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STOCK JET IN MOST XR AND CRF50'S (AND_Z50R) IS A #58 * THESE ARE ALL OEM HONDA JETS !!

@ *SIZE 62 MAIN JET 99101-ZG0-0620 1/22A 201C/62
@ *SIZE 65 MAIN JET 99101-187-0650 1/22A (201B) 201B
@ *SIZE 70 MAIN JET 99101-187-0700 1/22A (201C/70) 201C/70
@ *SIZE 75 MAIN JET 99101-187-0750 1/22M (201C/75) 201C/75
@ *SIZE 78 MAIN JET 99101-187-0780 1/22M (250W) 250W