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*Engine -- Air cooled, four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder. *Bore x Stroke -- 88 x 66 mm

...'''1800''' was introduced in the mid-1960s. It used an 88mm bore and 74mm stroke and produced up to 102 hp (76 kW) with [[Kugelfischer]] mechanica ...lavia engine. Bore was 89mm and stroke was 80mm for a good [[oversquare]] ratio. This engine was produced from 1968 through 1974.

...aluminum design. All three displacements shared the same long 120 mm stroke, and all were [[SOHC]] designs with a single camshaft serving both banks of ...|Artena]]. Bore was set at 82.55 mm as in the 2.6 L Lambda, but stroke was reduced to a more conventional 90 mm. Total displacement was 1927

*Engine Type: Capacity Config Model Bore/Stroke CR *Length:wheelbase ratio 1.32

[[File:1951 CM 125 cc 2 stroke.jpg|thumb|right|250px|'''1951 CM 125 cc 2 stroke''' [http://www.museoannicinquanta.it <small>Source</small>]]] ...ion was a Burman with three speeds. In 1933, the first 500 cc, with a four-stroke engine valve head. In 1934 the first 250 cc with overhead camshaft.

...ne]] rather than the much more usual, [[reciprocating engine]] of the four-stroke cycle. [[Image:4-Stroke-Engine.gif|framed|right||Four-stroke cycle (or Otto cycle)]]

...eth as the crankshaft gear, it runs at half the crankshaft RPM. See [[gear ratio]]. (The small gear left is on the [[balance shaft]])]] ...exhaust, they must be opened and closed at the appropriate time during the stroke of the piston. For this reason, the camshaft is connected to the [[cranksha

...ho began to build [[motorcycles]], starting with a conventional 160-cc two-stroke version. The first Moto Gino Bartali ''Turismo'' was released, soon followe ...25 cc two-stroke models in the market next 125 cc, 175 cc, and 200 cc four-stroke engine. But many said it really not so.

...have a power output of about 11 - 15 hp. This provides a [[power-to-weight ratio]] favourable to racing. Despite their tiny size both adults and children r

|Wheelbase ratio || 1.72 |Bore × stroke || 90.00 mm × 60.14 mm <br>3.54 in × 2.37 in

|Bore x Stroke || 94 x 71.5 mm |Compression Ratio || 10:1

|Bore x Stroke || 94 x 71.5 mm |Compression Ratio || 11.3:1

...|Desmo]] [[V-twin|L-Twin]]<br>Bore/stroke 92 x 68&nbsp;mm<br>[[compression ratio]] 9.2:1 | Transmission || Close ratio 6-speed

| Engine || Four stroke [[Straight-three engine|Inline three cylinder]] Both the 500cc and the 350cc Factory race bikes specifications, bore and stroke were veiled in secrecy. When information was leaked, MV Agusta was known to

| Engine || 393&nbsp;cc, 2-cylinder, [[Two-stroke cycle|Two-stroke]] ;Engine: Two cylinder, two stroke, air cooled. Bore, stroke: 63 mm x 63 mm (392 cc).

...plica sport production motorcycle. It is powered by a single cylinder [[2-stroke]], [[Nikasil]] coated aluminium cylinder block, liquid cooled 124.8cc [[Rot Aprilia has had many Grand Prix victories in the 125cc and 250cc 2-stroke classes. With years of racing experience, Aprilia has released a new versi

...) torque, with [[gasoline direct injection]] allowing a high [[compression ratio]] of 11.25:1. ...342&nbsp;N·m) at 3100 rpm. The bore is 3.70&nbsp;in (94.0&nbsp;mm) and the stroke is 3.37&nbsp;in (85.6&nbsp;mm). In some applications, including the [[Buick

...ylinder 77° v-twin dry sump water cooled four stroke with 12:1 compression ratio. The '''Aprilia RXV/SXV''' series are [[four-stroke]], [[v-twin]], off-road motorcycles produced by Aprilia. They are available

| Engine || Four stroke, single cylinder, double over head camshaft * Bore Stroke: ([[4-stroke]] [[Single cylinder]] 53 X 56 - 123.5 cm)

|Engine || 1098: 1099&nbsp;cc bore/stroke: 104 x 64.7 mm<br> 1098 R: 1198&nbsp;cc bore/stroke: 106mm x 67.9mm <br>

...der fed through three Weber 30DCF [[carburettor]]s. A 7.5:1 [[compression ratio]] yielded 118&nbsp;hp (88&nbsp;kW) at 6800 rpm. ==58.8 mm stroke==

...iston for every engine revolution, instead of every second revolution. Two stroke engines can be arranged to start and run in either direction. Two-stroke engines are used most among the smallest and largest reciprocating powerpla

...in [[motorbike]]s of the [[MotoGP]] class. These are [[Two stroke cycle|2-stroke]], 500 [[Cubic centimetre|cc]] [[V engine]]s with two banks of two cylinder Displacement, bore x stroke: 142 cu. in. (2327 cc), 4.0 in. x 3.75 in. (101.6 mm x 98.4 mm)

...led [[L-twin]]<br>Bore x stroke: 90&nbsp;mm x 58.8&nbsp;mm <br>Compression ratio: 11.7:1 * Primary drive: Straight cut gears; ratio 1.84

...engine]] or [[external combustion engine]] is a value that represents the ratio of the volume of its combustion chamber; from its largest capacity to its s ...the volume of the combustion chamber when the piston is at the top of its stroke.

...m) single cylinder engines with gear driven camshafts. The [[compression]] ratio of both engines was kept at a "Low" 6:1 due to the fact that fuel was not o ...eleased in 1948, and with the new design and a slightly higher compression ratio (7:8:1), the horsepower was now up to 21 which would also increase the spee

...iston for every engine revolution, instead of every second revolution. Two-stroke engines can be arranged to start and run in either direction. [[Image:Arbeitsweise Zweitakt.gif|center|thumb|500px|A two-stroke engine with an expansion pipe illustrating the effect of the reflected pres

|Engine || Liquid cooled, four stroke, 90° "L" twin cylinder, DOHC, desmodromic four valves per cylinder *'''Engine:''' Liquid cooled, four stroke, 90°“L”twin cylinder, DOHC, [[desmodromic]] 4 valve per cylinder.

|Bore and Stroke || 92mm x 80mm |Compression Ratio || 9.5 : 1

...twin|L-twin]] <br>Bore x stroke: 80&nbsp;mm x 74.4&nbsp;mm <br>Compression ratio: 8.5:1

...''Internal combustion piston engine''' <br>Components of a typical, [[four stroke cycle]], internal combustion piston engine. <br> ...xhausted]]" gases are removed from the cylinder by this [[Stroke (engines)|stroke]]. The exception is the Stirling engine, which repeatedly heats and cools t

...ngle]]<br>12:1 [[compression ratio]]<br>Weber [[fuel injection]]<br>bore x stroke: 100&nbsp;mm x ? The single cylinder Ducati racer was built with [[Power-to-weight ratio|power to weight]] in mind. [[Carbon fiber]] pieces included bodywork, [[sub

|Length / Wheelbase Ratio || 1.77 |Stroke || 82 mm (3.23 in)

|Engine || 50cc Single cylinder two-stroke, liquid cooled ...[motorcycle]] made by [[Aprilia]]. It is powered by a single cylinder [[2-stroke]] aluminium cylinder block, liquid cooled 50cc AM6 engine. The bike is popu

|Transmission || 4-speed manual with low ratio transfer box | Engine:&nbsp; || colspan="5" align="center" |4-cylinder-inline engine (four-stroke), front-mounted

; Cylinders : Bore × stroke 82.5 mm x 92.8 mm (0.89 ratio), 496 cc/cylinder, aluminium block with integrated liners with eutectic all

|Bore x Stroke || 90 x 58.8 mm |Compression Ratio || 12.3:1

...basement) operated by [[gears]]; crankshaft on three media, [[compression ratio]] 5:1, [[power (physics)|power]] Max [[Cavallo steam|CV 60]] at 1800 rpm, f

...of shorter [[compression height]], to maintain the original [[compression ratio]]), or both. ...t), by changing the profiles of the [[camshaft]] or the lift ([[lever]]) [[ratio]] of the valve rockers ([[Overhead valve|OHV]] engines), or cam followers (

...tage: making rapid replacement of two gears that determine the final drive ratio (allowing a rapid adaptation to the circuit) and, simultaneously, put signi ...modifications and adjustments "pushes" as an increase in the [[compression ratio]] or the use of [[Biella (mechanical) | rods]] alloy.

...ftlbf torque. All these figures give the 1198 the highest torque-to-weight ratio of any production sport bike ever made. ! Bore x Stroke

...ari Dino#286 SP|286 SP]]. The latter had a 90&nbsp;mm bore and 75&nbsp;mm stroke for 2863&nbsp;cc and 260&nbsp;hp (194 kW). ...d a tiny 1.6&nbsp;L (1593&nbsp;cc) version of the 65° unit. Both bore and stroke were different from the earlier engine at 77x57&nbsp;mm and output was impr

...with a 1987&nbsp;cc capacity (long stroke, 72.6x80 mm, with a compression ratio of 13.5 :1) delivering 160hp, in 1951 and 1952 ...en with a 1989&nbsp;cc capacity (short stroke 75x75 mm, with a compression ratio of 13.5 :1, with twin ignition) delivering 180hp, in late 1952

* [[Running (mechanical) | Stroke]]: 59 mm * [[Compression ratio]]: 8,4:1

*Bore x Stroke: 104&nbsp;mm x 58.8&nbsp;mm *Compression Ratio: 12.5:1

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9:1

|Engine || Liquid cooled,249 cc,2-stroke,90-degree V-Twin Aprilia RS250 is 2-stroke 249&nbsp;cc [[sport bike]] made by Italian bike manufacturer,Aprilia.

...cylinder [[desmodromic valve|desmodromic]] air cooled [[L-twin]]<br>Bore x stroke: 88 mm × 57.2 mm / 88 mm × 57.2 mm<br> [[Compression ratio]]: 10.6:1

*Stroke 75.2 mm / 2.96 in *Compression Ratio 11.2:1

...Engine displacement|displacement]], 55.2 mm ∅ x 52 mm, 6.8:1 [[Compression ratio|compression]], 25° forward inclined. Dell'Orto MB18BS carburetor. ...eloped 6.5 bhp at 6,500 rpm from its 55.2 x 52 mm engine. The compression ratio was 6.8:1 and an 18 mm Dell'Orto carburettor was used. Performance didn't

| Stroke | Gear ratio

[[Image:4-Stroke-Engine.gif|framed|right|[[Four-stroke cycle]] (or Otto cycle)]] ..., reciprocating internal combustion engines the fundamental theory for two-stroke engines was established by [[Nicolas Léonard Sadi Carnot|Sadi Carnot]] in

* [[Running (mechanical) | Stroke]]: 59 [[mm]] * Compression ratio: 9,4:1

* Higher [[power-to-weight ratio]]s. ...piston of an engine of corresponding capacity, a rotor may perform many [[stroke (disambiguation)|strokes]] per revolution. The Wankel produces twelve strok

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9,5:1

...e]] with a centre main bearing support. The bore was 84.5&nbsp;mm, and the stroke 56&nbsp;mm. Valve actuation was by pushrods and rocker arms. That was the e *'''SPORT ENGINE''' - 4 Cylinder 1260&nbsp;cc, Bore x Stroke 84.5 x 56&nbsp;mm

An engine's air/fuel ratio must be [[accuracy and precision|accurately]] controlled under all operatin ...mpromise is to run the rich cylinders "even richer" than the best air/fuel ratio, to provide enough fuel to the leaner cylinders. The net power output impro

* [[Bore]] and [[race (mechanical) | Stroke]]: 68 mm x 75 mm * Compression ratio: 9,3:1

| Engine || Air cooled, four stroke, 90° two cylinder '[[L-twin]]', SOHC, 2 [[Desmodromic_valve|Desmodromic va *Bore x Stroke 88x66&nbsp;mm

...ted camshafts, variable geometry intake manifold, an increased compression ratio of 10.5:1, and updated emissions equipment. Power increased to 174&nbsp;hp ...m with a 90.0&nbsp;mm stroke. The "Vee" angle is 15° and the [[compression ratio]] (CR) is 10:1.

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9:1

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9:1

| Engine || Air cooled, four stroke, 90° “L”twin cylinder, SOHC, desmodromic 2 valve per cylinder. *Bore x Stroke 88x66&nbsp;mm

...]]. It was also decided to base the power plant on the horizontal twin two stroke unit of 125cc capacity. In 1952, with the popularity of scooters, Rumi sta ...which had a 22mm carburetor, larger exhaust pipes and a higher compression ratio.

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9,5:1

..., reciprocating internal combustion engines the fundamental theory for two-stroke engines was established by [[Nicolas Léonard Sadi Carnot|Sadi Carnot]] in ...tlieb Daimler]] and [[Wilhelm Maybach]] in the 1870's developed the [[four-stroke cycle]] (Otto cycle) engine.

Bore & Stroke: Compression Ratio:

...ansmissions, include the ability to select one of several different [[gear ratio]]s. In this case, most of the gear ratios (simply called "gears") are used ...sed, these simple transmissions all share an important feature: the [[gear ratio]] cannot be changed during use. It is fixed at the time the transmission i

*Bore & stroke: 85 by 79 mm (3.34 by 3.11in) *Bore & stroke: 85 by 79 mm (3.34 by 3.11in)

[[Image:4-Stroke-Engine.gif|framed|right|[[Four-stroke cycle]] (or Otto cycle)<br />1. intake<br />2. compression<br />3. power<br ...el mixture could be sucked or blown in during the first part of the intake stroke. The most significant distinction between '''modern internal combustion eng

* [[Running (mechanical) | Stroke]]: 68 [[mm]] * Compression ratio: 9,5:1

...can reach it, combusting suddenly before the optimum moment of the [[four-stroke cycle]]. The resulting shockwave reverberates in the combustion chamber cr ...tion of in-cylinder temperatures (such as through cooling or [[compression ratio]] reduction).

...oke]], 124.4 cc [[Engine displacement|displacement]], 6.8:1 [[Compression ratio|compression]], 25° forward inclined |Bore stroke || 55.2 mm x 52 mm

...front suspension geometry with light alloy 13 inch 6J wheels and the close ratio 5 speed gearbox and wheel arch extensions. ...with a 72&nbsp;mm bore and 67&nbsp;mm stroke. A higher (9.0:1) compression ratio and the fitment of twin solex carburettors raised power to 71&nbsp;bhp (53&

...of being one of the first to grasp the potential of the modern school two-stroke engines with rotating disc distribution. ...50cc, and allowed Mondial to show off this horizontal single-cylinder two-stroke that set in motion a series of successes, and with which Walter Villa, brot

* [[Running (mechanical) | Stroke]]: 51 [[mm]] * Compression ratio: 7,11:1

...sp;L (7,993&nbsp;cm³/488&nbsp;in³) with a square 86 by 86&nbsp;mm bore and stroke. ...ht is expected to reach 4300&nbsp;lb (1950&nbsp;kg) with a power to weight ratio of 513.3 hp per ton (metric) or 4.36&nbsp;lb/hp (SAE). OBSOLETE TEXT-->

* [[Running (mechanical) | Stroke]]: 72.5 mm * Compression ratio: 7,8:1

...ower#Brake horsepower (bhp)|bhp]] at 11,000 rpm. (Having the same bore and stroke as the later 500 Pantah) All Ducati’s 500 cc GP engines used [[desmodromi

...ned as a flywheel, rotary piston engines typically had a [[power-to-weight ratio]] advantage over more conventional engines. ...h the engines of the day ran, the pulsation resulting from each combustion stroke was quite large. In order to damp out these pulses, engines needed to mount

...4.5 seconds, and has a top speed of 75mph. It has a better power to weight ratio than a Ferrari F50. A kart like this can be driven by race licence holders ...tions. [[Gasoline]] [[Two-stroke cycle|2-stroke]] or [[Four-stroke cycle|4-stroke]] engines are the most common type, but other types of propulsion are avail

...by pushrods, rockers, screw-type adjusters, 1064cc, 92 x 80mm, Compression ratio: 9.5:1, Weber fuel injection with 2 40mm throttle bodies, Lubrication: wet ...d; Displacement: 1064CC, 90� V-twin; Bore/Stroke: 92mm x 80mm; Compression Ratio: 9.5 : 1; Max. H.P: 77 @ 6400 RPM; Max. Torque: 70 ft/lbs. @ 5000 RPM; Valv

...]], liquid cooled<br>Bore x stroke: 98&nbsp;mm x 66&nbsp;mm<br>Compression Ratio: 11.5:1 ...F1. It featured more aggressive camshafts, titanium conrods and a shorter stroke and wider bore, which allowed it to rev more safely at high RPMs. It produc

...nd stroke was 85 mm x 66 mm, capacity was 2996 cc. And, with a compression ratio of 9.75:1, the Serenissima V8 power unit developed a power output of 305-30 ...September 1966, the Serenissima M166 engine was rebuilt with new bore and stroke (91.5 x 57 mm, capacity was 2998.46 cc) and became the M167.

Until this time, diesel engines had poor [[power-to-weight ratio]] and low speed. Before the war, Napier had been working on aviation diesel ...for exhaust port lead and inlet port lag. These engines are called '[[Two-stroke cycle#Uniflow|uniflow]]' designs because the flow of gas into and out of th

...650 [[Fahrenheit|°F]]. At the top of the piston [[Stroke (disambiguation)|stroke]], [[diesel]] [[fuel]] is injected into the [[combustion chamber]] at high There are two classes of diesel engines: two-stroke and four-stroke.

...echanical) | pistons]] the [[camshaft | camshafts]], the pump of oil and [[Stroke (mechanical) | race]] that was brought to 59 [[mm]], to have a [[engine cap ...re the key words of the successes but especially the great power to weight ratio that put out the qualities of the pilot. It is no coincidence Jim Pauley (w

...0 rpm, 46 mm sequential timed electronic multipoint injection, compression ratio 13:1 The F4 engine is a liquid cooled inline four cylinder (4 stroke) with two overhead camshafts (DOHC), 16 radial valves, electronic multipoin

...|thumb|350px|[[Displacement]], One complete cycle of a four cylinder, four stroke engine. The volume displaced is marked in red.]] ...lar pistons, displacement can be calculated from the [[bore]] diameter and stroke using the following formula:

In the Wankel engine, the four [[stroke (disambiguation)|strokes]] of a typical [[Otto cycle]] engine are arranged ...displacement]] in a similar state of tune, and higher than that of a four-stroke piston engine of similar physical dimensions and weight. This design also a

...applications when the suspension is constantly forced to the bottom of its stroke causing a reduction in the useful amount of suspension travel which may als Spring rate is a ratio used to measure how resistant a spring is to being compressed or expanded d

...ean operation. The amount of [[oxygen]] to [[fuel]] in the engine is in a ratio for the most complete combustion. When there is more oxygen than required, ...ble (the lead becomes vapourized in the combustion chamber of a gasoline 4 stroke engine under the ambient temperature and pressure after charge air ignition

| Engine || BRP-[[Rotax]] V990, 997,62&nbsp;cc 60° [[V-twin]], 4-stroke, liquid cooled | Engine || BRP-[[Rotax]] V990, 997,62&nbsp;cc 60° [[V-twin]], 4-stroke, liquid cooled

*Bore x Stroke: 86 mm x 42.56 mm *Compression Ratio: 13.5:1

* [[Running (mechanical) | Stroke]]: 75 [[mm]] * [[Compression ratio]]: 9.8:1

...pression and initially produced 61.2bhp at 11,000&nbsp;rpm. (Same bore and stroke as the later 500 Pantah) All Ducati’s 500&nbsp;cc GP engines used desmodr ...special parts, including the Imola cams and the limited availability close ratio gearbox. The 2&nbsp;kg inboard flywheel had been removed, but the bike did

...gine displacement|displacement]] version of the engine (78 mm bore x 82 mm stroke, 6.38 L oil sump, 7.41 L radiator). Dunlop [[disc brakes]] were fitted all ...m. Maximum torque was increased to {{Auto Nm|186|0}} at 3000 rpm. A higher ratio final drive was fitted (10/41 instead of 9/41) but the same gearbox ratios

| class="lightbg" id="car_specsleft" | Bore / Stroke With its amazing output of 570 hp, sensational power-to-weight ratio of only 1.75 kilograms per hp and 0 to 100 km/h (0-62 mph) acceleration of

...s similar to that in cars. The other was a two cycle (sometimes called two stroke)engine in which the engine oil was mixed with the gasoline or went into an ...epaired much easier and cheaper. There are three main downsides of the two stroke: first, they are less efficient, second, they rely on oil mixed with the ga

...ompression ratio]] - this means less space in a cylinder on its combustion stroke, hence a higher cylinder temperature, less wasted hydrocarbons (therefore l ...er kilogram is higher than for gasoline (higher [[hydrogen]] to [[carbon]] ratio). In lay terms, we burn mass, not volume!

...mera. The Catria formed the basis for the backbone of Motobi's future four-stroke range, progressively upsized from the 62 x 57mm 175CC base version to an ov ...f-taught tuner, [[Zanzani]] was the man responsible for turning the [[four-stroke]] family of Motobi models into such competitive hardware both in ltaly and

!Bore/Stroke !Compression Ratio

...came from a 236 cc (14.4 in³) 9.5&nbsp;hp (7.1&nbsp;kW) two cylinder [[two-stroke]] motorcycle engine. The engine was started by a combination generator-star ...ey redesigned the powerplant around a more reliable BMW one-cylinder, four-stroke, 247&nbsp;cc motorcycle engine making 13&nbsp;hp. Although the major eleme

...configured in a 90° [[V8]]. The cylinder bore diameter is 92 mm and piston stroke length is 80 mm. The engine shares many of the design features of modern ra

...eigh a minimum of 77 kg. By using engine and rear wheel sprockets the gear ratio can be changed as required. Races consist of between 4 and 6 riders competi The use of methanol allows for an increased [[compression ratio]] to the engine producing higher power and resulting in higher speeds (appr

...r to the motor in the Lamborghini Urraco P300s. In fact, even the bore and stroke of 86.0 x 64.5mm are the same as this classic small block V8. The concept o ...ht camshafts, four-valves per-cylinder (64 valvs), and a 9.3:1 compression ratio, power output is a healthy 540bhp at 8,000rpm with 500 lbsft of torque at 6

(See also: [[weight-to-power ratio]]) ...V6 engine (gasoline) - 1.0&nbsp;L - 1960s [[DKW]] [[DKW F102|F102]] (a two-stroke V6) ''(about 100 produced for testing, 13 fitted to road cars)''[http://www

...normal conditions starting was from second, with the fifth having the same ratio as fourth in the normal Panda. Austrian company Steyr-Puch supplied the ent ...bore and stroke of 72 mm and 84 mm respectively, running at a compression ratio of 10.8:1. Ignition is by Fiat's Jet Thrust Stochiometric system with seque

...-angle engine displacing just 903 cc, the smallest V4 ever built. Bore and stroke were new again at 65 mm by 68 mm, and output was just 28.8 hp (21.5 kW). ...ted Volt previously) and some ritocchi to the motor (variation compression ratio, various calibration of the carburetor) <br>

...ystem, [[distributor]], and [[valvetrain]], also marginally increasing the stroke, enlarging the capacity from 721 cc to 747 cc. He designed space frames wei ...he [[combustion chamber]]s being reduced in size, increasing [[compression ratio|compression]] and improving performance. The bodywork retained the characte