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VacuumMate Tool in Diagnose Mode while hokked up to two different units. The first one is a '06 Yamaha R1 that has bad intake valves due to a poorly maintained K&N air filter that let a lot of very fine dirt into the engine. The second unit is a '07 Suzuki GSX-R600 that we perform regular services on. You can see the meter going below the line (atmospheric pressure) which means there is blowby past the intake valve causing positive manifold pressure.
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