Yz450f airboot diameter

[H-B-R]

I'm working on a little project and it looks like the airboot from an '03-'05 or '06-'09 yz450f has the correct shape I'm looking for. What I can't seem to find is the diameter of the airboot where it slips onto the carb.

Would anyone happen to know the diameter of the carb/airboot?

Thanks

[nuity5]

03 YZ450F - Looks like basically 55mm. I didn't pull it to be 100% sure but my 03 YZ250F appears to have basically an identical airbox in case you can find one of those eaiser. Here's a pic of the carb entrance. Clay

 

[H-B-R]

Thank you. That helps a lot