Which umbrella do you prefer ?

14 Mugello Italy 2010 MotoGP
32 Jerez Spain 2010 MotoGP
25 Estoril Circuit Portugal 2008 MotoGP
45 Phillip Island Australia 2007 MotoGP
2 Phillip Island Australia 2007 MotoGP
16 Brno Czech Republic 2007 MotoGP
26 Donington Park Great Britain 2007 MotoGP
57 Jerez Spain 2007 MotoGP
25 Jerez Spain 2007 MotoGP
15 Valencia 2006 MotoGP
3 Sepang Circuit Malaysia 2006 MotoGP
19 Sepang Circuit Malaysia 2006 MotoGP
13 Sepang Circuit Malaysia 2006 MotoGP
4 Brno Czech Republic 2006 MotoGP
26 Laguna Seca United States 2006 MotoGP
38 Donington Park Great Britain 2006 MotoGP
5 Mugello Italy 2006 MotoGP
7 Valencia 2005 MotoGP
6 Phillip Island Australia 2005 MotoGP
32 Donington Park Great Britain 2005 MotoGP
6 Assen Netherlands 2005 MotoGP
23 Assen Netherlands 2004 MotoGP
7 Catalunya 2004 MotoGP
16 Motegi Pacific 2003 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...