Blue smoke from my CT :(

[Essex Nige]

Was going out yesterday, done about 15 miles then the smoke lots of it and loss of what little power a CT has.... when it idles its fine, put it under load and i'm a red arrows new recruit
I suppose i know what it is, rings? just want confirmation

[VWCamperfan]

Hard to say really without seeing it.
Is the smoke coming from the exhaust?
Check your air filter box for oil, can colllect in there sometimes after coming through the breather pipe and then make it's way to the carb.
Get a compression check done on all cylinders, will tell you quite a lot that will!
Drain oil from engine and see if any fragments of rings have made it to the strainer... A possibility.

Good luck.

[dugcati]

sounds like either rings or a dying valveseat/valveguide to me gonna be open heart surgery eitherway

[Essex Nige]

Hard to say really without seeing it.
Is the smoke coming from the exhaust?
Check your air filter box for oil, can colllect in there sometimes after coming through the breather pipe and then make it's way to the carb.

Yep i have oil in the airfilter box, but a lot of it which has only just arrived... On saturday i put some stop leak stuff in the oil, do we think it has blocked something else?

[VWCamperfan]

It could have done. These engines run hotter than a watercooled engine and any additives in the oil tend to be affected by the extra heat.
This can sometimes lead to a blocked filter due to the addative getting 'stuck' in there.
Check your oil level again to make sure it wasn't overfilled and just for a few miles take off the breather pipe from the air filter box so that any oil coming through won't get into there. Try it then to see how i runs.
The spark plugs could have been contaminated with oil so a quick clean wouldn't do any harm but they should clean themselves after a mile or two anyway if it's just oil contamination.
I'm guessing your air filter is a bit soggy too now! Again, take out and run for a while. Remember to replace these parts asap though after a run. Just make the changes as a temp fix to make sure the engine is ok.
There could be an underlying cause of oil in the filter box ie. high crankcase pressure due to blow by around the piston/rings causing oil to be pushed up the breather stack and through the breather pipe. Check to see how much air is being blown through the breather pipe when the engine is running. Shouldn't be any more than a very gentle blow of air coming through.
Meanwhile... Have fun cleaning your filter box!