Ever since Jerez, when the Red Bull KTM Factory Racing Team debuted a new engine with a counter-rotating crankshaft, fans and journalists have been asking when factory riders Pol Espargaro and Bradley Smith would be able to use the new engine on a race weekend. KTM test rider Mika Kallio had been very positive about the engine during the Jerez weekend, and Smith and Espargaro had spoken in glowing terms about it after the Jerez test. KTM’s response was always that it would not be ready until at least after the summer break. Reversing the direction of crankshaft rotation is not as simple as sticking an intermediate gear between the crank and the clutch, to allow the crank to spin in the opposite direction while maintaining forward thrust.
The conversation about Skully quickly moves from the failed startup, to a broader conversation about helmet design and the progress of technology in this space. The show then turns to California’s lane-splitting law, and what it could mean for motorcyclists in states other than California.
Once the news items are out of the way, the show spends a bit of time talking about crankshaft design, namely what it means to have a “crossplane” crankshaft.
Further down the rabbit hole, this turns into a larger conversation about how engines make their power, and how that power is tuned for specific tasks. It’s a tough subject to do only via voice, but we think you’ll enjoy it.
As always, you can listen to the show via the embedded SoundCloud player, after the jump, or you can find the show on iTunes (please leave a review) or this RSS feed. Be sure to follow us on Facebook and Twitter as well. Enjoy the show!
Honda has issued a sizable recall for 11,424 motorcycles, which pertains to the Honda CBR300R and Honda CB300F motorcycles for the 2015 and 2016 model years. The recall stems from a the bikes’ crankshafts, which may have been machined improperly, and as a result could cause the rod bearing to fail.
Since a rod bearing failure could potentially stall the engine, a recall was filed with the National Highway Traffic Safety Administration (NHTSA).
So far, Honda has only found 41 affected motorcycles, with zero injuries reported. Honda dealers were notified in July to stop sales of the CBR300R & CB300F until recall work could be completed.
Debuting a “crossplane” three-cylinder engine at the INTERMOT show, Yamaha has gotten the word out that it intends on making more inspiring motorcycles, and part of that plan includes the use of triples in its upcoming bikes. Knowing that at least one, if not several future Yamahas will use the hinted-at three-cylinder lump, the Brits over at Visordown have gotten word from their sources within Yamaha Japan that in the coming future, the Yamaha YZF-R6 & Yamaha YZF-R1 will be two of the bikes to receive such modifications.
The FIM has announced that BMW has homologated a new crankshaft design for World Superbike and World Superstock racing. Effective since June 10th, the new crankshaft, much like the Aprilia RSV4’s upgraded camshaft, could be part of the equation for BMW’s recent success in WSBK, and continued domination in STK1000.
MotoRevue is reporting that the 2010 Yamaha FZ1, like the 2010 Yamaha R6, will not be updated with the R1’s cross-plane crankshaft. The FZ1 is a shining example of Reaganomics, getting the trickle down technology of the YZF-R. So, it comes with some surprise that we hear that it won’t get the MotoGP inspired crankshaft, but never fear loyal Fazzer owners, it does seem that the FZ1 will get some love in the next two years.