# Piranha 140cc Engine fits Pit Bikes and other Minis

> This is a plain-text (markdown) copy of a page on tboltusa.com, made for AI assistants. People see the same page at the HTML link below.

- **Breadcrumbs:** [Home](https://tboltusa.com/store/index.md) > [Engines](https://tboltusa.com/store/engines-c-114.md) > [All Horizontal Pit Bike Engines](https://tboltusa.com/store/engines-all-horizontal-pit-bike-engines-c-114_1034.md) > Piranha 140cc Engine fits Pit Bikes and other Minis
- **Web page:** [this page on tboltusa.com](https://tboltusa.com/store/piranha-140cc-engine-fits-pit-bikes-and-other-minis-p-660.html)
- **Markdown:** [this page as markdown](https://tboltusa.com/store/piranha-140cc-engine-fits-pit-bikes-and-other-minis-p-660.md)
- **Generated:** 2026-11-10 11:50 EST
- **Site guide for AI assistants:** [llms.txt](https://tboltusa.com/llms.txt)
- **Your list:** To list everything you have looked at in one page, with current prices and stock, add ids to this address (comma separated, up to 20 of each): `https://tboltusa.com/store/seen.md?p=660`

All prices are in US dollars (USD). Shipping and any tax are worked out at checkout.

## Summary

- **Part number:** WHS-1143A
- **Price:** On sale: $529.00 USD (regular price $658.81 USD). (before options)
- **Stock:** In stock. This is a kit: the count is how many complete kits can be built from the parts on hand.
- **Reviews:** [30 reviews, average 5 of 5](https://tboltusa.com/store/reviews/piranha-140cc-engine-fits-pit-bikes-and-other-minis-pr-660.html)
- **Product id:** 660
- **Product last changed:** 2026-11-02

## Options

This product has options. Pick one value for every option. A value marked +$X adds that amount to the price; -$X takes it off.

### Clutch Cable

- No Clutch Cable: no price change: `choice/89-729`
- Clutch Cable TRC-0331: +$19.50: `choice/89-730`

### Clutch lever

- NO: no price change: `choice/114-825`
- YES: +$13.99: `choice/114-824`

### Exhaust Gasket

- None: no price change: `choice/101-773`
- Yes: +$3.00: `choice/101-621`

### Kickstarter

- stock: no price change: `choice/99-197`
- WHS-1722: +$51.69: `choice/99-764`

### Kill Button

- None: no price change: `choice/105-18`
- Kill Button, Yes Please: +$20.95: `choice/105-793`

### Shipping

The "Shipping" option is this heavy item's own flat shipping fee; it is added to the item.

- Flat Rate: +$85.00: `choice/8-26`

### Uni Air Filter

- No Air Filter: no price change: `choice/91-731`
- Uni Air Fliter: +$22.95: `choice/91-732`

## What it fits

The store lists a part under each bike or engine model it is meant for (the categories below) and may name models in the description. Do not assume it fits a bike or engine that is not named here; ask the store first.

- [Engines > All Horizontal Pit Bike Engines](https://tboltusa.com/store/engines-all-horizontal-pit-bike-engines-c-114_1034.md)
- [Engines > Motoped Engine options](https://tboltusa.com/store/engines-motoped-engine-options-c-114_927.md)
- [Engines > Piranha Engines](https://tboltusa.com/store/engines-piranha-engines-c-114_115.md)

Where a fitment line says "All", it means all years of the model named on that line, not all bikes.

## Notes the store shows with this product

**\*\*Signature required shipment\*\***

## Description (the store's own text)

This is the famous Piranha 140cc Engine, often referred to as the YX140cc. This is a super sturdy and very strong running engine. This is our ALL TIME best selling engine**.**

See picture for included parts. Engine available as pictured. We've had tremendous luck with this engine, and it's a great replacement engine or for builds & projects.

\*AMA RULE BOOK Eligible YX 1P56FMJ (140cc)
JR mini Class 2: 7-15 years old – 150cc Mini Speedway

**Engine Kit Includes:**

- Engine
- Intake
- CDI
- Coil
- Harness
- Kicker 16mm
- Shifter
- Carburetor
- 15T front drive sprocket

[Video](https://www.youtube.com/embed/VetkPLkxQ8Y)

Engine

- Displacement: 140cc
- Engine Type: Air Cooled, Single-Cylinder, 2-valve, 4-stroke
- Bore/Stroke: 56mm x 57mm
- Final Drive: Chain
- Fuel Delivery: Nibbi 19mm
- Fuel: Unleaded / 91 Octane
- Recommended Engine Oil: 10W-40 Petroleum Based (Nonsynthetic)

Ignition

- Kick Start: Yes (16mm)
- Electric Start: No
- CDI: Yes
- Auxiliary Output (lighting): Yes

Transmission

- Transmission: 4-Speed Manual 4-Up
- Shift-Pattern: Four-speed Transmission: N-1-2-3-4
- Clutch: Rear 5 plate manual

**For lighting setups:**

- Voltage regulator simple harness type 1 - TRC-0797
- Voltage regulator/rectifier 6V type 1 - TRC-0503
- Voltage regulator/rectifier 12V type 1 - TRC-0127

**Recommended for your application:**

**Tech:**

- Takes Keihin round jets series 99101-393 - TBW0327
- Takes Keihin 21 series pilot jets used in PJ, PWK, PD, and 20-32mm PE carbs - TBW0363

**Honda XR50/CRF50:**

- CRF50/XR50 tank spacer kit - TRC-1955
- Peg mount w/ pegs setup - TRC-4958
- Throttle cable - TBW0301

**Honda XR70/CRF70:**

- Peg mount with peg set up - TRC-4958
- Throttle cable - TBW0301

**Honda CT70:**

- Peg mount w/ pegs setup - TRC-4958
- Dual feed petcock for ATC70 CT70 Z50 - TBW0133
- CR type universal throttle 1/2 turn - W-70-1056
- T3 throttle cable for 20-28mm carb - TRC-1142

**Honda Z50:**

- TBparts race petcock for Z50 69-78 - TBW0355
- TBparts 12-way rotating spacer - TBW1487

**Honda ATC70:**

- Dual feed petcock - TBW0133

**Not Included:**

- Skid plates
- Exhaust
- Air filter
- Throttle Cable
- Clutch lever
- Clutch cable

**Note**: We suggest using an aftermarket exhaust to obtain maximum performance.

## More notes the store shows with this product

**IMPORTANT ENGINE STARTING INFORMATION**

- You may want to consider setting up the bike on a stand for a solid starting location at first until your confident
- Turn on Both Fuel and Choke
- DO NOT open the throttle (do NOT turn the throttle)
- Move the starter down until it gets stiffer, your looking for top dead center
- Let the starter come back up and give a full strong swift kick ALL the way thru
- REPEAT (If necessary)
- DO NOT KICK RAPIDLY
- When warm just do not use the choke

Flooded Engine:
IF your flooded , pull the plug, kick it over about 10 times WITH THE PLUG OUT
Put in a NEW PLUG

For ease of starting:
You may want to consider our TRC EZ START HIGH PERFORMANCE CDI
Part No. TRC-9745

One more thing:
At times it helps to just crack the throttle a *tiny* bit to let air in.

## Shipping and returns

- Flat rate shipping is $8 for parts orders under $75 and free for most parts orders over $75, within the continental 48 states. Heavy items (engines, complete bikes, suspension) are excluded.
- This item ships with its own flat fee: $85.00 USD.
- Full shipping policy: [Shipping policies](https://tboltusa.com/store/shipping-policies-i-6.md)
- Returns: the store's own policy page says how returns, exchanges and cancellations work. Please read it before buying: [Returns, Exchanges and Cancellations](https://tboltusa.com/store/returns-exchanges-and-cancellations-i-11.md) The page begins: "All products returned to T Bolt USA must be reviewed and approved."

## How to buy

For a person: open [Piranha 140cc Engine fits Pit Bikes and other Minis](https://tboltusa.com/store/piranha-140cc-engine-fits-pit-bikes-and-other-minis-p-660.html), choose any options, press "Add to Cart", then check out from the cart. Payment is only ever entered by the person, on tboltusa.com's own checkout pages.

For an AI assistant building a cart: `https://tboltusa.com/cart/new/item/660/choice/89-729/choice/114-825/choice/101-773/choice/99-197/choice/105-18/choice/8-26/choice/91-731/qty/1` starts one with this product (the first value of every option, qty 1), `https://tboltusa.com/cart/<cart_code>/add/item/660/choice/89-729/choice/114-825/choice/101-773/choice/99-197/choice/105-18/choice/8-26/choice/91-731/qty/1` adds it to a cart you already started, and `https://tboltusa.com/cart/<cart_code>/zip/<ZIP>` gives the shipping options to a US ZIP code. They answer JSON: give your customer the newest `cart_link`, a public cart link, safe to share.

To choose other values, swap in a `choice/` piece from the Options above; `qty/` sets the quantity. More products: add more `item/...` parts.

Or give the person one link that fills their own cart when they open it (a public cart link, safe to share; the first value of every option, qty 1): [Put Piranha 140cc Engine fits Pit Bikes and other Minis in my cart](https://tboltusa.com/cart/open/item/660/choice/89-729/choice/114-825/choice/101-773/choice/99-197/choice/105-18/choice/8-26/choice/91-731/qty/1)

Payment: all major credit cards, PayPal, Apple Pay and Google Pay. Money orders by arrangement.

Cart: [Shopping cart](https://tboltusa.com/store/shopping_cart.php)

## Photos

- [Photo 1](https://tboltusa.com/store/img/p/660/piranha-140cc-engine-fits-pit-bikes-and-other-minis-1.03160fa1.jpg)
- [Photo 2](https://tboltusa.com/store/img/p/660/piranha-140cc-engine-fits-pit-bikes-and-other-minis-2.4cd81c05.jpg)
- [Photo 3](https://tboltusa.com/store/img/p/660/piranha-140cc-engine-fits-pit-bikes-and-other-minis-3.e9a6dce5.png)

## Support

Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online [Pit Bike Technical Info Database](https://tboltusa.com/store/tbolt-usa-pit-bike-minimoto-technical-info-database-tech-15.md)!

We have all necessary support parts on hand.

*Most* orders ship same, or next business day, unless otherwise noted above.