Re: #41 chain / Get One!
A good quality #41 industrial chain is a definite improvement that is highly recommended for several reasons. They typically run smoother and quieter than the kit supplied 415 chain. It is not uncommon to find tight rollers, twists and kinks in the kit chains. A good #41 will be just slightly wider, very slight, and will allow for some misalignment between the drive and rear driven sprocket. They also seem to fit the sprocket teeth better.
Keep them lubricated with the lube of your choice, chain saw chain and bar lube works great and you'll be much happier with your drive system.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"