# 4 Stroke Ring Stack

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- **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/stroke-ring-stack-tech-65.html)
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- **Generated:** 2026-11-15 03:55 EST
- **Site guide for AI assistants:** [llms.txt](https://tboltusa.com/llms.txt)

This is an article from the TBolt USA Tech Database, the store's free online library of pit bike technical info. The text below is the article as written.

## Article

Top to bottom
\1. Top ring is the Compression Ring (usually shiny side) "will have a Dot or letter" stamped on it (faces up)

\2. Middle Ring is the oil scraper (Thick black) "will have a Dot or letter" stamped on it (faces up)

\3. (3) Oil rings actually 2 thin and 1 ridged (wavy)

Bottom to Top

1 - expander ring - (wavy one) - lower groove
2 - lower oil ring - below above ring in lower groove
3 - upper oil ring - above expander ring in lower groove
4 - install the black one in the center groove
5 - Install the silver one in the top groove (markings on ring should face up)

**END GAPS: Set top ring gap 180 deg at the wrist pin , then evenly spaced at one third intervals \*Make sure the end gaps of the piston ring are not aligned with one another -evenly space apart or will smoke Helpful VIDEO LINK: [youtube.com/watch](https://www.youtube.com/watch?v=Z0m30JLNbaA&t=338s) https:/**
![Image: https://tboltusa.com/store/images/ring-stack.png](https://tboltusa.com/store/images/ring-stack.png)

## Tech Database sections

- [Tech Database home](https://tboltusa.com/store/tbolt-usa-pit-bike-minimoto-technical-info-database-tech-15.md)
- [Pit bike Buying and Ownership info](https://tboltusa.com/store/pit-bike-buying-and-ownership-info-tech-98.md)
- [Pit Bike Wiring Info](https://tboltusa.com/store/pit-bike-wiring-info-tech-56.md)
- [General Motorcycle Maintenance](https://tboltusa.com/store/general-motorcycle-maintenance-tech-95.md)
- [General Motorcycle Troubleshooting](https://tboltusa.com/store/general-motorcycle-troubleshooting-tech-97.md)
- [How Things Work](https://tboltusa.com/store/how-things-work-tech-115.md)
- [Identifying Parts, Bikes, and Engines](https://tboltusa.com/store/identifying-parts-bikes-and-engines-tech-96.md)
- [Parts Diagrams and Breakdowns](https://tboltusa.com/store/parts-diagrams-and-breakdowns-tech-120.md)
- [Pit Bike Installation Info](https://tboltusa.com/store/pit-bike-installation-info-tech-99.md)