K&N air filter

[Dave SanF 50]

Gents
What is the correct model number for the K&N air filter for the Honda? I believe it is the RC-1920 or it could be the RC-1250.
thanks

[alangbaker]

Gents
What is the correct model number for the K&N air filter for the Honda? I believe it is the RC-1920 or it could be the RC-1250.
thanks

Measure the outside diameter of the end of the throttle body: I bet it's more than 54mm, which is the ID of the mounting flange for the RC-1920.

The RC-1250 is the same overall height and diameter (top and bottom) as the 1920, but it has an ID of 57mm, and I'd bet large that the walls of the 50mm throttle body on the Honda are something like 3.5mm thick ( (57-50)/2 ). Even should they turn out to be slightly less than 3.5mm, a couple of wraps of duct tape and you'll have a nice tight seal.

But just measure.

[Raceworks]

I've always used the 1920

[Dave SanF 50]

K&N Universal Clamp-On Air Filter: High Performance, Premium, Washable, Replacement Filter: Flange Diameter: 2.125 In, Filter Height: 4 In, Flange Length: 0.625 In, Shape: Round Tapered, RC-1920

$46.99 @ Amazon

[Skelly]

Hi Dave
Dont put the filter oil on the filter. I heard it can affect the sensor in the intake.

Sean