Restore cylinder sealing and throttle response on Suzuki’s 400cc Eiger and KingQuad ATV lineup with this STD bore piston ring set. It covers LT-A400 (Eiger) and LT-F400 (Eiger/KingQuad) models from 2002 through 2017, using an 82.00 mm standard bore. By renewing the top, secondary, and oil-control rings, it reclaims compression, reduces oil consumption, and brings back crisp throttle feel. This aftermarket option provides a precise fit at a value-focused price point for trail and farm use.

Over time, worn compression rings and oil rings cause blow-by, compression loss, and higher oil consumption, dulling throttle response. This STD ring kit targets those wear points with fresh compression rings and an oil-control ring to restore sealing and power. The kit's 82.00 mm standard bore matches the original Suzuki specification, delivering predictable performance and reliable operation on rough trails or demanding farm work. It's an affordable aftermarket option that mirrors Suzuki's original specs, making it a dependable choice for everyday trail riding or farm work.

Comprehensive Vehicle Fitment

Product Specifications

OEM & Aftermarket Cross-Reference Information

What's Included

This kit includes the essential rings for a complete piston ring replacement on Suzuki 400 engines.

• 2 x Compression Rings (Top & Secondary)
• 1 x Oil Ring

Note: This list covers the ring-set components only. The piston, wrist pin, and circlips are not included unless explicitly stated by the seller. Related pistons and hardware may be available separately.

Why Choose This Aftermarket Replacement?

• Direct-Fit Compatibility: Precisely matched to 82.00 mm STD Suzuki LT-A400/LT-F400 engines for reliable sealing and easy installation.
• OEM Cross-Reference: Uses the genuine OEM reference 12140-38F10 as the standard ring set, ensuring compatibility with Suzuki service specifications.
• Premium Materials: Durable cast-iron rings designed to mirror factory standards, delivering reliable sealing in rugged trail and farm conditions.
• Performance Restoration: Reclaims compression and oil-control, reviving power and throttle response after wear.
• Value-Oriented Choice: A cost-effective replacement option that keeps your Suzuki 400 running reliably without the OEM price tag.
• Reliability in Tough Terrain: Built to withstand rugged trails and farm chores with consistent sealing and oil control.

Installation Notes:

• Cleanliness is critical: Thoroughly clean the piston grooves and cylinder bore before ring installation to prevent debris from scoring the walls.
• Correct ring orientation: Install the top compression ring and the secondary compression ring in the correct order and orientation as marked on the rings or in the service manual.
• Oil ring assembly: Ensure the oil ring rails and spacers are oriented as designed and seated flat; avoid any twisting during installation.
• Lubrication: Lightly coat the rings starting rails with engine oil or assembly lube before placing them on the piston to reduce friction on initial startup.
• Ring gaps: Check and set the end gaps according to the 82.00 mm bore standard specification; stagger gaps to reduce blow-by and ensure proper sealing.
• Ring compressor use: Use an appropriate piston ring compressor to seat rings into the bore without bending or nicking the rings.

Why Upgrade?

Running a worn piston ring set on a 82.00 mm Suzuki 400 engine invites blow-by, reduced compression, and inefficient oil control, which dulls performance and increases maintenance. Replacing with this STD ring set restores sealing, improves compression, and helps keep oil consumption in check for reliable operation on trails or farms.