This afternoon I had about as much of Christmas Telly as I could take, so I went down my shed and swapped the jets in my carbs.
This is the main jet the needle drops down into. The standard jet is a 112. This allows a fixed amount of fuel into the engine from the float bowl. This amount of fuel is directly connected by the amount of air the CX's air box allows into the carbs.
Because I have replaced the CX air box with Hi-flow filters this will upset the balance between the fuel/air mixture in the carbs, and the air to fuel ratio is now out of sink.
I have gone up one jet size to 115's as the hole in them is a tiny bit bigger it will let more fuel in to help restore the balance of mixture, and also produce a bigger bang resulting in a little more power.
Because of this the dB killer is now not as effective as it was and the bike is just a little more noisy than with the 112 jets.
As I've been rebuilding the bike I've been changing out as many of the old screws and bolts for stainless hex cap head screws as I can. They are so much easier to do up and undo than cross heads and look better too.
After I got the carbs back on I took it out for a short blast and the new jets really have woken up the carb's. I just need to do a bit more to the set-up, and balance the carbs, then book a slot on the Dyno to see if the changes I have made have had a positive effect on the motor.
As usual I'll be doing a write up on balancing the carbs at a later date, so if you are mildly interested keep an eye on this thread.