Kyosho Ke25 Engine KYO74019 View larger

Kyosho Ke25 Engine KYO74019


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Due to distributor restrictions, the following brands are not available for sale outside of the 50 United States: Losi, Team Losi Racing, Blade, ParkZone, ECX, Hobby Zone, E-Flite, Vaterra, Dynamite, Pro Boat, Spektrum, JR Radio, Orion, and Hangar 9.

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This is the Kyosho Ke25 Pull Start Engine. This new engine features modifications that increase performance and value.  The proven Kyosho Ke25 engine is complimented with a new cooling head, tuned muffler and manifold for improved power efficiency and acceleration.

Fact sheet

Main Category Engines & Accessories
Engine Size .16 & UP - CAR
Free Shipping Free Shipping
In-Store Pickup QTY 0
Product ID 9083

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Q&A (1)

From Customer | 2016-02-09 17:32:01

How do I break in the KE25 Engine?


There a few different methods and ways but this is a proven way to break in any engine.

• It is recommended to NOT run the body on your vehicle during


• DO NOT run the engine at full throttle until the break-in procedure

is complete and the needles are set for your current conditions.

• We DO NOT recommend that you idle your engine on a starter

box for break-in.

• Do not allow the engine to run out of fuel during break-in. This will

cause the engine to lean out possibly causing engine damage.

• We highly recommend the use of a quality temperature gauge

to monitor engine temperature.

Find a large, flat, open area to perform the break-in procedure.

When leaning the engine during break-in, only

make adjustments of 1-hour increments. This will

help prevent over leaning the engine during break in

and causing damage to your engine.

Tanks 1-4: Start the engine and run the vehicle approximately 100

feet back and forth or in a figure eight. Do not squeeze the throttle

more than 1/2-way. Every 4-6 passes check the engine temp

making sure that it does not go over 170° Fahrenheit. Continue this

procedure for the first four tanks, making sure you do not allow the

engine to run out of fuel.

Tanks 5-6:

Continue running the vehicle approximately 100 feet

back and forth. Now you can squeeze the throttle 3/4 of the way.

Continue to temp the engine every 4-6 passes, making sure that

the engine temperature does not go over 190° Fahrenheit. After

tank 6 you are ready to fine tune in your engine. After tank 6 allow

the engine to cool down. Then restart the engine.

Tanks 7-8:

You can now run the vehicle approximately 150-200

feet, pulling the trigger to full throttle the last 50 feet of each pass.

Continue to temp the engine every 4-6 passes, making sure that

the engine temperature is close to 200° Fahrenheit but no more

than 210° Fahrenheit.

During tanks 7-8 bring the vehicle to a stop and allow it to idle for 10

seconds. Then pull full throttle for approximately 100 feet. Take note

of how much smoke comes out during acceleration. Optimum is a

small amount of smoke from stop to approximately 100 feet. Once

this is achieved do the same thing only go 150-200 feet. Continue

to check the engine temperature every 4-6 passes. The final head

temp after break-in should be approximately 210° Fahrenheit.

After the 8th tank, your engine should be ready to race. Additional

Tuning may be necessary at the track for optimal performance.

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