⟲ 360° — drag meThe facts.
| Part Number | KN-204-1 |
|---|---|
| Brand | K&N |
| Filter Medium | Modern synthetic |
| Hex Size | 17 mm |
| Safety-Wire Drilling | Yes |
| Anti-Drainback Valve | Yes |
| Over-Pressure Relief Valve | Yes |
| Canister Wall Thickness | 50% thicker than standard |
| Fitment | Honda CBR 600 RR PC37 (2003–2006), PC40 (2007–2016) |
DescriptionThe whole story▼
When engine protection and regulatory compliance matter most, the K&N Racing Oil Filter KN-204-1 sets the standard for Honda CBR 600 RR owners running both road and track. Engineered to meet the demands of competitive motorcycling, this filter combines a safety-wire drilling for scrutineering compliance, a 50% thicker casing than standard filters, and a modern synthetic filter medium — giving you the confidence to push harder knowing your engine is genuinely protected.
Key Features
- Safety-wire drilling on the casing allows the filter to be wire-locked for track use, satisfying most circuit and race series scrutineering requirements straight out of the box.
- 17 mm hex end-nut enables removal with standard workshop spanners — no dedicated filter wrench or specialist tool required, saving time during race-day oil changes.
- 50% thicker canister walls compared to OEM-equivalent filters deliver superior structural integrity under the elevated oil pressures and temperatures of track riding.
- Anti-drainback valve retains oil in the filter between runs, eliminating dry starts and protecting bearing surfaces at every engine-on moment.
- New over-pressure relief valve regulates oil flow under extreme conditions, preventing filter bypass and ensuring consistent lubrication even when oil viscosity spikes.
- Reinforced baseplate with a double-rolled seam gasket creates a leak-proof seal that remains secure across multiple heat cycles and the vibration of race use.
- Synthetic filter medium is fully compatible with modern fully-synthetic engine oils, delivering excellent filtration of metallic particles, carbon deposits, and contaminants.
Built for the Track, Refined for the Road
The KN-204-1 was developed with competitive riding in mind. The safety-wire port is not a token feature — it is machined precisely to accept standard lock-wire gauge and sits at the correct angle for rapid, compliant installation. Combined with the high flow rate through the synthetic medium, the filter maintains oil pressure where it is needed most: through the crankshaft galleries, cam chain tensioner, and valve train of the CBR 600 RR's inline-four at sustained high revs.
For road riders, the anti-drainback valve and pre-lubricated O-ring cartridge mean every cold start is as protected as the last. The double-rolled seam construction eliminates the risk of the baseplate separating under torque — a known failure mode on cheaper filters used in high-vibration supersport applications.
K&N's Engineering Credentials
K&N has been manufacturing performance filtration products for over 50 years. Their racing oil filters are developed using the same high-flow, high-filtration philosophy as their air filtration range — verified across decades of motorsport use from club-level track days to professional racing series. Every KN-204-1 leaves the production line built to withstand race fuel, fully-synthetic oils, and the thermal cycling that destroys lesser filters.
Fitment & Compatibility
The KN-204-1 is a direct-fit racing oil filter for the following Honda models:
- Honda CBR 600 RR PC37 — model years 2003, 2004, 2005, 2006
- Honda CBR 600 RR PC40 — model years 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
Always verify fitment against your frame identification number before installation. Follow Honda's recommended oil change intervals and torque specifications when fitting.
Specifications
- Part number: KN-204-1
- Brand: K&N
- Filter medium: modern synthetic
- Hex size: 17 mm
- Safety-wire drilling: yes
- Anti-drainback valve: yes
- Over-pressure relief valve: yes
- Canister wall thickness: 50% thicker than standard
- Baseplate: reinforced with double-rolled seam gasket
- Oil compatibility: mineral, semi-synthetic, fully-synthetic, race oils
- Fitment: Honda CBR 600 RR PC37 (2003–2006), PC40 (2007–2016)
FitmentWhich bikes this fits▼
- Honda CBR 600 RR PC37 & PC40 (2003–2016)
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