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Summary

In this exciting DIY project, the creator embarks on an adventurous journey to install a 350W motor into an MT09, enhancing its performance with a custom gearing system. Facing challenges like ensuring the wheels can withstand the new power and adjusting the motor's alignment for optimal chain tension, the creator meticulously adapts a bicycle's derailleur to achieve seamless gear shifts. Despite initial setbacks, including a chain mishap and alignment issues, perseverance leads to a triumphant moment as the modified MT09 reaches speeds over 26 km/h. This video not only showcases the technical prowess involved in motor installation and modification but also the thrill of pushing DIY boundaries to achieve remarkable results.

Takeaways

• 🚗 The project focuses on installing a 350w motor into an MT09, testing its compatibility and performance.
• 💡 The motor, weighing 2.8kg and rotating at 450 RPM, came with a throttle, charger module, and required a separately purchased battery.
• 🔨 Challenges included the heavy axle making it hard to turn, indicating a high gear reduction beneficial for the motor's torque.
• 🛠 Adaptation concerns arose regarding the chain potentially hitting the frame due to the motor's positioning, but adjustments ensured a good fit without extra modifications.
• 🔥 A major decision involved selecting the right size sprocket to balance speed and torque, leading to the innovative idea of creating a multi-gear sprocket to optimize performance.
• 📈 Through trial and error, including modifying bicycle cassettes for the project, the final setup featured a custom sprocket system to improve speed and manageability.
• 🚜 Mechanical challenges such as aligning the motor, ensuring the chain did not interfere with movement, and securing the motor mount were addressed through creative engineering solutions.
• 🔧 The video documents the iterative process of testing and adjusting components like the chain tension, alignment, and gear settings to achieve optimal performance.
• 💧 The project successfully overcame obstacles like chain alignment and motor mounting issues, leading to a significant improvement in the bike's speed and overall functionality.
• 🏁 The final tests demonstrated the bike's ability to exceed 20km/h, with a top speed of 26km/h, marking the project as a success and showcasing the potential for further modifications and improvements.

Q & A

What kind of motor is Henry installing on the MT09 motorcycle?

Henry is installing a 350W electric motor that weighs 2.8 kg and spins at 450 RPM. It came with a throttle and charging module but he had to buy the battery separately.

Why does Henry say it's good that the motor axle is very heavy?

A heavier motor axle means the gear reduction is higher, so there will be more torque output to help move the motorcycle, especially from a standstill.

What is Henry's idea for adding multiple gears to the motor?

Henry decides to make a custom 4-gear sprocket assembly using bicycle freewheel cogs to have better acceleration from a stop and also a good top speed.

What speed is Henry hoping to reach with the 14 tooth rear cog?

Henry hopes the 14 tooth rear cog will allow the motorcycle to reach over 21 km/h (13 mph).

What problem causes the chain to keep breaking during testing?

The custom sprocket assembly is not properly aligned, causing the chain to bind and break.

How does Henry fix the issue of the motor continuing to spin when he stops accelerating?

He replaces the fixed sprocket with a freewheel, so it disengages from the motor when he stops accelerating, allowing the bike to coast.

What top speed does Henry reach in the final test?

In the final test, Henry reaches 26 km/h (16 mph) which he says feels very fast on the small motorcycle.

Why does the tire get damaged during testing?

The tire gets worn from repeated acceleration tests before Henry is able to properly align the drivetrain components.

What does Henry use the derailleur for in the final design?

He removes the lower jockey wheel and uses just the top section as a chain tensioner.

What ideas does Henry have to continue the MT09 project?

He says he has more ideas to keep modifying the MT09 motorcycle and viewers can suggest ideas as well.