Macro wrote:
Never in my life will a motorcycle engine propel me through the air except by accident
I was reading the praise of the CX500 ... Frankly it made me laugh ... This bike was the testing ground of incredible delirium on the part of the Honda R&D office ... To itself it has cumulated rims like the turbo and various ineffective or even dangerous anti-dive fork system ... Its fabulous acatene transmission, which is durable and clean, was almost in itself the cause of this feeling of "wiggling ass" By the combination of operation of opposing forces and unsprung masses ... I recently tried a BMW flat twin ... Almost new ... The feeling remains for me almost the same (except that the BM when the cylinder head rubs, the wheels are still on the ground )
Even a 1.4D PSA engine that is eaten 100% pig fat will be more reliable than the best motorcycle engine ...
You are misinformed:
The Honda CX did not have an anti-diving fork (except perhaps the turbo), but rear shock absorbers with double flexibility (soft for small shocks, hard for large, unconvincing), the Comstar wheels were extremely robust and I know something about it: stopped behind a fully loaded van (downhill so impossible for me to move), the van suddenly backed off for no reason, getting on the front wheel, the van's wheels were almost off, the rocker completely depressed, but the Comstar did not move a bit ... The turbo worked very well on the CX because the supercharging was low, it was also the only motorcycle on which the turbo was very well suited ... and we could very well use it on modern machines with a variable geometry turbo ...
As for the acatene transmission, it does not particularly influence road holding, it is the frame which lacked rigidity on the CX, moreover quote me a motorcycle of the time (the CX was released in 1977) which was really rigid ... what you feel is a "freezing" effect of the suspension when accelerating, very little noticeable on BMWs elsewhere, which have exceptional road holding thanks to a very powerful (in particular the fork), but no negative effect level road holding and I could compare on BMW R1150R and R1200R (ultra rigid motorcycles which do not twist of a hair) as well as on moto Guzzi 1100 California (which has a fairly rigid frame also although of very old design), I also tried the Buell 1200 "SS" and a sportster XL1200R and XR1200: the belt is much more pleasant because no jerk, it is very flexible and pleasant ... the chain: blah ... jerks, noise, dirt everywhere, boring maintenance: vaderetro satanas ...
When motorcycle engines on ULM, the flat twin BMW 1200 is one of the most famous (and has a double ignition) but the Suzuki Bandit 1200 is very good too, but we must avoid small displacements which have no motorbike engine, no more than a car engine, can run at full speed for a very long time, neither does an airplane engine, not even the Rotax 912: 5 minutes at full speed, beyond t ° internal become excessive.
I would absolutely not trust a 1400 HDI engine running on anything other than diesel ... the high pressure injection system is fragile, do not play too much ...
This BMW engine is approved on F-Pxxx, VLA and "experimental" aircraft, as well as on ULM of course, there is a French version built by "Chapelet"
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