Vectorblue

Many thanks for both of your advice and comments, looks like I'll try a 10W40 type soon. Vectorblue

I am ready to change the oil on my new 2011 V-star 950 for the first time. The bike has 500 miles on it and would like to use Mobil 1 20W50 synthetic oil as a replacement. I enjoy the bike very much but experience a "clunk" when I engage the transmission into 1st gear when I run the bike after a 2-3 minute warn-up. Any thoughts would be appreciated.