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I purchesed a set of twin pipes off a mid 90's inday 500. I have no clue what they are (no marking what so ever) i need a base jetting or suggestion on how many sizes i need to move up. I am goin to some grass drages this weekend and i would like to take it. I have to rejet for the temputure first I know this ( jetted for winter) but how many sizes main should i go richer and pilot ? suggestions on clip placement and a/f screw setting. I am not expecting any bang on answers..just a base. I know how to jet after that ( plug colour..feel...flat spots or back firing) just need some where to start. Ohh its a 97 xc 440 stock except weisco pistons. thanxs
 

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You better check and see how the sled is going to run and if it will even work better than stock with those pipes. I have no idea why you would get pipes that were not specifically made for your sled.
 

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xc 440 isnt that the valved eng? those pipes wont work right on that eng if thats the case.
 
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