• Building a cutaway GY6 model - Spins over by hand, valves actuate

  • Can you tell good performance advice (from snake oil advertising) when you see it? There are many GY6 performance myths invented by sellers, meant to part you from your hard earned money. It may sound good, but is it tested?

    Ask your engine upgrade questions here. We'll provide tested answers.

    We're building our own GY6 DYNO (dynamometer) with full CNC control! Subscribe to the dyno build thread to stay updated!
November 2019 Forum Retirement
Due to lack of extra personal time (and too much spam), I'm retiring the forum and setting it to a read-only state. No new registrations or posts will be accepted as of 11/09/19. However, all information will stay up and searchable. If you spend a few minutes searching, you'll find the answers you're looking for. We may re-open the forum next spring.
Can you tell good performance advice (from snake oil advertising) when you see it? There are many GY6 performance myths invented by sellers, meant to part you from your hard earned money. It may sound good, but is it tested?

Ask your engine upgrade questions here. We'll provide tested answers.

We're building our own GY6 DYNO (dynamometer) with full CNC control! Subscribe to the dyno build thread to stay updated!
 #12815  by Travis @ Buggy Depot
 Sat Sep 08, 2018 10:08 pm
I'm building this model for a local demonstration. In case you're curious to see inside where all the bang happens, this is what the GY6 150cc looks like inside the combustion chamber with a good look at the rotating assembly.

- Cylinder cutaway
- Cam chain slot cut
- No left-side crankcase
- Outer valve springs removed to reduce resistance

It's a "working" model. Spins over by hand, and valves actuate in time. Will later produce real spark and show "fuel" injection events. Thought I'd share (y)

Image

Image

Image

Image

Image
Attachments
IMG_6504.jpg
IMG_6505.jpg
IMG_6513.jpg
IMG_6516.jpg
IMG_6518.jpg