Piranha 140cc Pit Bike Engine crf50 atc70 crf 50 70 atc

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

Piranha 140cc Pit Bike Engine crf50 atc70 crf 50 70 atc

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 uséd when the engine is hot if required but NO more than 10 ° opening of the throttle in any case