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02337 · October 2nd, 2012, 06:47 PM

So I've drilled out the rivets on my exhaust and shimmed the needle, bike ran great.
Decided to do uni pods and purchased some main jets, bought 110,112, and 115(thought they were 108's :/)

I decided to start with the 110's I put it on with no washers and it bogged a little with no washers, so I tried upping the washers one at a time to a total of 3, bike didn't like it as it bogged/stumbled more in the mid range, runs great at full throttle really pulls hard, compared to before...

So my thinking is to get the 108's and start shimming the needles to its fine tuned. My question is this though, with moving down a main jet size will it cause the upper rpm full throttle to now be lean? I thought shimming the needles was mainly mid range.

Thoughts?

October 2nd, 2012, 06:47 PM	#1
02337 ninjette.org member Name: George Location: Delaware Join Date: Aug 2012 Motorcycle(s): 03 ninja 250 Posts: 201	Jetting reassurance So I've drilled out the rivets on my exhaust and shimmed the needle, bike ran great. Decided to do uni pods and purchased some main jets, bought 110,112, and 115(thought they were 108's :/) I decided to start with the 110's I put it on with no washers and it bogged a little with no washers, so I tried upping the washers one at a time to a total of 3, bike didn't like it as it bogged/stumbled more in the mid range, runs great at full throttle really pulls hard, compared to before... So my thinking is to get the 108's and start shimming the needles to its fine tuned. My question is this though, with moving down a main jet size will it cause the upper rpm full throttle to now be lean? I thought shimming the needles was mainly mid range. Thoughts?