main jet? large round or small round?

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srx2002

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quick question, I'm trying to order a set of 155's BEFORE I attempt taking them apart....I understand there are two types of Mikuni round jets....do I need " small round " or " large round " mikuni jets.


P.S Do i have to remove the carbs from the bike to change from the stock 152.5 to the 155??

P.S anyone have a Yamaha part number for the 155's?


thanks in advance!
 
Get the small, that way you wont have to take off the float cover each time you swap mains.

Thay can be swapped using a flat head screwdriver and a toothpick, if you are careful.

You will have to un-clamp the carbs, but you will not have to totally remove em.
 

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