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I just bought a 86 trx 250r from Idaho. I live in cali. and ride mostly between see level to 1000 ft. it has a pro circuit pipe, cool head, and k&n in the air box. Not sure on the dome size and im pretty sure its standard bore. just woundering what would be a good base line for jetting. the guy i purchased it from said it was jetted for 2000' to 3000' so i know its lean, so i havent ridden it, infact i tore it down to get it powder coated.
 

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Well stock they had a 150 main and a 48 pilot jet I'm fairly sure whatever it's at go one up on pilot and three sizes up on main that should be a decent start your pilot jet shouldn't be a whole lot bigger than stock no need for it to be with the light mods it has you can always play around with the air screw as well
 
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