Feuling Parts 07100264 Oil gaugeRef : FELG00131A / 07100264

Feuling Vent Gauge designed to replace the original oil filler cap and vent excess pressure from the crankcase via a PCV-type breather. Machined and engineered to limit blow-by accumulation in the reservoir, it features an oil separator, a perforated disc, a replaceable filter, and a non-return valve for clean and reliable operation. Made in the USA.

• Function: vents excess pressure from the crankcase and reduces blow-by accumulation in the oil reservoir.
• Level reading: two possible methods — bike on the side stand (FHS) or upright and level (FHU) for accurate hot oil level checking.
• Ventilation options: 1/8 NPT fitting with internal filter or quick connect with rubber hose and filter.
• Maintenance: replaceable filter for simplified upkeep.
• Manufacturer's advice: Feuling recommends a hot oil level between 90 and 99% for proper filling.
• Precautions: the gauge becomes hot — use a glove when checking.

Tests mentioned by the manufacturer indicate a decrease in usable engine oil level, a freer engine, and a reduction in consumption and blow-by. Note: the oil suction port is located on the right side of the engine, and warming the bike on the side stand may skew the reading.

Manufacturer's ref: 3090 — particularly appreciated by owners of custom and vintage/classic touring bikes (e.g., Harley-Davidson FXDLS, FLSTFBS, FLSS).