Topic: Response to throttle

[Shepusa]

Got my 73 350F on the road. Have a question about throttle reponse when riding.
At steady speed - say 40mph in 5th - a bit below 4000rpm when I give more throttle the bike stutters / hesitates then will pick it up and go. Sometimes it works better when I roll off the throttle for a second and then apply.
Thoughts on how to troubleshoot, and what it might be ?

Thanks folks

Simon

[calj737]

Yeah, stop lugging your motor!  4k rpms in 5th gear is on the low end, so whacking the throttle will produce those results. These are not fuel injected, electronically controlled engines; they're mechanical carbs and the motor needs high revs to perform. Downshift, rev up above 6k and see how it goes.

Too many think because these bikes are 40 years old they need to be nursed along. Couldn't be further from the truth. If you want it to last and run well, run it up the tach. 6k-9.5k is the sweet spot for the motor. Riding around at 2.5k-4k will make for an unhappy motor.

[flybox1]

+1 to calj.
4000rpm is below the power-band.
My cruising rpm was always +/- 6000.  Nothing but good things above that 

[Shepusa]

Thanks guys, I will try that.

[Shepusa]

Update
Went for a run today and keeping it up the revs seemed to help. To be honest on the country roads I am riding on I would probably have to be in third at 40 to keep it close to 6000.
Does that sound right for gearing ?

Also, I have been leaning up the mix as the plugs are sooty black when I pull them but that is perhaps also aggravated by not keeping the revs up.

Could the choke be set in the wrong position. It starts first touch with no choke ?

Thanks
Simon

[calj737]

Update
Went for a run today and keeping it up the revs seemed to help. To be honest on the country roads I am riding on I would probably have to be in third at 40 to keep it close to 6000.
Does that sound right for gearing ?  Yes

Also, I have been leaning up the mix as the plugs are sooty black when I pull them but that is perhaps also aggravated by not keeping the revs up. Caution: only evaluate your plugs with fresh clean plugs based upon specific throttle positions. If you ride, then pull your plugs, you have no earthly idea which throttle position is causing them to soot up.

It is also possible that you have some weak spark issues...

Could the choke be set in the wrong position. It starts first touch with no choke ? You would not be the first to operate the choke in reverse. The choke lever should be "down" for the choke to OFF. Up, the butterfly valves are closed, thereby restricting airflow and enriching your AF mix. Which way are you riding it?