Minibike Performance Modifications

The video explores modifications to a minibike to increase its speed. Initially, the minibike achieved 44.61 mph by changing the rear sprocket. The video then discusses the potential impact of advancing the timing with a 7-degree key in the flywheel. After installing the advanced key, speed tests show a slight increase to 44.80 mph, with improved throttle responsiveness. The modification is deemed worthwhile for its cost, enhancing both speed and low-end torque.

What was the initial speed of the minibike before any modifications?

• 44.61 mph

• 44.80 mph

• 45.00 mph

• 44.69 mph

What change was made to the rear sprocket to increase the minibike's speed?

• From 35 to 45 teeth

• From 45 to 35 teeth

• From 50 to 40 teeth

• From 40 to 50 teeth

What is the purpose of installing a 7-degree advanced key in the flywheel?

• To decrease the engine's power

• To advance the timing

• To increase the engine's weight

• To reduce fuel consumption

What was the keyway type before the modification?

• 7-degree advanced keyway

• Factory standard keyway

• 10-degree advanced keyway

• 5-degree advanced keyway

What was the expected outcome after installing the 7-degree advanced flywheel key?

• Decrease in speed

• No change in performance

• Increase in top speed and throttle responsiveness

• Increase in fuel consumption

What was the new top speed achieved after the modification?

• 44.80 mph

• 44.61 mph

• 44.69 mph

• 45.00 mph

How did the minibike's throttle responsiveness change after the modification?

• It became unpredictable

• It became less responsive

• It remained the same

• It became more responsive

What was the main benefit of the modification besides the increase in top speed?

• Improved fuel efficiency

• Enhanced low-end torque

• Increased weight

• Reduced engine noise

How much did the modification cost?

• A few dozen dollars

• A couple of bucks

• Several thousand dollars

• A few hundred dollars

Was the modification considered worthwhile?

• It was too expensive

• No, it was not worth it

• Yes, it was worthwhile

• It had no effect