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2 Misano Circuit San Marino 2012 MotoGP
21 Mugello Italy 2012 MotoGP
25 Catalunya 2012 MotoGP
2 Estoril Circuit Portugal 2012 MotoGP
23 Phillip Island Australia 2011 MotoGP
17 Aragon 2011 MotoGP
25 Indianapolis 2011 MotoGP
25 Brno Czech Republic 2011 MotoGP
26 Laguna Seca United States 2011 MotoGP
7 Assen Netherlands 2011 MotoGP
16 Indianapolis 2010 MotoGP
20 Estoril Circuit Portugal 2010 MotoGP
6 Catalunya 2010 MotoGP
15 Mugello Italy 2010 MotoGP
32 Jerez Spain 2010 MotoGP
11 Estoril Circuit Portugal 2009 MotoGP
24 Estoril Circuit Portugal 2009 MotoGP
2 Misano Circuit San Marino 2009 MotoGP
4 Donington Park Great Britain 2009 MotoGP
3 Le Mans France 2009 MotoGP
5 Brno Czech Republic 2008 MotoGP
10 Brno Czech Republic 2008 MotoGP
3 Mugello Italy 2008 MotoGP
3 Estoril Circuit Portugal 2008 MotoGP
 

TECH ESSAY: Separate Gearbox Oil? If Yamaha's MotoGP team has started doing this, here are some possible reasons.

TECH ESSAY: Separate Gearbox Oil? If Yamaha's MotoGP team has started doing this, here are some possible reasons.

Seems I recently saw a notification that Yamaha has begun to lubricate its MotoGP gearboxes with something other than engine oil. If true, there could be a couple of reasons for this. In four-stroke motorcycle engines, it seems like a useful simplification to lube the gearbox with engine oil....

Published on September 17 2015, 16:18
Source: www.cycleworld.com
 

When I recently flew to California for the Cycle World Ten Best celebration, the car I rented rubbed my nose in two technologies currently little used in motorcycles—direct fuel injection (GDI, or Gasoline Direct Injection), and widely variable cam timing by means of hydraulic cam phasers. Cars... 

When Yamaha designed its TZ750A engine more than 40 years ago, certain shortcuts were necessary to get it into production quickly. To avoid the problem of making a pressed-together crankshaft four cylinders wide, they built that engine with two separate 180-degree twin cranks that were closely... 

While it's true that many production motorcycles have over the years lubricated their gears by "splash" (that is, by filling the gearbox with oil up to the shaft centerlines or thereabouts), this method has drawbacks. The biggest is power loss through oil churning. Everyone who ran one of... 

When I first started going to races, people were fond of the dramatic. Your bike didn't just stop running, it "blew up." Blow-ups were common. Unlike the present, production bikes were nowhere near being "raceable." To get something close to reliability, your bike had to be built by someone with... 

The various parts of an engine have differing lubrication needs. Gears, with their very high tooth-to-tooth loads, and cam-to-tappet friction, place the greatest loads on oil. Crankshaft main and connecting-rod bearings operate at moderate temperature, but the top piston rings and the exhaust... 

Word is spreading like wildfire today about the new Honda RC213V-S, the street-legal MotoGP replica that will be sold as a 2016 model for a cool $184,000. Starting at 3:00 p.m. PST on July 12, reservations for this limited-production bike can be made only at the bike's official website:... 

Featuring a version of the Revolution Max 1250cc v-twin first introduced in the Pan America 1250, the new Sportster S unveiled by Harley-Davidson today is a modern, high-tech interpretation of the Harley icon. About the only things familiar are the feet-forward ergonomics. With a claimed 121...