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Deze reply is gepost in de afdeling Main Forum in het onderwerp 'Nachttopic Deel 40 0:00 - 7:00' (ID 58044).
De reply is geschreven door kenny77 (UserID 11550) op 16-8-2009 0:51.

Quote:
Oorspronkelijk gepost door: BIET
[...]

sexy

stukkie tekst erbij.

"Still Yamaha was working on double shifts on a secret 2 stroke project (code name OW20), but the sole aim was not the MotoGP circuit. Yamaha was also looking in the U.S market and participating in the Daytona 200 to make a mark in the circuit and thereby to the public market. OW20 was, at that time, just another product since the focus was more on 700cc machines. These 700cc engines were built in die-cast crank case in contrast to the OW20 that was built with a sand-cast crankcase. So simultaneously, Yamaha was working on 2 projects, the first, a 700cc model, the "YZ648" which was the prime model as they were more interested in the Daytona circuit vis-à-vis production market and the second, the 500cc named "YZ648A”.
1972 marked a remarkable year for Yamaha since both its prototypes "OW19" (700cc) and "OW20" (500cc) were almost finished and were running quite well. It was the year of Yamaha’s innovation. Starting from base work like grouping four cylinders into units of 2 to give a much slimmer engine design to fine work like introducing an "idle shaft" between the right and left crank shafts as the drive force shaft, Yamaha was at their height of innovation. Credit and mention of Mr. Takashi Matsui has to be given as he was the chief engineer during that period. Mr. Matsui says "From our experience developing the RD05 (the 1964 250cc GP machine) we learned that the ignition order has a big effect on the idle gear, and so we decided to use a well-balanced firing order in which the two inside cylinders and the two outside cylinders fired at the same time. In our efforts to increase the machine's potential banking angle, we designed triangular cross-section mufflers and grouped all four exhaust pipes together and ran them under the crank cases,"

Quote:
Oorspronkelijk gepost door: perryjong
grappig ding^^

Dit bericht is gewijzigd door perryjong op 16-8-2009 om 0:47 uur.
wat voor normale accu hoort er in een honda mb te zitten want ik heb nu maar een 1,3 Ah accu.

Dit bericht is gewijzigd door perryjong op 16-8-2009 om 0:49 uur.

Accu: 6 Volt 4 Ah