Coleman CT100U Throttle Stop Governor Removal & Top Speed - How To Bypass

Published on January 26, 2021
Duration: 4:43

This guide details how to bypass the throttle stop governor on a Coleman CT100U mini bike to increase top speed. The process involves either bending or cutting a small portion of the throttle stop component to allow the carburetor to open fully, achieving a top speed in the low to mid 30s from a stock 19-20 mph. The video emphasizes that removing the return spring is unnecessary and can hinder proper operation.

Quick Summary

Bypassing the throttle stop on a Coleman CT100U involves bending or cutting the stop component to allow the carburetor to fully open. This modification can increase the mini bike's top speed from approximately 19-20 mph to the low to mid 30s. The internal governor remains active, preventing dangerous over-revving.

Chapters

  1. 00:00Introduction & Throttle Stop Overview
  2. 00:14Identifying the Throttle Stop
  3. 00:37Initial Modification (Cutting)
  4. 01:14Spring Behavior and Limitations
  5. 01:40Achieving Full Throttle Opening
  6. 02:48Proper Throttle Stop Adjustment
  7. 03:05Confirming Full Throttle
  8. 03:18Top Speed Increase Expectation
  9. 03:41Conclusion & Future Mods
  10. 03:48Governor Removal vs. Throttle Stop Bypass

Frequently Asked Questions

How do I bypass the throttle stop on a Coleman CT100U?

To bypass the throttle stop on a Coleman CT100U, you can either bend the throttle stop component backward or cut off a small portion (around 3-4mm). The goal is to allow the carburetor to fully open, which is a limited amount of travel.

What is the top speed increase after bypassing the throttle stop on a CT100U?

Bypassing the throttle stop on a stock Coleman CT100U can increase its top speed from the original 19-20 mph to the low to mid 30s. This modification allows the engine to reach higher RPMs by enabling full throttle opening.

Do I need to remove the throttle return spring when bypassing the throttle stop?

No, removing the throttle return spring is not necessary and not recommended for bypassing the throttle stop on a Coleman CT100U. The spring helps the throttle return properly, and adjusting the stop itself is sufficient for increased throttle opening.

Will bypassing the throttle stop cause the engine to over-rev?

Bypassing the throttle stop does not remove the engine's internal governor. The governor will still limit the engine's RPMs to prevent over-revving and potential damage. Full governor removal requires additional engine upgrades.

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