After shattering my kneecap and having a miserable recovery time, and being into my forties now, I decided I really should put a cap on the fast bike thing. A fairly stock 8-valve gs750 goes plenty fast enough for me, although I do desire a little bit more at times, it is very much faster than anyone needs to reasonably travel, but I cannot resist!
Fellow GSR member Norm jokingly said when I was quizzing people about what engine I should put in this old school Rickman race chassis, that I should put a Honda CB200 engine into the chassis formerly occupied by a Kawasaki Z1 engine & prepped for a GS1100E engine, "that way everyone has a chance to catch up to you in the twisties" he said!
Having a little extra low-rpm torque would be nice, as the early 400, 550, & 750 had high duration high RPM camshafts, where the 650, 850, and 1000 had cams that were a little more street friendly with slightly lesser duration. The high rpm longer duration cams translate into the 2 stroke syndrome - "I just can't help it, the bike just wants to go fast!" They begged to be revved up higher into the RPM range and be ridden more rowdy, as they aren't terribly satisfying at 3000 or 4000 RPM...
A long time ago I came to the realization of what makes a very fast bike. I deemed the approximate 100 horsepower mark as an EXTREMELY fast bike on anything that is lighter than the average Harley-Davidson clunker.
Last night a gentleman with more a significant amount of more seniority on this Earth than myself, jokingly was whining about how he was going from a 150 or 160 horsepower bike and stepping down to a bike with only 125 horsepower...
I suppose the older guys that are doing sport touring really need that extra power, but I thought to myself, wow, 100 horsepower is an immense amount of power and speed capability on a two-wheeled machine, someone of that demographic I had trouble grasping the need for that much power I very seldom see anyone rocketing around like a twenty-year-old squid on a bike typically owned by those with a few more decades seniority than myself...
I still can't help but twist that throttle a lot, drag racing onto the highway every time I am on an entrance ramp, and no holds barred on the remote twisty roads in the Appalachian hills and mountains...
It doesn't take 100 HP to ride fast!
I have several GS1000 engines here, and one GS1000, and the Rickman road racer and a GS1000 and a stroker crank and a spare stock stroke welded crankshaft and a bunch of 1100G D-port top ends...+ Yoshimura cams + Keihin CR33 smoothbores...
I will probably build an 1120cc stroker at some point just because I have the parts, but at this point, I would probably not have gone out of my way to purchase all of this stuff with my current mindset... Which is referencing my mortality and fading youthfulness and the associated rapid healing characteristics that come with it. Even before my fall and knee surgery, I had been more of the mindset of building a very light vintage red racer type lightweight / middleweight Suzuki GS, and trying to squeeze the most power and efficiency out of a 550 / 650 and a 400 / 425 engine... But still that would mean a high revving beastly little powerhouse that wants to be ridden fast!
I think an 8v 77-79 GS750B/C/N/E with a Wiseco K844 kit, good tires, & a brake upgrade is an absolute superb all around bike... 96cc extra over stock brings more street torque to the plate...
Although a 67mm 11:1 798cc GS750 is appealing, as the smaller pistons are a bit lighter weight and really like to spin up fast...the 77-81(82?) 8v 550's are a pretty superb bike even, after a 4-1 & K&N air filter swap & re-jetting.... GS650E (& for shafty fans, the 650G) in my opinion is one of the best all-rounder vintage bikes ever built,a potent and efficient modern piston/combustion chamber/intake runner top end design, in a more compact slightly lighter package...+dual twinpot discs... I'm building 2 77-79 550's with these top ends and adding a missing brace to the spine of the frames that the 750 got but the 400/425 & 550 did not get, as I love the 77-79 GS stylings (seat and tail) the most vs the 650's & 1000's etc
I suppose one of the less obvious sidestepped answers to my question posed above as to why people need bikes with such high horsepower, would be that perhaps some people can resist the urge to twist the throttle more than myself!
Enough ramblings for now, on to the post I would have liked/hearted if the forum had that option!
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