How to change the oil in a 2022 Honda CRF450X Dirt Bike

How to Change the Oil in a 2022 Honda CRF450X — The Ultimate Step-by-Step Guide

Shop parts for a 2022 Honda CRF450X Dirt Bike.

Regular oil changes are essential to keep your 2022 Honda CRF450X running at peak performance, extend engine life, and maintain warranty coverage. Unlike street bikes, dirt bikes like the CRF450X experience higher thermal loads and contamination during off-road riding, making fresh oil and a clean filter crucial. This proprietary MotoSport.com guide walks you through every step — with exact tools, procedures, and model-specific notes you need to do the job right.

Tools and Parts Needed

8mm socket and ratchet (for engine guard/skid plate removal)
10mm Allen or socket (for oil drain plug)
New Honda oil filter (part #15412-MEN-671)
New O-rings (for drain bolt and oil filter cover; replace every oil change for best practice)
Crush washer (for drain plug)
Honda-approved 20W-50 engine oil, or Honda GN4 10W-40 (1.04L / 1.1 US quarts)
Oil drain pan
Funnel (narrow enough to fit small fill port)
Clean shop rags
Torque wrench
Gloves

Preparation

Warm the engine for 3–5 minutes to thin the oil (it will drain fully and remove suspended debris). Avoid excessive idling — just enough for warmth.
Turn off the engine and place the bike securely on a stand. This ensures proper draining and safety.

Removing the Skid Plate or Engine Guard

Use the 8mm socket to loosen and remove the two bolts securing the skid plate or engine side guard. Slide or lower the plate to access the drain plug and oil filter cover. Never skip this step or try to work around the plate; you’ll need clear access.

Draining the Old Oil

Remove the oil filler cap (top left side) so the crankcase can vent and oil drains more freely.
Position your drain pan under the engine. On the CRF450X, the oil drain plug is a prominent 10mm Allen/hex-ended cap located underneath, roughly in line with the gear shifter.
Using a 10mm Allen/socket, carefully break the drain plug loose. Remove it by hand and let all the oil drain out fully. Be cautious — hot oil can burn.
Inspect the old crush washer and replace it with a new one for a proper seal (essential to avoid leaks).

Removing and Replacing the Oil Filter

Locate the oil filter cover on the left side of the engine.
Remove the cover bolts (note bolt lengths or order if different) with an 8mm socket.
Carefully remove the oil filter cover. Some residual oil may spill — keep your pan underneath. Inspect/replace the cover O-ring if it shows any flatness, cracking, or swelling.
Pull out the old oil filter. Wipe the filter cavity out with a clean shop rag.
Install the new filter (make sure it seats in the correct direction, matching what came out — in most Hondas the rubber seal faces outward). Lightly oil the filter’s rubber gasket.

Reassembly

Reinstall the oil filter cover, tightening the bolts evenly and to factory spec (Honda recommends 9 foot-pounds/12 Nm of torque).
Clean any oil off threads, then install the drain plug with a new crush washer and torque to spec (consult manual for the exact value; typically around 18–22 ft-lbs / 24–29 Nm).
Reinstall skid plate or engine guard using previously removed bolts — ensure all are snug and nothing is misaligned.

Adding Fresh Oil

Using a small funnel, pour in 1.04L (1.1 US quarts) of Honda GN4 10W-40 or 20W-50 oil via the oil fill port on the left side. The fill hole is small — patience and a steady hand help.
Optionally, you can fill via the crankshaft sensor cover for faster, mess-free filling (see tip below).

Checking Oil Level (Model-Specific Call-Outs)

Unlike earlier CRF450X models with dipsticks, the 2022 version uses a small fill port and requires you to check oil level with the engine warm and the bike level. After filling with stated quantity:
- Run the engine for 2 minutes, then shut off and let sit for a minute.
- Check oil level via the sight glass (if equipped) or ensure the correct amount is in. If unsure, refer to manual instructions, as some Hondas require loosening a check bolt until oil just starts to seep out.
- Top off if low — do not overfill; too much oil affects performance.

Final Steps

Replace oil fill cap and snug down; wipe away all drips and check for leaks around the drain plug and filter cover.
Record your mileage/time for the next service interval — Honda recommends changing engine oil and filter every 15 hours of operation or after every 6 races for best longevity.

Model-Specific Tips & Call-Outs for the 2022 Honda CRF450X

Small Oil Fill Port: Use a slim funnel or fill via crankshaft position sensor cover as a workaround. Wiping this area clean before opening avoids grime contamination
.
Filter Orientation: Double-check filter placement; reversed filters starve your engine of oil.
O-rings & Washers: Always replace to prevent leaks, especially if riding in muddy or wet conditions commonly faced off-road.
Torquing Hardware: Over-tightening is a common error – always use a torque wrench where possible.
Maintain Service Records: Vital for warranty and resale — jot down hours run or races since last change.

Enjoying Your Next Ride

Performing regular oil and filter changes on your 2022 Honda CRF450X ensures peak performance—keeping your hard-earned investment ready for any moto adventure. For quality parts and accessories, always trust MotoSport.com.

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Disclaimer: This guide is provided for general informational purposes only and is not intended to replace your motorcycle's official owner's manual. Always refer to your manufacturer's documentation for model-specific instructions, torque specifications, safety procedures, and maintenance requirements. If you are unsure or inexperienced, consider seeking assistance from a qualified mechanic or technician.