Performance Tool Leakdown Test Kit - W/Case

Performance Tool leakdown test kit for V-twin motorcycles, designed to pinpoint internal engine wear by measuring compression loss across intake, exhaust, and crankcase pathways. Essential diagnostic tool for identifying valve, ring, and seal problems without full engine teardown.

Features

• Adjustable pressure regulator
• 10 mm, 12 mm, and 14 mm spark plug hole adapters
• Sturdy carrying case included
• Identifies valve, ring, and crankcase leaks

Specifications

• Brand: Performance Tool
• Manufacturer Part #: W89729
• UPC: 039564047992
• Length: 15.2 in
• Width: 11.5 in
• Height: 3.5 in
• Weight: 4.8 lbs
• Country of Origin: China (Mainland)

Fitment

Fits all V-twin motorcycles including Harley-Davidson and Indian Motorcycle models with standard spark plug configurations.

Frequently Asked Questions

What does a leakdown test actually measure?

It measures how much combustion pressure leaks past the rings, valves, and gaskets — revealing wear that compression tests alone can't detect.

Do I need special air pressure to run this kit?

Yes — you need a shop air compressor set to the regulator pressure shown in the instructions, typically 100 psi.

What spark plug sizes does this fit?

Includes adapters for 10 mm, 12 mm, and 14 mm spark plug holes, covering most V-twin motorcycles.

Is this tool for home mechanics or shops only?

Either — it's a precision diagnostic tool, so patience and a steady hand help. Shops and experienced riders use it regularly.