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Old 01-31-2013, 10:37 PM   #7
Rot Box
Gnarly Adventurer
 
Joined: Oct 2010
Location: Northern Utah
Oddometer: 190
Awesome. Can't wait to see more

I have an air cooled 84 CR500 and it was a "ping king" like most of the YZ490's. I like the Eric Gorr head mod but the biggest game changer for me was the 39.5mm Keihin PWK and a lot of fine tuning with different needles. I have not had it in the dunes yet but as far as trail riding it has not pinged since. I can't recommend that carb enough if you can find one for a decent price jump on it.
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94 ATK605DSES - 1984 CR500R - 1981 XL500S
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