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hi my buddy has a mxz 800 he ask me today what a the difference was from a 510 jet and a 510n jet anybody know. thanks
 

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N Series main jets are designated N for the flow characteristics.

The 510N flows the same as a 540 main jet
The 520N flows the same as a 560 main jet
The 530N flows the same as a 600 main jet

Be careful when using the N jets. If your sled calls for a 510N and you put a 510 regular in it, you will be 3 sizes too lean...
 
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