Wiseco Forged Series Piston Kit with Gaskets - Honda ATC185/ATC200 Series (1980-1986) - 65.50mm Bore (Oversize) - 4-Stroke
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Wiseco Forged Series Piston Kit with Gaskets - Honda ATC185/ATC200 - Oversize
Premium Wiseco Forged Series piston kit with complete gasket set for vintage Honda ATC185 and ATC200 series three-wheelers. This is an OVERSIZE (65.50mm) kit!
⚠️ Important Fitment Notes
- ATC200 models (1982-1986): +0.50mm oversized piston
- ATC185/ATC185S (1980-1983): +0.080" overbore (+2.50mm) - requires cylinder boring
Kit Includes
- Forged Series Piston
- Ring Set
- Wrist Pin
- Wrist Pin Retainer Set
- Complete Gasket Kit
Key Features
- Forged Series - premium 2618 aluminum alloy construction
- 10.25:1 compression ratio
- Complete top-end gasket kit included
- Fits multiple vintage ATC three-wheeler models
Piston Specifications
- Bore Size: 65.50 mm
- Piston Diameter: 65.45 mm
- Stroke Length: 57.80 mm
- Compression Ratio: 10.25:1
- Material: 2618 Aluminum Alloy
- Skirt Coating: Non-Coated
Engine Specifications
- Displacement: 191.8cc
- Engine Type: 4-Stroke
- Weight: 0.85 lbs
Fitment
- Honda ATC200S: 1984-1986 (+0.50mm oversize)
- Honda ATC200M: 1984-1985 (+0.50mm oversize)
- Honda ATC200ES: 1984 (+0.50mm oversize)
- Honda ATC200E: 1982-1983 (+0.50mm oversize)
- Honda ATC185S: 1981-1983 (+2.50mm oversize, boring required)
- Honda ATC185: 1980 (+2.50mm oversize, boring required)
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
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