Some Picture showing Engine on Kart

Why Purchase the SWISSAUTO SA250 Engine

Why purchase the SWISSAUTO SA250 engine? There are numerous
reasons for buying one, but let’s summarise the main advantages:

1. It’s power!
35 Real HP do result in lap times that are quicker then the present KF1 karts!

2. Value!
You get a fantastic power plant that isn’t much more expensive as its 2-stroke equivalents.

3. The service intervals!
Because this 4-stroke engine is built according to the latest technologies in the automotive industry it doesn’t need a rebuild every 10 hours.

4. State of Art!
The continuous engineering progress of the manufacturer in relation to durability and speed based on global race experiences.

5. Its simplicity!
No continuous carburettor settings nor misfires. No promises, but real “Touch And Go”

Technical Specification of SA 250

Engine : Single cylinder 4 stroke with balance shaft

Cooling system : Water cooled, Waterpump integrated in engine block

Engine housing : gravity die cast Aluminium

Cylinder : Aluminium gravity die cast with Nicasil liner

Bore / Stroke : 75 / 56.5 mm

Displacement : 249.6 cc

Power : 35 / 39 HP at 10'000 rpm with 30 / 34 mm carburetor

Cylinderhead : 4 valves per cylinder, DOHC on rollerbearings

Crankshaft : Steel, forged, rollerbearings

Piston : Aluminium forged

Conrod : Steel, forged, rollerbearing

Lubrication system : Integrated dry sump with diaphragm pump

Ignition system : Digital DCI with rev. Limiter

Carburetor : Dell'Orto 30 mm / 34 mm

Fuel pump : Vacuum pump integrated at the engine housing

Gearbox : Direct drive with centrifugal clutch and chain drive

Dimensions : L/W/H = 410/190/330 mm

Engine weight : 15 kg including starter

New SA 250 Kart Race Engine had arrived

The new swissauto 250 is a tough-minded Kart race engine. It is developed and designed purely in respect of the needs for Karting following today’s known rules of the international Kart challenges.

· Simple and fast mounting!

The engine is outboard drive and most of its components are mounted directly on the bloc. This makes it is possible to mount a new engine in less then 15 minutes.

· Light!

With only 25,4 Kg weight on the scale, including all parts such as battery, exhaust, electric starter, carburettor, oil and water, this engine is even lighter as its 2-stroke competitors.

· Easy to handle!

Because al the components are positioned on the outside of the kart, the engine is very easy in maintenance. Another advantage is the very basic kept electronic part of the bloc. Only 1 multi plug for the CDI box and 2 cables to the battery pack. The engine even has an integrated self-bleeding water pump. (Just look at the things less to do: No more building out rear axles, nor spending time on the positioning of the water and oil hoses, no longer purging the radiator, etc.)

· Extremely durable.

The SWISSAUTO 250 is equipped with a timing chain. All rotating parts inside the bloc have roller or needle bearings. A diaphragm oil pump does the oil supply of the integrated dry sump. All things that massively increase the lifetime of the engine.

· Minimal maintenance!

The use of the latest engineering technologies completed with many hours on the racetrack and engine dyno taught us that the running cost of the engine bloc are very low.

· Low emissions (clean)!

One of the advantages of a 4-stroke against a 2-stroke engine is its low pollution. This is a hot item in today’s politic. By using a SWISSAUTO 250 engine, you help the environment. And...who can tell how long you can continue using other engines then a 4-stroke one?

· Low noise emission (dB)!

Already now the engine produces less noise then most 2-stroke engines of today, but to fulfil the highest criteria, the SWISSAUTO factory is working on its own design HQ air box.

· Low fuel consumption in brief high performance

at every level. Another item where Swissauto sets new standards. You must know that the airflow in the cylinder head is approaching today’s F1 levels. This makes the relation fuel consumption against power very good.

The SWISSAUTO 250 is a unique mixture of a high tech race engine and a cost efficient series engine. If we now also consider the price, we must conclude that the new engine concept of SWISSAUTO proves that also in Kart racing the time has passed for 2 stroke engines.