Hi, Thanks for the link to the article! I used 20w oil in my carbs and it seems like pretty heavy-weight stuff. Should I use lighter oil? The wording is a bit confusing in the article because I thought that 20W is heavier than 30W

Here's what the article says:

The oil reservoir in the suction piston rod in which the oil damper plunger is equipped should be topped up to the level periodically every three months or 5,000 km (3,000 miles) with thin engine oil of preferably SAE 20 but not thicker than SAE 30.