Crusing RPM's

[Freerider90]

Hey Y'all just got a 1979 Honda Limited Edition CB750. Love the heck out of it and drive it all the time but I have a question: what is the ideal Engine RPM for this bike? It runs about 4600@ 60, is that okay? P.S. I never run the speed limit on this bike, I usually go about 70-75 mph.

[sjackson]

that sounds about right. what gear?

p.s. I just got the same exact bike. I love it, in spite of all the problems I've had with it recently.

[Freerider90]

That's in fifth gear. Another question: For crusing fast, do I need to worry about damageing the bike? It is thirty years old after all, even though it hasn't given me any trouble yet

[sjackson]

Not if it's running good. 4000RPM is far from wide open throttle on these bikes. I would only be concerned if you thought the bike was running lean or if you had the wrong spark plugs in there.

[Freerider90]

Thanks for the advice, that's one less thing to worry about. Hope you get your bike running right soon.

[ccRider246]

When riding normally, I shift around 4k. Between 4500 and 5000 rpm I get a bit more engine noise but once I hit about 5000 rpm it smooths out considerably. Probably the smoothest operation comes with rpm over 5000. The bike seems to settle in at that point. I ride 70 - 75 on the interstate with no problem. It still has plenty of torque in 5th gear to pass promptly. On back roads I can run for hours at 60-65 mph and it runs very smoothly. The only place I get that extra buzzy noise is between 4500 and 5000 rpm, regardless of gear.