« previous next »
Pages: [1]   Go Down

Author Topic: Response to throttle  (Read 863 times)

0 Members and 1 Guest are viewing this topic.

Offline Shepusa

  • Full Member
  • *
  • Posts: 15
Response to throttle
« on: May 29, 2018, 03:02:12 PM »
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
Logged

Offline flybox1

  • My wife thinks I'm a
  • Really Old Timer ...
  • *******
  • Posts: 14,289
Re: Response to throttle
« Reply #1 on: May 30, 2018, 06:50:47 AM »
+1 to calj.
4000rpm is below the power-band.
My cruising rpm was always +/- 6000.  Nothing but good things above that  ;D
Logged
'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
1974 550K0 (stock), 1973 CB350F (stock), 1983 Yamaha XS400K (POS)
77/78 cool 2 member #3
"Knowledge without mileage equals bullsh!t" - Henry Rollins

"This is my CB. There are many like it, but this one is mine…"

Offline Shepusa

  • Full Member
  • *
  • Posts: 15
Re: Response to throttle
« Reply #2 on: May 30, 2018, 04:02:51 PM »
Thanks guys, I will try that.
Logged

Offline Shepusa

  • Full Member
  • *
  • Posts: 15
Re: Response to throttle
« Reply #3 on: June 02, 2018, 09:39:30 AM »
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

Logged
Pages: [1]   Go Up
« previous next »