# Pit Bike Engine Size & 50/70 Engine Size

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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

Pit Bike engines are based on Honda 70 type engines

These engines are currently in Honda CRF50 , CRF70 bikes
The 2 main motor mounts and bottom 4 mounting points(pegmounts) are the SAME on all Pit Bike Engines
Pit bike Engines fit in All China Pit bikes and Most older / current Honda bikes with horizontal OHC engines (NOT KLX110 or DRZ110)
Major sizing differences are
1) 90-110cc is 9mm taller at the head due to longer cylinder
2) 120-UP are 15mm taller due to longer Cylinder
3) the CRF50 has a recess in the Clutch cover to allow the bottom pegmount , Pit bike engines do not
But there are many simple bolt on Pegmonts that can be installed

This is a sizing diagram for Lifan 50-70cc - Same as CRF50/70

![Engine size DR](https://tboltusa.com/store/images/Pit_bike_engine_size_DR.jpeg)

#### Motor Mount info:

![image](https://tboltusa.com/Tech_Data/uploads/images/90CC.JPG)

![top view](https://tboltusa.com/store/images/topview_pitbike_motor_size.jpg)

![bottom view](https://tboltusa.com/store/images/Bottom_Pitbike_motor_sizing.jpg)

![cylinder legnth](https://tboltusa.com/Tech_Data/uploads/images/PIRANHA150ccPITBIKEENGIN_1.jpg)

**Pit bike Engines are approx 11in Wide (280mm)**

## 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)