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 Topic: Main Jet sizing 







80XAR

 
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Main Jet sizing

80XAR » Mon Sep 24, 2007 7:29 am

Hi guys
I am finally ready to derestrict my MC21. At present it is full std with exception of a set of cans on std chambers

What i will be doing is the GPS splice, and the PGM splice. From what i've read these 2 mods alone, do not require any carb rejetting

Next on the list was to cut the air box (to copy the TYGA version)
From what ive read, this DOES require re jetting. Info i've gathered from this site and the TYGA site say that going larger in the main jet alone is enough to keep the bike safe to ride without running lean.
Obviously this requires testing to get the right jet for my bike.
What i want to know is, what is the std jet size, and what is a good starting point (ie what size jet is common for a MC21 with these mods)
Im in AUST. Comming into summer. Bike is street ridden. I was thinking 142 or 145. I dont really want to change every jet and have the thing right on the edge. Just want it to run safe and make best use of the above mods, without it running lean.
Any info would be appreciated.
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