I read that, and like anything else, its subjective to the rider.
I am used to bikes that vibrate since most of my life I rode old Triumphs and Harley's.
If parts crack and fall off, bulbs blow, it bothers me, if not, it does not.
I also tend to gear my street bikes tall as I can.
There were some old thumpers that were just nasty, and the old 500cc twin Triumphs were nasty at high rpm's, where they made all their power, the 650 and 750 bikes were great I thought, old sportsters were ok.
Originally Posted by ferrix
The answer to that question appears to be, 'sort of'... Here's a quote from a post written by an owner on another forum:
There is little that is different in the 400 and 500 engines. Almost all parts are the same, the main difference being the crank, which in the 400 creates a different stroke reducing the capacity to 399cc. This does however make a real difference to the way the engines feel. The 400 prefers 6-800rpm higher in most situations – whether it comes to getting the power on, cruising on the highway, or lugging along. It also revs more easily. If I was building a café racer I’d seriously consider the 400 over the 500, as I have seen others do (who go out of their way to secure a 400 crank for their 500). It is a more revvy engine and arouses more adrenalin in me than the 500. It feels more sporty. The 500 is much nicer for chugging along while fantasising about the upright big singles those gentlemen of old rode. On the 500 I find myself rarely leaving the 3000-4000rpm range, and on the 400 I'm more inclined to sit between 4000 and 5000rpm.
At 100kph the 500 sits on about 4,200rpm, though this can be lowered slightly without problems by use of a 17 tooth counter-shaft sprocket, rather than the stock 16. The 400 does about 4,900rpm. Ironically the 400 feels less strained on the highway than the 500. This is important because both engines feel strained at 100kph. They are both capable of running all day at that rpm, but unless you’re a petrol head or are used to making bikes scream, you might find your sense of mechanical sympathy causes you to wince, and to prefer 90kph. For this reason the SRs are not great highway touring bikes. They can do it, they have done plenty of it over the years, and I have done 600 to 700km days many, many times. But I have to constantly over-rule the nervousness that the strain arouses in me with the knowledge of the cold fact that I’m doing no damage. And I find that my throttle hand feels over-worked by the day’s end, as though strained in sympathy with the tension of the bike. You have to remember that the SR is essentially the XT500 dirt bike tarted up with street-going clothes. It has the dirt bike’s gear ratios. To be fair however, I really only notice this on my long Mallee rides - on straight hot roads that stretch ahead with no change of direction or heat. The sensation of strain seems much less apparent on winding roads even when riding for a long time. The ambient temperature also makes a difference - the SR likes the cold rather than the heat.
link to the thread
, you might find it of interest.