Martin, who entered the afternoon seven points ahead of Musquin, extended his points lead to a double-digit margin of 19 with four rounds remaining. Rockstar Energy Husqvarna Factory Racing's Zach Osborne, who finished fifth overall (7-7), sits third, 108 points back.
Martin missed out on the win at his parents' track, but still extended his points lead.
Photo: Simon Cudby
"The day started off really good. It's always nice to be home. They some home is where the heart is and that's definitely how I feel when I'm here," said Martin. "The first moto was good, but I missed a shift and that allowed them to gap me. Then a bolt came out of my clutch so I had to learn how to ride without it. It took some time for me to figure it out, but I put in a push on the last lap where we just missed out on second. In the second moto I got the start I needed and was able to just ride my own race and pull away."