1981-1984 Official Honda ATC250R Shop Manual, Page 17Get this manual

ATe 2S0R Wash the element in non-flammable or high flash point solvent, squeeze out the solvent throughly, and allow to drySoak the element in gear oil (SAE SO-90) and squeeze out excessPlace the element onto the element holderGrease the sealing edge of the holderInstall the element holder into the air cleaner caseInstall the air cleaner case cover
MAINTENANCE

WASH IN SOLVENT

SQUEEZE OUT SOLVENT THOROUGHLY

GEAR 01 SQUEEZE OUT (SAE SO-90) EXCESS OIL

SPARK PLUG
Disconnect the spark plug cap and remove the spark plugVisually inspect the spark plug electrodes for wearThe center electrode should have square edges and the side electrode should have constant thicknessDiscard the spark plug if there is apparent wear or if the insulator is cracked or chippedMeasure the gap with wi re-type feeler gauge and adjust by carefully bending the side electrodeSPARK PLUG GAP: 0.7-0.8mm (0.028-0.031 in) RECOMMENDED REPLACEMENT PLUG:

• ATV
• Jet Ski
• Outboard Motors
• Personal Watercraft
• Snowmobiles
• Stern Drives