What a piece of junk! Do not buy this. I purchased a barn find 1971 skidoo 335, had been sitting since 1991, It ran flawlessly believe it or not, but I wanted to rebuild it just in case. New seals and ignition, and when I was done, it wouldn't drive without backfiring, I checked the timing advance tab, it was moving. I double checked the wiring. And I knew it was the coil. A month later I braved it and put the old coil back on and it's like a brand new sled. Well as brand new as a 1972 skidoo can be! The fit was good! The finish was good but the quality of the part is junk, don't waste your money.