Bobby Forrest
ArboristSite Lurker
So I have a 385xp. Everything was great with it till the family ran it with low oil in the gas. Melted part of the piston and scracked the cylinder wall fairly well.
So while it's down, I plan on playing a little. Everything I have read says I can get a 390xp piston and cylinder. I'm studying to do a mild port job and a muffler mod. What can be don't to the carb? Carb swap, polish the inside for better air flow.... would the timing need advancing? Anything else to do? Increase spark?
So while it's down, I plan on playing a little. Everything I have read says I can get a 390xp piston and cylinder. I'm studying to do a mild port job and a muffler mod. What can be don't to the carb? Carb swap, polish the inside for better air flow.... would the timing need advancing? Anything else to do? Increase spark?