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have a 1998 670 that i picked up and have been fixing just needed some hep with jetting checked out what it has in it right now and its got a 640 on mag side and 660 on pto side main jets not sure how the number work still new to the sport i live in edmonton alberta does anyone know where i...

hello there just got a 1998 670 the guy told me he used it in the mountains wanted to find out what i should jet it at have to take the carbs out and see what its jetted at will let you know but does anyone know what the jetting should be for around the edmonton area ?