ทำเวฟ125 เป็น326cc. 76/4valve (SUBTITLE) #wave

เสื้อสูบอัลลอย HERCULES

27 Jan 202416:57

Summary

TLDRThe video documents the process of custom building a 326cc racing engine for a customer in Vietnam. It shows welding an extended stroke crankcase, machining it to fit a larger 76mm piston, adapting parts from various Honda bikes, and test fitting the engine. Details are provided on technical specifications like increasing the stroke length 14mm to 126mm. The goal is creating a high-revving, high-horsepower engine for motocross racing by utilizing a mix of components from the builder's experience and the customer's requests.

Takeaways

😊 The customer is located in Vietnam and ordered an custom engine build
🔧 The build combines parts from various Honda motorcycles to create a high-performance engine
⚙️ The crankshaft stroke length was increased by 14mm for more power
👷 Welding and machining is required to join the Yamaha cylinder block to the Honda crankcase
🛠 The cylinder block is from an Exciter air-cooled engine
⛏ The engine displacement is increased to 326cc
📏 Precise measurement is needed to align the crankshaft center line when welding sides
🧰 Edge chamfering of cylinder bore done to ease piston ring insertion
🚗 The finished engine has smooth crank rotation
✈️ The custom 326cc engine was shipped overseas to the customer in Vietnam

Q & A

What parts are being combined to create this custom engine?
-A Hercules alloy cylinder block, Yamaha upper end, Honda Wave 125 crankcase, 76mm piston, extended stroke crankshaft, RXZ connecting rod, and Exciter cylinder block for the air pump.
What is the purpose of welding the crankcase?
-To extend the stroke length by 14mm total to match the custom 76mm piston.
How is the front center found when welding the crankcase?
-By attaching the welded crankcase to the original crankcase and finding the center from that side before cutting.
Why use an air pump cylinder block?
-An air pump cylinder block doesn't use water for cooling. It relies on air flowing over cooling fins instead.
What is the total engine displacement?
-326cc
What modifications were made to the crankcase foot?
-It was concaved so the foot protrudes deeper in order to better support the 76mm piston.
What was the purpose of removing sharp edges from the cylinder jacket?
-To allow the piston rings to be inserted more easily.
How is the cooling achieved in this engine?
-Through air flowing over cooling fins rather than water.
When was the custom engine sent to the customer?
-It had already been sent by the time the video was posted.
What brands were used in creating this custom engine?
-Hercules alloy, Yamaha, Honda Wave 125, and Exciter.

Outlines

00:00

😀 Introducing the Frankenstein Engine Build

The paragraph introduces the project of combining a Hercules alloy cylinder block with a Yamaha upper engine part to create a custom engine for a Honda Wave 125 motorcycle. It provides background on the customer in Vietnam and the specific components being used.

05:06

😊 Assembling the Crankcase and Cylinder

The paragraph describes the process of assembling the welded crankcase and attaching it to the original crankcase to find the front center. It mentions using an Exciter cylinder block and increasing the stroke length to 326cc.

10:56

🤔 Machining the Cylinder Jacket and Crankcase

The paragraph details machining the cylinder block to match the increased stroke length. It also describes concaving the casing foot to support the 76mm piston used. The sharp edges are smoothed to enable easy piston ring insertion.

15:58

😃 Shipping the Completed Custom Engine to Vietnam

The concluding paragraph notes that the custom engine has been shipped to the customer in Vietnam. It thanks the viewer and provides contact information.

Mindmap

Keywords

💡Cylinder block

The cylinder block is one of the main engine components, forming the outer shell of the cylinder. In this video, the narrator mentions using an air pump cylinder block, which uses air fins for cooling instead of water.

💡Crankcase

The crankcase is the housing that contains the crankshaft and connects the cylinder block to the transmission. In the video, the narrator welds an extended crankcase to increase the stroke length and engine displacement.

💡Stroke

The stroke is the distance the piston travels up and down inside the cylinder. The narrator increases the stroke length by 14mm to 326cc total displacement for more power.

💡Piston

The piston slides up and down inside the cylinder, transferring force from expanding gases to the crankshaft. A 76mm piston is used in this custom engine build.

💡Crankshaft

The crankshaft converts the reciprocating motion of the pistons into rotational motion to drive the motorcycle. The narrator uses an extended "RZX" crankshaft with increased stroke length.

💡Cylinder head

The cylinder head sits above the cylinder block and contains the valves and spark plug. An "Exciter" cylinder head is used in this engine build.

💡CC

CC stands for cubic centimeters, a measure of engine displacement or volume swept by the pistons. The custom engine build has a displacement of 326cc.

💡Connecting rod

The connecting rod connects the piston to the crankshaft, transmitting power to rotate the crank. An "RXZ" connecting rod is used with the stroked crankshaft.

💡Casing foot

The casing foot is the extended base of the cylinder block which supports and centers the piston. The narrator machines this area to fit the larger 76mm piston.

💡Welding

Welding is used to permanently join metal parts like the custom crankcase. The narrator welds an extension to increase engine stroke and displacement.

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