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CT70 YX140cc Manual Clutch Electric Start Engine
MSRP: $735.00
Price: $615.99
You Save: $119.01 (16 %)
10 in stock
Item Number: TB593
140cc Manual Clutch Electric start with a lighting coil engine is assembled and ready to install. This engine will bolt into any Honda CT70 or other models that have similar bolt patterns such as the Z50, TRX70, SL70, CL70, S65, CRF50/ XR50 and many more. However, our expertise and specialty is in the Honda CT70, other models outside of the CT70 (including the Z50) will require custom wiring, fitting and possible fabrication due to the new wiring, carburetor and other mechanical components for the new motor. These are things you will be responsible for, as we have extremely limited experience in swaps outside the CT70. THIS WILL NOT FIT A HONDA ST90 WITHOUT FRAME MODIFICATION. Stock footpegs will not work. **You will need our aftermarket footpeg assembly (TB148). There is a lighting coil in this engine. This is a 12v CDI system so you will need to review your wiring needs for your application. Our engines are specifically made to OEM Honda standard diameter, so there is no special sprocket that is needed for your gearing options.
Trailbuddy engines have an installed 420 front sprocket not a 428- so no need to worry about modifying or changing the rear sprocket you already have installed. This will make it easier for you to gear your bike to either top or low end. You can find the front and rear sprockets under the CT70 section in the subcategory “sprockets”. Our engines are not heavily gusseted by the top engine bolt which allow for a clean and easy mounting experience. You may want to install the motor with new mounting bolts, please see TB128 and TB129B, respectively.
Our engines also have a full wave rectifier which is a more efficient and smoother rectification. A full wave rectifier is double the half wave because it converts both cycles of AC to DC. The ripple factor is less in a full wave rectifier, so the waveform is smooth and easy to filter out.
It is highly recommended that you purchase this fuel switch to work with the carb that comes with our motors: https://mytrailbuddystore.com/fueltankswitch.aspx. The carb has a single fuel inlet while the gas tank will have a dual outlet. Also, please note that the electric start is on the bottom of the motor so you won't have to worry about reconfiguring where to place the carb/intake and air filter.
The motor includes:
25mm Molkt Carb, intake manifold, gasket, bolts, spark plug, gear shift lever, kick start lever, 48mm black dual stage air filter, CDI, Ignition coil, 12v Full Wave Rectifier/Voltage Regulator. Bottom electric start.
Engine Type: 4-Stroke,Single cylinder ,Air/Oil Cooler, Horizontal
Cylinder Arrangement: Single cylinder
Max Power （kw/rpm）: 6.8/7500
Max Torque (N.m/rpm):9.7/5500
Displacement (ml):140CC
Bore x Stroke (mm): 56*57
Starting: Electric/kick start
Clutch Type: Multi Plate Oil Bath Type/Manual Clutch
Transmission Type:
Gear Shift Pattern: N-1-2-3-4
Front Sprocket: __15__t/420
Connections for the YX motors:
Blue/White wire: Pulse
Yellow: Lights out - Pick One
Green/white: Ground
Black/Red: CDI Voltage from Stator Yellow : AC out - Pick One
Electric Starter is on the bottom of the motor. Comes standard with a 420 15T Sprocket. All silver in color.
***Oil is 10w30 or 40 absolutely no more than 800ml from complete drain
**With this engine, if you are purchasing out footpeg assembly (TB148), spacers will be needed between the motor and the footpeg assembly so that the footpegs will clear the transmission. This is the only motor that we carry that this is an issue with. It is a new motor for us and we are working on a better solution for you***
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WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
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MSRP: $26.99
Price: $17.55
You Save: $9.44 (35 %)
Universal Fuel Tank Switch (On/Off/Reserve) – Essential for aftermarket motor swaps. Ideal for replacing stock CT70 petcock when upgrading carburetors. Versatile mounting options and easy installation with included bolts. Ensures smooth fuel flow control.
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This bolt is meant to replace the top engine bolt in either a clone motor or stock 70cc motor- as long as you are using an AFTERMARKET air filter and not the black canister filter. This bolt measures M8x1.25, 130mm long.
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M8 x 1.25, 120mm long Engine Bolt Bottom
Qty. 1
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Upgrade your CT70 with our footpeg bracket assembly featuring both a center and side stand for added stability. Fits most aftermarket engines. Note: Some engines may require spacers. See full description for mounting details and compatibility.
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MSRP: $24.95
Price: $16.99
You Save: $7.96 (32 %)
30" (75.8 cm) cable
Open circuit
Product Name: Kill/start Switch
Type: Ignition
for Handlebar Diameter: 7/8" / 22 mm / 22 mm (7/8")
Color/Finish: Black
Base Color: Black
Number of Buttons: 1
Switch Functions: Kill/Start
Riding Style: Offroad
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MSRP: $24.95
Price: $22.45
You Save: $2.50 (10 %)
UNI Filter Two-Stage Pod Filters offer superior filtration with varying sizes and fitments for motorcycles, ATVs, go-carts, and more. Compatible with multiple carb sizes, they feature durable urethane flanges and black/red foam for dry or wet conditions.
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MSRP: $22.95
Price: $20.65
You Save: $2.30 (10 %)
Enhance performance with UNI brand, featuring a durable urethane mounting base for extended life and a secure fit. The seamless design ensures maximum airflow, while the opening reduces to 3/8" smaller than the charted I.D. size. Comes w/ 1.5-inch (38m)
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MSRP: $22.55
Price: $20.85
You Save: $1.70 (8 %)
OEM-style reproduction clutch cable with grey sheathing. Fits CT70H and CT70 HK1 (1971-1972) and most aftermarket motors with stock bars/lever setup. Also compatible with TB526 125cc and TB593 140cc engines. Original Honda part number: 22870-098-970.
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Price: From $10.95 to $17.95
Emgo brand Clamp-on cone style air filters with high-flow paper elements and chrome end caps. Available in 28mm (Z50), 35mm (CT70), 46mm (125cc/140cc), and 52mm (190cc). Includes stainless steel clamp. Check carb inlet OD before ordering for the right fit
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