CB350 Intake Boots not lining up quite right.........

[invincibleone]

Building up a CB350 motor for WERA & USCRA racing next season; nothing too crazy.....
Problem is, the new oem Honda intake boots don't quite line up with my intake manifold runners. They're about 1/16 off.
See pics.
Thoughts? Thinking of opening up the mounting holes on the boots? Porting my head is prohibited in both classes I run.
-Fissel
#490 USCRA/WERA

 

[xb33bsa]

yeah if yer not allowed to touch the port just oversize the holes a bit ,use an AN style warsher on the bolts job done

 

[hillsy]

Are they any better / worse if you rotate them 180 degrees?

 

[invincibleone]

Are they any better / worse if you rotate them 180 degrees?

yeah if yer not allowed to touch the port just oversize the holes a bit ,use an AN style warsher on the bolts job done

Yeah, I was thinking that ovalizing the holes to help the boots line up was probably my best option, I was just a little worried that they may slip back with the vibration and weight of the carbs/velocity stacks/filters. I'll give it a try and report back.

And hillsy- CB350 intakes have about a 15° angle so that carbs point slightly outward from engine so it is not possible to rotate them 180°. Thanks though.

-Fissel

 

[hillsy]

What about swapping them over to the other side(s). Same as rotating them where they are.

 

[invincibleone]

What about swapping them over to the other side(s). Same as rotating them where they are.

Same result; that is, it is the same amount off whether you use it on the right or left cylinder. So head itself is very consistent, both intake boots are not.