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| A single-cylinder motorcycle engine |
Characteristics:
Single-cylinder engines are simple and compact and will be often deliver in the maximum power possible within a given envelope. Cooling is simpler than with multiple cylinders, potentially saving further weight, especially if air-cooling can be used. Single-cylinder engines require more flywheel effect than multi-cylinder engines and the rotating mass is relatively large, restricting acceleration and sharp changes of speed.
In the basic arrangement they are prone to vibration though in some cases it may be possible to control this with balance shafts.A variation known as the split-single makes use of two pistons which share a single combustion chamber.
In the basic arrangement they are prone to vibration though in some cases it may be possible to control this with balance shafts.A variation known as the split-single makes use of two pistons which share a single combustion chamber.
Pros and cons:
Single-cylinder engines are simple and economical in construction. The vibration they generate is acceptable in many applications, while less acceptable in others. Counterbalance shafts and counterweights can be fitted but such complexities tend to counter the previously listed advantages. Components such as the crankshaft of a single-cylinder engine have to nearly as strong as that in multicylinder engine of the same capacity per cylinder, meaning that some parts are effectively four times heavier than they need to be for the total displacement of the engine. The single-cylinder engine will almost inevitably develop a lower power to weight ratio than a multi-cylinder engine of similar technology. This can be a disadvantage in mobile operations, although it is of little significance in others and in most stationary applications.
Uses:
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Early motorcycles, automobiles, other applications such as marine engines all tended to be single-cylinder. The configuration remains in widespread the use in Auto rickshaws, motor scooters, dirt bikes, go-karts, mopeds are radio-controlled models and is almost exclusively used in portable tools, along with garden machinery such as lawn mowers.
The bestselling motor vehicle of the world, the Honda Super Cub has a very fuel-efficient 49 cc single-cylinder engine and big-diameter 17-inch wheels. Some motorcycles with strong single-cylinder engines are available today. There are sport-bikes like the KTM 690 Duke R which has 70 hp 690 cc single-cylinder engine and reaches 125 mph (200 km/h) with a curb weight of only 150 kg, dual-sport motorcycles like the BMW G650GS as well as classics like the Royal Infield 500 Bullet with a long-stroke single-cylinder engine.
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Euro Spec Honda CBR250R revealed |
Apart from the CBR150R pictures (with specs and other details) that we showed you earlier, the pictures and details of the soon to be released CBR 250R have also been spilled on the internet. The pictures were published by a European newspaper. We are not sure whether this exact same bike will make it to the Thai or Indian market, but it’s set to make debut in the European market for sure and give the Ninja 250R a must be good run for its money. Very honestly, after this revelation, we cannot be sure whether the smaller CBR150R or this one is coming to India but something is cooking at HMSI for sure, as is told to us by some of our insider friends.
The engine specs, going by the picture and details carried along with the article point at 249cc single cylinder water cooled engine capable of the dishing out a yummy 33bhp of power & weighing 140kg. The newspaper that has published the pictures assumes that the bike will sell for GBP 4000 in the UK which is equivalent to around 2.7 lakh Indian rupees. Going by that price the new bike isn’t going to be substantially cheaper than its head-on competitor the Kawasaki Ninja 250R if and when it arrives in India.
The bikes just like the CBR150R we talked about earlier during the day draws heavily from the VFR1200F for its design. The front end employs telescopic forks while the suspension duties at the rear are undertaken by a monoshock. There are discs both at the front and at the rear. Interestingly, there is an additional ring forming an inner circle within the front disc brake it’s used to measure the wheel rotation speed while applying ABS. We can be sure that the new bike will feature ABS.
The new CBR250R just like the CBR150R features a split seat, which seems rather usable by a pillion rider. The seating position will be racy with rear-sets positioned rather behind.
Now since we have seen the pictures of this new bike as well, we cannot be sure whether it’s the 150 or the 250 CBR that Honda plans to launch in India. One thing is for sure though, they have something exciting up their sleeves, as is evident from the murmurs we have heard from our sources. Watch this space out, as we go all out and try and bring some more detailed information about the CBR150R and CBR250R the two hottest bikes from the Honda stable which great significance for India.
Racing Classes:
- Off road
Enduro, Hare scrambles, Motocross, Rally raid, Track racing.
- Street
Supermono, Super single, Supermoto.
- Go cart
Kart racing, Crosskart.
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