[Lui Varney]

Hey all, 250rr abs 2012. There's a little smoke coming from the exhaust, is this a cause for concern?

 

[jkv357]

Image won't open for me, but if it's during warm-up it's not uncommon. Moisture from combustion is in the exhaust system and is turning to steam as the system heats up.

One way to confirm it's not a problem is to keep an eye of the coolant level. If it's getting into the combustion chamber the level is going to drop. Also keep an eye on the oil for any signs of leaking coolant raising the level or making it milky-looking (after it's fully warm).

If it were smoke from engine oil you would see the oil level drop quickly.

 

[Lui Varney]

https://youtu.be/SUpYHqX5qn0

Here's a 15 sec video of it.

 

[jkv357]

That just looks like oil (or something) burning off of the pipe to me.

If it's oil I'd find the leak. The CBR doesn't hold much and you don't want to run low.

 

[Lui Varney]

I gave the little ring on the exhaust a wipe with wd40, its been a few days now, so I'll try wipe off any surface spray there would be and baby it for a while to see what's going down. I'll try to report back tonight to confidently close the thread.

Thanks for the insights

 

[RodgerMillan]

Here's a 15 sec video of it.

 

[DannoXYZ]

Heh, heh... they may have fixed it in past 4-yrs.

Here's perfectly normal smoke from my exhaust on cold days. Extra rich mixture along with condensated water in crankcase generates some steam on initial start-up. It goes away after 5-minutes after engine's warmed up and choke turned off.