[Hot Item] CNC Machining Motorcycle Engine Parts Racing Camshaft for YAMAHA

Motorcycle part cam shaft is a part of piston engine. The function is to control the opening and closing action of engine valve. Usually it's speed is very high, but need to bear large torque, so in terms of strength and support, the material of cam shaft is high quality alloy steel or alloy steel. It can be said that cam shaft plays a very important role in engine design.
Advantages Of Motorcycle Camshafts:
1. Multi-Cam Design
2. High Strength And Wear Resistance
3. Cam Shape Design
4. Camshaft Phase Adjustment Function
5. Lightweight Design
Overall, The Beauty Of Motorcycle Camshafts Lies In Their Significant Impact On Engine Performance, Combustion Efficiency, And Driving Experience. By Optimizing The Design And Selection, the motorcycle's Power Output, Fuel Economy, And Ability To Adapt To Different Driving Needs Can Be Improved.

1.ISO9001-2008.
2.Has advanced euipment and over 15 years experience.
3.price: competetive price , Precision made.Experience & Reasonable QC that you can reply on.
4. Process: Precision made.Experience & Reasonable QC that you can reply on Each part would
be given 100% test and tryout before shipment.
5. Adequate supply capacity. Punctual delivery time.

1. High skilled and well-trained working team under good management environment;
2. Quick response and support for any inquiries;
3. Over 10 years professional manufacture experience to ensure high quality of your products;
4. Large and strong production capacity to meet your demand;
5. High Quality standard and hygienic environment;
6. We have very strict quality control process:
a. In coming Quality control (IQC) - All incoming raw material are checked before used.
b. In process quality control (IPQC) - Perform inspections during the manufacturing process.
c. Final quality control (FQC) - All finished goods are inspected according to our quality standard for
each products.
d. Outgoing Quality Control (OQC) - Our QC team will 100% full inspection before it goes out for shipment.
7. Good after sales services.

Range Of Motorcycle Parts:
YAMAHA, SUZUKI, BAJAJ, TVS, SHINERAY, JIALING, HAOJUE, HAOJIANG, SUKIDA, SENKE, ZS, GENESIS...

How to order :
* You send us drawing or sample
* We carry through project assessment
* We give you a design
* You think the design is ok
* We make the sample and send it to you
* You think the sample is good then place an order and pay us 30% deposit
* We start to make the product

3D instruments, 2D instruments, Projectors, Height Gauges, Inner diameter dial indicators, Dial gaues,
Thread and Pin gauges, Digital calipers,Micro calipers, Thickness testers, Hardness testers Roughness
testers, etc.( Detection accuracy to 0.001 millimetre )

Packing:
1: Shrink film+ bulk loading
2: Shrink film +Carton box + Pallet/ wooden case
3: PP + Wooden case
4: As per customers' requirements or negotiated

Q1: What is a valve rocker arm?
A: A valve rocker arm is a critical component in the valvetrain of an internal combustion engine. It is a lever that converts the rotational motion of the camshaft (or the linear motion of a pushrod) into a downward, opening force on the engine's intake or exhaust valves. It serves as a bridge between the camshaft and the valve stem.

Q2: What is the primary function of the rocker arm?
A: Its primary functions are to:

1. Transfer Motion: Transmit the cam lobe's profile movement to the valve.

2. Amplify Lift (Optional): In many designs, the rocker arm acts as a lever with a specific pivot point to increase (or sometimes decrease) the valve lift compared to the cam lobe's lift.

3. Reverse Direction: Change the direction of force-typically from an upward-moving pushrod or follower to a downward-moving valve.

Q3: What are the main types of rocker arms?
A: The main types are categorized by their drive mechanism:

1. Stamped Steel Rocker Arms: Used in classic pushrod engines (OHV - Overhead Valve). They are affordable, lightweight, and pivot on a central "rocker shaft."

2. Roller Rocker Arms: Feature a small roller bearing at the point of contact with the cam lobe or valve stem tip. This reduces friction, wear, and heat, allowing for higher RPM and more aggressive cam profiles. They can be made from stamped steel, aluminum, or steel billet.

3. Shaft-Mounted Rockers: Several rockers (for multiple cylinders) are mounted on a single, long shaft. Common in many inline engines.

4. Pedestal-Mounted (Stud-Mounted) Rockers: Each rocker arm pivots on its own individual stud, which is threaded into the cylinder head. Adjustment is often done via a nut on the stud.

5. Finger Followers (Bucket Tappets with Levers): Used in many modern DOHC (Dual Overhead Cam) engines. They are pivot levers acted upon directly by the camshaft and are more compact than traditional rockers.

Q4: What materials are rocker arms made from?
A: Common materials include:

• Stamped Steel: Low cost and durable for standard applications.

• Cast Iron/Steel: For heavy-duty applications.

• Aluminum Alloy (Billet or Forged): Lightweight, excellent for performance engines to reduce valvetrain mass. Often used with needle bearing pivots.

• Composite Materials: In some experimental or high-efficiency designs.

Q5: What are the signs of a failing rocker arm?
A: Symptoms include:

1. Ticking or Clicking Noise: A persistent, rhythmic tapping from the valve cover, often indicating excessive clearance, wear, or lack of lubrication.

2. Loss of Engine Power: If a rocker arm breaks or slips, the corresponding valve will not open properly, leading to misfires and power loss.

3. Check Engine Light: May illuminate with codes related to misfires or camshaft position correlation.

4. Visible Metal Debris: In the oil or around the valvetrain, indicating severe wear or breakage.

Q6: How is valve lash/adjustment related to the rocker arm?
A: Valve lash is the precise clearance between the rocker arm's contact point and the valve stem (or between the rocker and pushrod). This clearance is critical for proper engine operation.

• Too much lash: Causes noise, reduces valve lift/duration, and can cause impact damage.

• Too little lash: Prevents valves from fully closing, leading to compression loss, burnt valves, and power loss.
  Rocker arms on adjustable systems use a screw and locknut mechanism for precise lash setting. Many modern engines use hydraulic lash adjusters (HLAs) or self-adjusting mechanisms integrated into the rocker arm or follower.

Q7: What is a roller rocker, and what are its benefits?
A: A roller rocker has a small roller bearing at its tip where it contacts the valve stem (and sometimes at the pushrod cup). Benefits include:

• Reduced Friction: Significantly lowers valvetrain friction, improving horsepower and fuel efficiency.

• Reduced Wear: Extends the life of the cam lobe, lifter, and valve tip.

• Higher RPM Potential: Allows the use of stiffer valve springs and more aggressive cam profiles without scuffing.

• Quieter Operation: Can reduce valvetrain noise.

Q8: Can I upgrade my stock rocker arms?
A: Yes, in many performance-oriented pushrod (OHV) engines, upgrading to higher-ratio roller rocker arms is a common modification.

• Higher Ratio: A rocker arm with a ratio greater than stock (e.g., 1.6:1 instead of 1.5:1) increases valve lift for more airflow, potentially boosting power without changing the camshaft.

• Material Upgrade: Switching from stamped steel to aluminum roller rockers reduces valvetrain mass, allowing for higher, safer RPM limits.
  Important: Upgrades require careful checking for proper clearance (coil bind, piston-to-valve) and often necessitate corresponding upgrades to valve springs and pushrods.

Q9: How do rocker arms relate to Variable Valve Timing (VVT) systems?
A: In engines with VVT, the rocker arm itself is often part of a more complex mechanism. Some systems (like VTEC) use two different cam lobe profiles. A specialized rocker arm contains a locking pin that, when activated, switches which cam lobe acts on the valve, changing lift and duration. The rocker becomes an active, switchable component in the VVT system.

Q10: What's the key difference between a rocker arm in an OHV engine vs. an OHC engine?
A:

• In an OHV (Pushrod) Engine: The rocker arm is a long, prominent lever. It is actuated by a pushrod from the camshaft in the engine block. Its primary role is to reverse and often amplify the upward pushrod motion.

• In an OHC (Overhead Cam) Engine: The rocker arm (or finger follower) is typically shorter. It is actuated directly by the overhead camshaft. Its role is more about transferring the cam's motion efficiently, often without a significant ratio change, and may incorporate hydraulic lash adjusters.