Originally Posted by
slakr
I just measured the new one I have (from the link I provided) and it is 1.439 inches overall.
I think Rex says to cut them down to 1.42 inches and round the end.
I didn't take out the one he modded for the 3-port sport since I am still waiting on my O-Rings from MM.
My original 5-port LSN measures 1.611 inches overall. Hope that helps some.
For a little while GO bought out an "intermediate LSN needle", which is probably what you have there. They will work fine. As long as the LSN pulls out of he spray bar at or before full throttle, the engine will tune like most other engines out there with predominantly the HSN, as opposed to the LSN style tuning of the longer needle version carbs.
1.42" is the length of the original (around Gen 3) short LSN. This is the measurement I used after reading Rex's (22Racer) original post, an it works a treat.