A four-valve setup uses two larger valves for intake and two smaller ones for exhaust. The configuration is smaller in dimension and lighter in mass compared to a two-valve configuration.
Thanks to this, the valves travel freely and at a higher frequency, enabling the engine to run at higher rpm and extract more performance. The precise control over the opening and closing of these valves is called valve timing, and it's absolutely crucial. Camshafts, valves, pistons and crankshafts work together for proper combustion in a cylinder. Any inconsistency in this operation could lead to improper combustion which results in low fuel economy and lack of power. In a four-stroke cycle, the camshaft needs to complete two full rotations degrees , rotating a full degrees every time the piston goes from top-dead-centre TDC to bottom-dead-centre BDC and back.
In bikes, a cam chain is used to connect the camshaft to the crankshaft. As a result, the camshaft rotates in sync with the crankshaft which runs the piston.
Cam rotation comprises of four key aspects - timing, duration, overlap and lift. More lift means the valve is open for a longer duration allowing for more air-fuel-mixture to get into the combustion chamber. Simply put, the valve opening relies on the shape of the cam lobes, which force the valves to open as the camshaft rotates.
The larger a cam profile, the longer a valve will remain open. Yamaha celebrates half a century since the very first MotoGP race of the house Iwata, and a special livery was ordered for the limited edition R1 machine. The bike arrives in a somewhat retro color scheme with bright white and red accents, complete with the black trim of the belly pan, frame, engine and wheels. The MY R1 receives a new, more aggressive front fairing which improves air management, and a 7-way traction control system aimed at putting the rider in total control of the bike even under very hard acceleration on less-than-ideal surfaces.
The MY YZF-R6 is loaded with top-notch technologies which are aimed at providing a more rewarding experience on two wheels, whether for daily riding or track days. Sporting the acclaimed Yamaha Chip-Controlled Throttle, the new R6 provides precise fuel delivery in all scenarios with a flawless response, a great match for the variable intake tract which grants the optimal cylinder filling fo An in-line 4 architecture that sounds almost like a V is definitely a cool thing, adding to the overas sizzling hot features of the R1.
A sporty machine that feels at home on the track, the R1 also has a seating position which makes it suitable The MY YZF-R6 is a great way to have sporty fun on the wide open roads, as it incorporates a lot of racing technologies in a supersport package with premium handling and power to make even the most seasoned riders smile in thrilling pleasure.
A lightweight construction keeps an eye on the power to weight ration and ensures the outcome is a pure sport-blooded one. Not exactly a machine fo Ready for the race track but at the same time a comfortable presence on the street, the MY Yamaha YZF-R6 introduces a new silencer for reduced noise, a new ECU mapping, revised intake funnels, a different airbox and a revised 4-into-2into-1 collector system.
Loaded with both electronics and parts which are directly derived from Yamaha's racing program, the YZF-R6 is a machine intend On the tech side, the Limited Edition bike is identical to the base model, packing the same rac The Yamaha YZF-R1 receives MotoGP technology from the M1, to be more precise the new R1 will use a cross-plane crankshaft, and it's the first street legal motorcycle to use this kind of technology.
The YZF-R6S is the more streetable version of the R6, packing better comfort for longer rides and increased all-day, all-round convenience. However, the MY YZF-R6S is not an easy-to-tame beast, as it still retains much of the nerve of its supersport, track-oriented sibling. Despite the somewhat similar looks of the current R6S and older R6 machines, the casual "upside up" forks The MY Yamaha YZF-R6 shares the updates with its liter-class sibling, and brings forth a new, more powerful engine, loaded into a new, optimized frame with a design oriented on higher sporty performance.
The higher-revving power unit has a new mapping and is equipped with a high-performance slipper clutch to help riders when they brake hard or downshift. And to keep weight to a minimum, The MY YZF-R1 retains the acclaimed crossplane crankshaft for exceptionally smooth, linear throttle for an incredible feeling of being actually connected to the bike and rear tire.
The all-new engine for feels and sounds smoother, and its MotoGP-derived inspiration makes it the most advanced power plant ever to sit in a Yamaha sport machine. Yamaha has also made major changes for th For Yamaha will launch the all-new YZF-R, an exciting new member of the R-series family which is aimed at taking the number one position in the sports cc market. Featuring a liquid-cooled single-cylinder engine running in full-sized Deltabox chassis and clothed in aggressive R-series style bodywork.
The YZF-R is aimed at the young first-time buyer who demands best-in-class engine In R1 10th Anniversary celebrates ten years of life of a motorcycle who wrote the history of cycling. The decision to dedicate the livery of the new R1 10th Anniversary Noriyuki Haga is not accidental.
The bike's bodywork is a combination of sparkling white and matte black panels, beautifully adorned with fiery red accents. The red elements also include both the rider and the pillion seats, the front fender and the rim stripes on the black cast wheels. Performance specs have not been a The already breathtaking engine was furthermore revised with a lot of titanium and other lightweight alloys for weight saving, and an all-new slipper clutch added a more precise torque deployment to the rear wheel.
The frame also received updates, and became lighter and more rigid, prov The untrained eye will easily mistake the R6S for its track-focused R6 sibling, but despite the similarities, these are two different beasts. The MY R6S is the "urban" version of the R6, with a revised riding position and a slightly more tamed engine, with the peak torque and power point set lower in the rev range.
This bike is also a machine not intended for novice or inexperi Like its very name says it pretty clearly, this bike was created for the Canadian market only. Just like the international version, the Canadian The latest generation of the Deltabox aluminum frame and new The standard R1 finds a happy medium, delivering class-leading performance and One can easily tell the R from its track-focused brothers in an instant, even from afar.
Even though the new R might look like an older R6, its one-piece two-up seat is the best indicator as of the nature of the bike. Created as slightly more tamed version of the R6, suitable for daily rides to work and around the city, the MY Yamaha R id dedicated to those in search of a sporty mi A more civilized, street-friendly version of the R6, the MY R6S brings a new definition to the term "do it all sport bike".
R1's smaller sibling, the R6 was not forgotten when upgrades hit the production line. This exceptional, 16, rpm-redlined engine is capable to deliver breathtaking performance both on the track and the street, though the former is its true home. Multiple engine and suspension tweaks have added to the handling feel of the R6, and the current version offers more dependability.
The b The engine in the R1 is more powerful than the previous versions, but managing all the power is however an easier task, at least for slightly more experienced riders. The Deltabox V frame design provides better control and enhanced rigidity, while helping centralize mass better for an even more nimble feel.
Electronics for this engine have also been updated. Almost the entire bike has re We feel the R15M could be a more premium and focused variant meant for more serious riders. Moreover, only a month ago, two Rlike testing mules were spotted in India. The test mules appeared more muscular and featured an all-new Yamaha R7-inspired fascia along with a beefy USD fork up front.
Along with the names, the approval documents have given away some of its specifications too. Surprisingly, the power output has been listed at However, the bike remains as is dimensionally, with the same wheelbase, length, width and height.
We expect Yamaha to launch the new R15s during the festive season, possibly around Diwali, at a premium of around Rs 6, - Rs 7, over the current R15 V3. Stay tuned on ZigWheels for all the updates.
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