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Smoke after rebuild.
- Thread starter Roy
- Start date
That was my first thought as well, I know you said you installed new valve seals, but that’s where my suspicions would lie.
No mention of Valve Guides Serviced .
ckahleer
XS650 Addict
A year ago, I had the same issue on a KZ305. It turned out I damaged an intake seal when I replaced it.
I was able to re-replace the seal without removing the head by stuffing the cylinder with rope.
I was able to re-replace the seal without removing the head by stuffing the cylinder with rope.
I didn't do anything with the guides.I couldn't feel any play in them.
500 miles aee..hh Thinking out loud Positive Thinking
Maybe it is the seal rather than ..guide
If it is rebuilt
Can consider about driving for a while longer to see if it changes I admit it can be borderline reality distortion
But it happens .. Seals needs some oil on them and a couple of heat cycles.
That is why they good bad .To little use for to long time -- dry up .. There are tight play in the guides
Maybe the valves have been flipped .going in to the other side
Check so there is Valve Play.
Assuming compression is good And no strange sounds Spark Plug reasonable correct A little smoke for a while .. I would consider doubling up those 500 miles .And then reevaluate
Maybe it is the seal rather than ..guide
If it is rebuilt
Can consider about driving for a while longer to see if it changes I admit it can be borderline reality distortion
But it happens .. Seals needs some oil on them and a couple of heat cycles.
That is why they good bad .To little use for to long time -- dry up .. There are tight play in the guides
Maybe the valves have been flipped .going in to the other side
Check so there is Valve Play.
Assuming compression is good And no strange sounds Spark Plug reasonable correct A little smoke for a while .. I would consider doubling up those 500 miles .And then reevaluate
I like the way you think! I really don't want to tear this apart again. It's just a short puff of smoke, and then it's gone. Doesn't seem to be using any oil. I've done one oil change since the rebuild.
Borescope it... Wrist pin clip failure... Don't ask how I know Grrrrrrrrrrrrrrrrr 
If it's just the single puff when starting and no other indications of a problem, I'd just let it be.
If it was a wrist pin clip, your rings would be about half destroyed by now.... with constant smoking and a loss of power on that cylinder. Nasty stuff that. Doesn't sound like your problem. Your "problem" doesn't sound like a problem. Jus' go for a ride and enjoy it.
Condensation? Like the puff of vapor and water drip from the exhaust of my Toyota at the first start-up of the day. Weather, temperature and humidity all in play there.
Leaky float valve?
