Product Description
PIRANHA 140cc Engine
Comes COMPLETE with:
- Nibbi 19mm Carburetor
- Intake Manifold
- Kick Starter
- Shifter
- Ignition Coil
- Wire Harness
- CDI
- 15 Tooth Front Sprocket
- Throttle Cable
- Clutch Cable
** REQUIRES 1.75" AIR FILTER FOR 19MM CARB UNI 2 in 1 COMPACT AIR FILTER 1.75"
Engine
| Displacement | 140cc |
| Engine Type | Air Cooled, Single-Cylinder, 2-valve, 4-stroke |
| Bore/Stroke | 56mm x 57mm |
| Final Drive | 420 Chain |
| Fuel Delivery | OEM 19mm |
| Fuel | Unleaded / 91 Octane |
| Recommended Engine Oil | 10W-40 Petroleum Based (Non-synthetic) |
Ignition
| Kick Start | Yes |
| Electric Start | No |
| CDI | Yes |
| Auxiliary Output (Lighting) | No |
Transmission
| Transmission | 4-Speed MANUAL 4-Up |
| Shift-Pattern | Four-speed Transmission: N-1-2-3-4 |
Starting pit bike engines will take some practice. All pit bike engines have relatively high compression ratios and require a "quality over quantity " approach in order to ensure quick start ups and avoid mechanical mishaps. It is important follow this routine the first few times when first attempting to start your bike.
- Slowly kick engine over until the kick start reaches a compression stroke (the point in which the kick start lever is hardest to push down.)
- Slowly continue to press the kick starter until the engine rotates slightly through the firmest point in the compression stroke.
- Allow the kick start lever to return back its top rest position
- With a quick and balanced motion - Move down forcefully on the kick lever. These motors need a strong, quick kick to get started.
- If you fail to follow this procedure, especially with longer stroke engines or 125cc + bores you can cause serious damage to your crankcase, clutch and transmissions assemblies!
Tips to Avoid kickback
- Hold onto the crossbar pad with your throttle hand while kicking the bike over to avoid twisting the throttle open by accident
- Before start up - turn the idle screw on the carburetor in a turn or 2 (turn the screw back out to normal idle setting once running.)
- Use a digital CDI with variable ignition timing at start-up, this will help reduce kick back and allow the bike to start much easier compared to the stock CDI unit.
- If ignition timing is adjustable it should be adjusted to the minimum
- Furious, repeated kicking will not get the engine started - firm, full stroke kicks are the only way to get them to start first kick, every time "Quality over Quantity"
- Throttle must be completely closed when you kick the engine over or it will kick back EVERY TIME.
- A small blip of the throttle maybe used when the engine is hot if required but NO more than 10 ° opening of the throttle in any case
Product Videos
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Product Reviews
12 Reviews Hide Reviews Show Reviews
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140cc Kit
From the packaging to the machining finishes, this is a quality piece of kit. Looking forward to the adventure planned for this engine in a '69 CL70 we just pulled from the weeds.
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The best
I love m'y engine
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140/ Xr CRF 70 upgrade
YX/Piranha 140 is the best bolt on motor swap you can get for XR 70 and CRF 70. I have both of those bikes and I have tried 88cc with race head, lifan 125 was pretty good also but nothing compared to performance and price of 140. I am a 200 + pound adult and this motor has me ripping around the yard and pulls me like My 12 year old was on it.
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YX Piranha 140
Motor is a awesome upgrade for my 2003 XR 70 and have 2nd 140cc for CRF 70 This motor puts down 13 HP more or less F yes my 50-70 xr/CRF comrades !
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Awesome!
Awesome motor!
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piranha 140cc
very happy with the piranha 140cc fit perfectly in my 71 Honda ct70
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140CC PIRANHA ENGINE
put engine in a 93 honda 50 runs great, pocket rocket
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Piranha 140cc
I put this on my sons Thumpstar 125cc. The power increase is unbelievable. I recommend using as much of the kit as possible, everything is pretty well matched up. I did have to use my original intake as the one provided moved the carb too far right and interfered with the frame. Definitely pleased with the purchase
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Wheelies
Swapped this into a 125 apollo frame and its a whole new bike. power wheelies.
