This is a discussion on K&N: worth it? within the Grom Racing forums, part of the Honda Grom Garage category; As a mild power hop-up I'm considering swapping out the OE air filter for the K&N so-called "high flow" filter that sits in the standard ...
As a mild power hop-up I'm considering swapping out the OE air filter for the K&N so-called "high flow" filter that sits in the standard airbox. Is it worth doing? Obvs would need to consider fuelling but I already have a PC5 so if necessary I can adjust.
Super!Stock 2018 DSR Honda Grom
Dhm Custom Hi Comp Piston
Dhm Race Ported Cylinder Hd
Dhm Velocity Intake Dcr2 Cam
Stock Ported TB Hindle Exhaust
Lightend Flywheel and Oil spinner
Takgawa Crank Support 4th Bearing
Takgawa Hi Ign Coil w/NGK Cable
Takgawa Hi Flw Oil Pump w/Opmid
Clutch Plate Mod w/SMR Springs
Galfer Disk Wave Rotors and pads
SpeedLinez Brake Lines w/Short Levers
Ohlin Fork Springs Ohlin HO 424 Rear Shock
GFz Billet: Vented Cam Cvr, Spd Spacers, Hdr Gasket
I currently use a Koso "Hurricane" filter element and a Brock's velocity stack inside of my air-box. I get the same speed / power / feel as I did with the stock air-filter element. Your experience may be different, but that's my data point.
Koso 170 4V/34mm TB/Koso injector/ DIY intake/ aRacer Mini5 + AF1 + DG1
Koso pump & chain tensioner/ Stock clutch ring / 60% stiffer springs
Takegawa Crank Support Bearing / Takegawa Catch Can / Kitaco Clutch cover
Clear cam sprocket cover/ Egay oil Cooler
Ohlins F&R / Hindle exhaust w DB killer / Galfer brake line w EBC HH Pads
Pro Taper grips, G2 throttle tube / Gromfatherz axle spacers
Kepspeed alum. swingarm / Bar end mirror, RAM mount, USB Port
Seat Concepts / Opmid V2
I'd say no to the OP's question. You can do your own research but K&N's appear to allow more dirt to pass through them. I doubt even if it does flow more air there will be any benefit on a 9 hp stock motor.
From my dyno data, ALL panel filters (BMC, K&N, KOSO, etc) perform the same as a stock filter with the mesh screen on the back removed. The only ones with a real benefit is the ones that are cleanable as the stock is not.
Stock grom with yoshimura rs2 exhaust. The blue and green are with the airbox lid off (koso vs stock), the red and purple are with the lid on. This is comparing the koso (thin foam) filter vs stock filter with mesh removed with and without the airbox lid.
Bone stock grom (over 1k miles, broken in)
Blue stock airbox lid on (no intake mod)
Red is still a stock airbox with the airbox lid removed (no intake mod)
Green is without the airbox lid with the intake mod (removed mesh behind filter, remove small tube at the back of the airbox)
2015 Honda Grom, 2017 Honda Grom, 2019 Honda Grom, 2019 Honda Monkey
IG: CameronJonesRacing & CJR_Performance for the most current updates.
Dyno thread: https://www.hondagrom.net/forums/13-...ts-graphs.html
Build thread: https://www.hondagrom.net/forums/27-...ace-build.html
Dyno's and Video Logs coming soon so leave me a comment and subscribe! - https://www.youtube.com/channel/UCY0...Lxhacvn2wE2JoA
Thanks all, I think the decision is made.
Next step will be a Takegawa 181 kit with cam and dyno setup with PCV. I'll post up the printouts when it's done
think about this.... the grom makes 8 horsepower. it has an air filter about the same size as bikes that make 180 horsepower. do you honestly think that it's starving for air?
people have this idea that their engines are starved for air, but of course this isn't the case. the restrictions are NOT in the airbox.