I have a stock 02 ZR8 that I installed 410 mains in. I rode the sled 150 miles this weekend & checked the plugs a few times. They didn't look as tan as I would have liked. Should I turn the fuel screws or leave them alone ? I ride at 1500 ft in NH & ME.

Have an 02 zr 800 carb. *I went up to 450 mains with a power breather and gutted airbox. *This is good down to zero degrees. *I run in New Hampshire mostly and the sled gets 15 mpg faithfully have 461 miles on it. *I would say that you are probabbly a little lean. *I always jet for safety and this seems close. I would go up a few sizes. *Stock jetting is pretty close. *Unless you are racing leave it stock