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00v_Lucky · July 11th, 2010, 04:51 PM

Okay I am lost on how to actually change out the main jet with the dyno one mainly because there are 2 different looking things.

1. the "keeper/guide" of the needle the first brass part to touch the needle and the long "main jet" that actually screws in.

The problem is that the replacement (DJ98) is too small to screw into the threading of the original main jet.

My question is that does this new replacement (DJ98) main jet replace that keeper or guide part or does it act as something that goes in between the two stock parts?

I know this may sound confusing but I am totally lost. Could any one care to go step by step on actually changing out the main jet?

Thanks in advance

Side problem: I have damaged the head of the mixture screw while drilling them out. I can manage to twist the screw but not so easily.

is it possible to get a replacement screw? or is that screw not supposed come out? (because it sounds like there is a spring in there, that might pop out)

July 11th, 2010, 04:51 PM	#1
00v_Lucky ninjette.org sage Name: Howard Location: Cypress, So. Cal. Join Date: Feb 2009 Motorcycle(s): '09 Candy Thunder Blue Ninja 250R Posts: 618	Noob Jetting Question Okay I am lost on how to actually change out the main jet with the dyno one mainly because there are 2 different looking things. 1. the "keeper/guide" of the needle the first brass part to touch the needle and the long "main jet" that actually screws in. The problem is that the replacement (DJ98) is too small to screw into the threading of the original main jet. My question is that does this new replacement (DJ98) main jet replace that keeper or guide part or does it act as something that goes in between the two stock parts? I know this may sound confusing but I am totally lost. Could any one care to go step by step on actually changing out the main jet? Thanks in advance Side problem: I have damaged the head of the mixture screw while drilling them out. I can manage to twist the screw but not so easily. is it possible to get a replacement screw? or is that screw not supposed come out? (because it sounds like there is a spring in there, that might pop out)