Piranha 140cc Engine
fits Pit Bikes and other Minis

Vital Information
Price	$549.00
Part No	WHS-1143
Location	545A
Stock Level	6 Left
Choose Options

**Signature required shipment**

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

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:

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.

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.

Available Options:

Clutch Cable:

Clutch lever:

Exhaust Gasket:

Kickstarter:

Kill Button:

Shipping:

Uni Air Filter:

(30 Reviews)

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!

We have all necessary support parts on hand.

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

Customers who bought this product also purchased

GPX / YX / ZS H-D 4up Transmission (150cc - 160cc)	MICHELIN STARCROSS 5 mini 2.75 10in Rear tire	SSR - Pit Bike Stop and Start Button for SSR 125 Auto
16T Front Sprocket 428	TBParts - Brake Shoe Set for XR70 XR80 XR100 CRF70 CRF80 CRF100 CRF110 CRF125	TBparts - DNM Rear Shock for CRF70 XR70 KLX110 (300lb) (NOT L)
TB 146cc Bore kit and YX 140 Big Valve Head Kit	NIBBI 24mm Flange mount carb