Jumping up to a 134 size main jet?

Hey everyone, first time posting here. I have an 85 XJ700 Maxim that I'm in the process of completely redoing. It's been a long project, but I'll post the final outcome in another thread.

Anyway, last summer I gave the carbs a stage 3 jet kit which gave me a 112 main jet. I believe it was a 107 that came out of it originally. A buddy of mine gave me a set of 134 main jets from his old bike, and they will fit my carbs. My question is, is this too big of a jump? I'm not super familiar with carb tuning, as I had a lot of trouble with it last year, but I feel better about my ability now. Has anyone here ever done a jump like this? What is usually involved? (different pilot sizes? air screw adjustment? etc.)

I am currently using a 4-into-2 exhaust with high flow baffles, and pod filters with velocity stacks.

 

Best advice anyone has ever given me and I have tried to adhere to myself best as I could, get it running properly with as much stock everything as possible. Then as you make changes in components and tuning you have a baseline to reference. To me that sounds like way too much of a jump in jet size. I went from 40 to 42 on the pilots in my 650 and it made a huge difference.

 

the stage 3 kits are supposed to be what you need based on info you gave the kit company.

what bike are we talking about?

the bigger the jets the less mpg you get. you want to tune your bike for mpg and quickness/speed.

at some point you lose mpg without gaining much performance increase

 

My bike is a 85 xj700N Maxim. I got quite a bit of performance increase after the stage 3 install. I was just curious if a bigger jump in main jet would yield more power effectively. Like I said, I got the jets for free so it's just curiosity while I have the bike apart.

 

Power happens when the mixture is correct for as complete a burn as possible. Bigger jets do not automatically mean more power (in fact it can quite often mean less).

 

getting an air box to replace pods may be the answer to improved performance

 

Understood. Do you think I will have to modify the airbox at all? (Drilling holes, etc..) I have 4 pod filters with velocity stacks. When I was having tuning issues last year, the stacks corrected my full throttle range.

Other mods are a 4-2 exhaust with high flow baffles.