The old plugs looked fine, just carboned up. It was running ok so I took it to an offroad park last fall, played all day and had to limp back to the trailer cause I couldn't keep it running, part of it was the dirty air filter( PO's sock around air filter was clogged up, no filter), and the left side not firing properly. These plugs were 46's .035gap, book says should be 43s. I put 43's in it.