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I see smoke when I blip the throttle

10 posts Started 29 Dec 2009 Last recovered post 29 Dec 2009 Wayback Machine snapshot 12 Apr 2010

#1
After my little get off, while my shoulder was healing I decided it was about time to get my valves...I had the body work off and i couldn't ride anyway. The valve check took much longer than expected, due to being busy doing other things, and shipping time for various parts and pieces.

I finally buttoned the bike back up on the 23rd, but it has been too cold to ride. I did however warm it up in the garage on the center stand so i could burp the cooling system (new fluid with the valve check). The old fluid had looked good still, but I had drained most of it when I moved the radiators out of the way. When I started the bike, and it started up very easily (just had to prime the lines as I had replaced the tank/fuel pump etc), I noticed it was smoking...but I couldn't tell if it was smoke or just the cold air...plus I had spilled some coolant on the headers and they smoked a bit.

A couple days later I fired it up again, and I noticed when I blipped the throttle (not up to temp fully) that there was again smoke in the exhaust. Color was light, not dark, but I couldn't say if it was blue or grey. Is it possible to have missed something, or done something in the valve check, that could cause this? Only 3 V-tec valves were out, and those were barely out...like 2 buckets sizes at most.

any thoughts? Things to try? It's still colder than hell (hell freezes at 40 degrees), so I haven't ridden it yet other than the first night around the neighborhood (ran great).
#2
Probably Electrical! :goofy:




Don't think I would worry to much yet, have you let it run long enough to cycle through cooling fan on-fan off ?
#3
condensation in the exsaust pipes?
byproduct of combustion is some water.

long as it goes away when it the engine warms up i wouldnt worry about it.
#4

[image: View Post]ericlw, on 29 December 2009 - 09:11 AM, said:

condensation in the exsaust pipes?
byproduct of combustion is some water.

long as it goes away when it the engine warms up i wouldnt worry about it.
:+1: :+1:
#5

[image: View Post]Baileyrock, on 29 December 2009 - 09:02 AM, said:

Probably Electrical! :goofy:




Don't think I would worry to much yet, have you let it run long enough to cycle through cooling fan on-fan off ?

I haven't tried to fix it with my hammer yet, so i can't tell if it's electrical...:goofy:

I ran it to 138 degrees in the garage, while in gear..fan came on as it should. I then took it on the road for about 1 mile in my neighborhood. The big concern was when I blipped the throttle...I wouldn't have been surprised to see some smoke on initial startup because of condensation, sitting, carb cleaner in the throttle bodies, etc. I guess I will have to ride it and see...but not tonight, they are claiming snow may be coming (doubtful in Texas, but we did get a little...)
#6
After I did mine I heard a dozen new noises, it smoked, throttle response was questionable, it was hard to start, smelled funny, etc. etc. :goofy:

Get in 20 miles or so before you start worrying. :fing02:
#7

[image: View Post]dutchinterceptor, on 29 December 2009 - 12:11 PM, said:

After I did mine I heard a dozen new noises, it smoked, throttle response was questionable, it was hard to start, smelled funny, etc. etc. :goofy:

Get in 20 miles or so before you start worrying. :fing02:

One more reason to NOT check your valves! :biggrin:
#8
I thought for a moment this was some kind of M Knight Shamalan Motorcycle movie topic or somthing. Ya know where the kid can fix bikes in the dark just by talking to them.


YUP combo of sitting in the garage for an extended period, and cold.
#9

[image: View Post]HispanicSlammer, on 29 December 2009 - 12:01 PM, said:

I thought for a moment this was some kind of M Knight Shamalan Motorcycle movie topic or somthing. Ya know where the kid can fix bikes in the dark just by talking to them.


YUP combo of sitting in the garage for an extended period, and cold.

I have the Midas touch when it comes to mechanical stuff...unfortunately it only applies to me, and as soon as I hand it back as "fixed" it seems to stop again, until I look at it. This gets annoying! I also talk to things i am working on, but that is a different issue. Sometimes we argue, and usually they are right.
#10

http://www.vfrdiscussion.com/forum/public/style_images/light/snapback.png' alt='View Post' />dutchinterceptor, on 29 December 2009 - 10:11 AM, said:

After I did mine I heard a dozen new noises, it smoked, throttle response was questionable, it was hard to start, smelled funny, etc. etc.
Get in 20 miles or so before you start worrying. http://www.vfrdiscussion.com/forum/public/style_emoticons/default/fing02.gif

Put a few miles on it. I'm betting on condensation. The only thing I can think of in a valve adjust that would lead to smoking are the gaskets/o-rings associated with the pair system. Seems pretty unlikely to me.
End of thread · 10 posts recovered Wayback Machine snapshot 12 Apr 2010