Key Features & Benefits – ACL Race Suzuki M15A/M16A/M18A main bearing set H (STD)
The ACL Race Suzuki M15A/M16A/M18A main bearing set H (STD) is built for Suzuki M15A/M16A/M18A engines as a main bearing set (crankshaft bearing set). Race Series main bearings commonly use a 3/4-grooved layout, aimed at balancing load-carrying surface area with oil distribution to the rotating assembly.
Race Series features include tri-metal construction and tight wall-thickness tolerances to help maintain consistent bearing clearances. H (STD) matches a standard-size shaft, while the HX (X-version) option is available in the same family and adds 0.025 mm extra oil clearance on a standard shaft versus the H-STD set.
When is this useful?
In a rebuild, the main bearing set directly influences clearance and oil film stability between the crankshaft and block housings. H (STD) fits a standard-size direction when measured dimensions support it, while HX/X-version is used when a controlled increase in oil clearance is part of the build plan.
Technical specs
- Brand: ACL Race
- Product type: Main bearing set
- Engine compatibility: Suzuki M15A/M16A/M18A
- Series: Race Series
- Marking / size variant: H (STD)
- Design: Tri-metal, 3/4-grooved main bearings
- HX / X-version note: +0.025 mm extra oil clearance on a standard shaft versus the H-STD set
- Identifier: 5M8443H
Selection & installation tips
- Choose by measurements: measure crank main journals and housing bores, then match Standard, 0.025 mm, 0.25 mm, or X-version to your measured dimensions.
- H vs HX: on a standard shaft, H (STD) targets standard clearance, while HX/X-version is for a deliberate increase in oil clearance.
- Verify clearance: check oil clearance at every main position during assembly, and keep bearing halves paired as a set.
- Inspect housings: confirm housing seats are clean and undamaged, as burrs or distortion can change effective clearance.
- Keep oil paths clear: ensure oil holes and galleries are clean, and that grooves/holes align correctly during assembly.
Before installation, compare your measured journal sizes, housing condition, and clearance target to the selected H (STD) variant, and verify clearance at each main position so the set matches your engine’s actual dimensions.
