Honda cbf125. Change airbox to a conical air filter for space

[Owen hudson]

Hello! 
 

I am currently doing a cafe racer build on my Honda cbf125. 
 

I would really like to get rid of the air box and replace it with a conical air filter to free up the middle space in which I can then move my battery down to that space to make the flat seat 

 

the problem is that the air filter has a crankcase breather going from the engine into the air box 

 

what would happen to this if I wanted to remove the airbox?

[Old-codger]

Just put a little crankcase filter on where the pipe used to exit the engine. The pipe is usually pushed onto a spigot so its just a matter of getting the correct diameter to fit that spigot.

[bud]

You are going to change the jetting in the carb right? I think 20% on the main is usually a good starting point.

[Owen hudson]

9 hours ago, Old-codger said:

Just put a little crankcase filter on where the pipe used to exit the engine. The pipe is usually pushed onto a spigot so its just a matter of getting the correct diameter to fit that spigot.

Yes only just realised this was a thing thank you!

[Owen hudson]

7 hours ago, bud said:

You are going to change the jetting in the carb right? I think 20% on the main is usually a good starting point.

Yes I did read that you need to adjust the jetting. I just don’t know how to do that but I will look into it. Thank you