- Oct 17, 2021
I have a 1975 Commando Mk3. The motorcycle runs really well. There is no visible smoke out of either exhaust while riding or while the engine is idling. The engine idles great it runs very smooth and strong. I have never had to add any oil and the engine has excellent compression. The spark plugs look great with no oil on either plug. The problem is that when I shut down the engine after it has been running more than 2 - 3 minutes, a large amount of smoke comes out of the right exhaust. No smoke comes out of the left side. It is a very light-colored smoke which continues to come out for about 3 - 5 minutes. I'm at a loss as to the cause. I've put around 500 miles on the bike since I purchased it and this has only developed recently.