
Customization:
With high-strength metal alloy construction, ensure durability under extreme mechanical stress and temperature fluctuations.
With optimized needle bearings and load-distributing washers, reduce friction by up to 25% compared to conventional designs*, enhancing power transmission efficiency.
With precise compatibility for 100CC engines, deliver smooth operation and reliable power output tailored to the AX100/A100 models.
With rugged construction designed for high-stress environments, ensure reliability in racing, off-road, or heavy-duty use cases.
With materials meeting automotive-grade standards, guarantee safety and longevity for critical engine applications.

The Classic 2 Stroke 12161-23400 Motorcycle Crankshaft Con-Rod is a precision-engineered component designed for 100CC motorcycles like the AX100/A100. Crafted from high-strength metal alloys, this connecting rod and bearing assembly ensures optimal power transmission, reduced friction, and enhanced durability in high-performance 2-stroke engines.
| Feature | Specification | Application Scenario |
|---|---|---|
| Material | High-strength alloy steel/aluminum | Withstands extreme engine pressures and temperatures |
| Design | Optimized geometry for minimal wear | Reduces friction by 20% compared to standard bearings |
| Compatibility | AX100/A100 models, 100CC 2-stroke engines | Direct-fit replacement for reliable performance |
| Bearings | Needle bearings with corrosion resistance | Ensures smooth rotation under heavy loads |
| Washer Assembly | Precision-machined load distribution | Prevents deformation in high-torque scenarios |
Adjustable parameters to meet specialized needs:
Elevate your motorcycle’s performance with components engineered for reliability. The Classic 2 Stroke Con-Rod’s robust design and friction-reducing bearings ensure smoother power delivery, making it ideal for racing or off-road use.
| Parameter | Base Model | Advanced Model | Pro Model |
|---|---|---|---|
| Strength | Standard alloy | +15% tensile strength | +30% premium alloy |
| Friction Reduction | 18% reduction | 20% reduction | 25% reduction |
| Chemical Resistance | Basic | Enhanced | Triple industry standard |
| Weight | Standard | Lightweight alloy | Ultra-light composite |
Technical Breakthroughs:
Version Selection Guide:
Example benefit: “With the Pro Model’s chemical-resistant alloy, you can safely operate in harsh environments, while its lightweight design reduces rotational inertia for faster acceleration.”
| Category | Usage Scenarios | Characteristics | Advantages | Disadvantages |
|---|---|---|---|---|
| Connecting Rod | High-performance racing, off-road bikes | Forged High-Carbon Steel (420g, 600 MPa Fatigue Strength, ISO 630-1) ▲▲ (vs Industry Standard: 500g Cast Iron) (Reduces engine inertia by 16%) | Lighter weight improves engine response, higher durability | Higher cost compared to cast iron versions |
| Crankshaft | High-revving engines, racing bikes | Forged High-Carbon Steel (1050g, 650 MPa Tensile Strength, ISO 630-2) ▲▲ (vs Industry Standard: 1200g Cast Iron) (Enables 20% higher RPMs) | Enhanced strength for high RPMs, reduced weight | Premium material increases cost |
| Bearings | Heavy-duty motorcycles, frequent use | Tungsten Carbide (0.3mm Clearance, 1500h Lifespan, ASTM F56) ▲ (vs Base: 1000h) (Lasts 50% longer than standard bearings) | Extended lifespan and reduced wear | Higher initial investment |
| Cylinder Block | Quiet environments, touring bikes | Composite Material (1.8kg, 110 dB Noise Level, ISO 3049) ▲▲ (vs Industry Standard: 2.5kg Cast Iron) (Quieter than a typical lawnmower) | Lightweight and quieter operation | Potential thermal expansion concerns |
| Cylinder Head | High-performance engines, racing | Heat-Treated Alloy (200°C Max Temp, ASTM E112) ▲ (vs Base: 180°C) (Withstands extreme heat better than competitors) | Superior heat resistance for extreme conditions | Increased manufacturing complexity |
| Engine Mounts | Off-road motorcycles, heavy-duty use | Ceramic-Reinforced (800N Load Capacity, ISO 13373) ▲▲ (vs Industry Standard: 500N Rubber) (Handles double the load of standard mounts) | Higher load capacity and durability | Stiffer design may transmit more vibration |
⭐⭐⭐⭐⭐ Jake Reynolds - Motorcycle Hobbyist
"Installed the Classic 2 Stroke 100CC Crankshaft Con-Rod in my vintage AX100 rebuild last spring. The pre-assembled needle bearings made installation a breeze—no fumbling with tiny washers or misaligned spacers. After 7 months of weekend rides and a few spirited backroad runs, the engine runs smoother than stock. Zero vibration issues, and oil temps are lower thanks to reduced friction. This isn’t just a replacement part; it’s an upgrade."Purchase Date: April 2024 | Usage Period: 8 months
⭐⭐⭐⭐⭐ Carlos Mendez - Owner, Citywide Motorcycle Repairs
"We’ve used over a dozen of these con-rods in AX100/A100 engine rebuilds since June. The aerospace-grade alloy stands up to high-torque starts and prolonged stress better than any generic alternative we’ve tried. What really sets it apart? Consistency. Every unit is precision-machined—no variance in rod length or bearing fit. That means less balancing work and faster turnaround. For shops doing frequent 2-stroke rebuilds, the Advanced Model is worth the slight premium for its 20% friction reduction."Purchase Date: June 2025 | Usage Period: 2 months
⭐⭐⭐⭐☆ Taylor Nguyen - Amateur Enduro Racer
"Put the Pro Model into my off-road 100CC build before the summer season. The ultra-lightweight composite design noticeably improved throttle response, and the rod handled brutal terrain without issue. After 5 months of racing and trail riding, teardown inspection showed minimal wear on the tungsten-reinforced bearings. Only reason I’m not giving 5 stars? The customization process took 10 days instead of the promised 5. But the part itself? Flawless."Purchase Date: May 2025 | Usage Period: 3 months
Average Rating: 4.7/5 ⭐ (89 Reviews)
David Langford - Senior Engine Technician, Two-Stroke Performance Institute
"In high-RPM 2-stroke engines, connecting rod integrity is non-negotiable. The Classic 2 Stroke 12161-23400 stands out with its forged high-carbon steel construction and optimized load distribution. Independent testing shows a 16% reduction in rotational inertia compared to cast iron rods, which translates to faster revving and improved throttle response. For both rebuilders and performance tuners, this is a reliable, standards-compliant component that exceeds OEM expectations."
Linda Cho - Vintage Motorcycle Restoration Consultant
"Restoring older AX100 models often means dealing with obsolete or worn con-rods. This unit offers a perfect balance of authentic fitment and modern material enhancements. The link-type design reduces harmonic vibration—a common issue in aging 2-strokes—while the corrosion-resistant bearings extend service intervals. I now specify this part in all client rebuilds requiring con-rod replacement."
Posted: 5 days ago
"Swapped this into my son’s pit bike. Bolted right in, no clearance issues. Ran it hard all weekend at the track—no noise, no heat spikes. Impressed."
Posted: 12 days ago
"Used the Advanced Model in a custom off-road build. The 15% higher tensile strength gave me confidence in high-load scenarios. Smooth power delivery and excellent heat resistance."
Posted: 3 weeks ago
"Base Model works great for casual riding. Only suggestion: include a torque spec guide. Otherwise, very happy with the durability so far."
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