

RandyN · « **Reply #4 on:** March 30, 2013, 07:57:37 PM »

Sounds like worn valve seals, maybe? Definitely let the motor warm a bit before revving it.

maxtog · « **Reply #5 on:** March 30, 2013, 08:48:41 PM »

Quote from: Pokey on March 30, 2013, 04:28:16 PM

NEVER snap open your throttle when first started and engine is warming up.

+1

There is really no reason to open the throttle when it is not in gear, anyway.

stelt · « **Reply #6 on:** March 30, 2013, 09:54:53 PM »

Yup definately not unburned fuel smoke..thanks for the input guys..i normally let the bike warm up before revving it...it was a case of 6 year old wanting to sit on daddy's bike...me deciding to let her start it....and voila she turned the throttle grip when she turned the handle bars...instant puff o smoke...lesson learned...get her own bike....!

Cuda · « **Reply #7 on:** March 30, 2013, 10:02:42 PM »

OUCH
http://youtu.be/XZxzJGgox_E

Pokey · « **Reply #8 on:** March 31, 2013, 11:56:44 AM »

Quote from: stelt on March 30, 2013, 09:54:53 PM

Yup definately not unburned fuel smoke..thanks for the input guys..i normally let the bike warm up before revving it...it was a case of 6 year old wanting to sit on daddy's bike...me deciding to let her start it....and voila she turned the throttle grip when she turned the handle bars...instant puff o smoke...lesson learned...get her own bike....!

What if she or you had accidentally hit the gear shift?

stelt · « **Reply #9 on:** March 31, 2013, 07:47:45 PM »

KiPass would have sensed this and prevented damage...

twowheeladdict · « **Reply #10 on:** March 31, 2013, 07:56:50 PM »

Quote from: Pokey on March 30, 2013, 04:28:16 PM

Water vapor.....and NEVER snap open your throttle when first started and engine is warming up.

I cringe when I hear folks do that.

Conrad · « **Reply #11 on:** April 03, 2013, 04:49:55 AM »

Quote from: Cuda on March 30, 2013, 10:02:42 PM

OUCH
http://youtu.be/XZxzJGgox_E

Boomer · « **Reply #12 on:** April 04, 2013, 07:25:31 AM »

While she's warming up you will get a lot of steam out of the muffler.
This is because the Catalyser hasn't got up to temperature yet.
Once up to temp the steam is hot enough that you can't see it.
Water is one of the main byproducts from burning gasoline.
With a Cat at operating temperature the exhaust is almost entirely N2, CO2, H2O and a little O2.
Before it gets hot enough the bike will also be putting out all kinds of Nitrates, Nitrics, CO, and unburnt hydrocarbon nasties.

That said my C10 "smokes" when warming up too, but that's normally because I only start it once or twice a month so it's probably condensation in the mufflers.

stelt · « **Reply #13 on:** April 04, 2013, 07:06:37 PM »

Not to beat this to death...but it was smoke....thanks all for the input...

stevewfl · « **Reply #14 on:** April 04, 2013, 08:09:58 PM »

Quote from: stelt on March 31, 2013, 07:47:45 PM

KiPass would have sensed this and prevented damage...

^^^^

Conrad · « **Reply #15 on:** April 05, 2013, 04:27:43 AM »

Quote from: stelt on April 04, 2013, 07:06:37 PM

Not to beat this to death...but it was smoke....thanks all for the input...

How did you determine that and what's to be done about it now?

stelt · « **Reply #16 on:** August 19, 2013, 03:04:07 PM »

leaking again lightly....Cam Sensor Oring replaced!

KawiG · « **Reply #17 on:** August 19, 2013, 04:16:36 PM »

usually before startup

stelt · « **Reply #18 on:** August 19, 2013, 06:58:24 PM »

Lost track of my thread...different problem here..smoking from underneath dash...fixed now..

2talltim · « **Reply #19 on:** August 20, 2013, 07:25:09 PM »

yup mine does this too, going to do the o-ring this winter during tear down for the valve check

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Author Topic: Smoke on startup? (Read 5212 times)