answersLogoWhite

0


Best Answer

The powervalve is a quarter moon shaped plate that rests on the top of the exhaust port. when the engine hits a certain rpm the plate slides back which advances the port timing. Advanced port timing yeilds more top end power, and retarded timing (later timing) gives better bottom end power.

User Avatar

Wiki User

16y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What do the power valves on a KTM 125SX do?
Write your answer...
Submit
Still have questions?
magnify glass
imp