If you don't have much experience with jetting you might want to consider a jet kit. I have a '95 which is almost identical to the '97. The Factory Pro 1.7 kit works very well. It includes main jets, slide springs and needles plus drill bits to drill out the main air bleeds. It is a little pricey but worth it. There is also good support through their 800 number.
From the factory cylinders 1&4 have 145's and 2&3 have 150. One step richer would be 148's and 152's.
i would suggest what was suggested to me...that is buy two that are one up and two that are one down.remember that your bike has ram air and because of this will have two sizes,the middle tho will be different from the outer ones.don't make the mistake of buying for of the same because you can swap from the middle to the ouside and vice versa.the best thing to do is to take the carbs out and see what's in there.probly 145's and 150's find a place that sells them and go there once you have the part in your hand it will be alot easier to get replacements.bottom line-more air going thru=you need more fuel as well to make it run properly,or it might be too lean. i just had this problem and it was not fun.if you know what your doing w/carbs then its a snap when you get three or fur different oppinions you will kind of corner your answer.some say swap in smaller jets-but going up a size is the more popular choice. hope i helped
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