Author Topic: Starting off  (Read 530 times)

0 Members and 1 Guest are viewing this topic.

Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Starting off
« on: June 21, 2020, 12:43:35 am »
Good morning all, I've been given a 400f to get back on the road, I've noticed that when pulling off I need to rev the bike quite hard and ride the clutch a little or the engine bogs down a little. Otherwise it rides well and Shifts as normal once moving. Is this nature of the beast or does something need adjusting or changing? I'm used to more modern bikes which will pull off at next to no throttle

Sent from my VOG-L09 using Tapatalk
« Last Edit: June 21, 2020, 01:32:26 am by philcarroll_1985 »

Offline jgger

  • Expert
  • ****
  • Posts: 1,367
Re: Starting off
« Reply #1 on: June 21, 2020, 08:50:39 am »
I would say to start, check your spark plugs, timing , timing advance, and air cleaner. Any of those out of whack may allow it to "sound" good but be under powered.
"The SOHC4 uses a computer located about 2-3 ft above the seat.  Those sometimes need additional programming." -stolen from  Two Tired

Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Re: Starting off
« Reply #2 on: June 21, 2020, 09:47:47 am »
I'll have a look at the timing. Can that be done by a novice with the manual easily?

Sent from my VOG-L09 using Tapatalk


Offline Alan F.

  • We remember the Night Rider, and we know who you are.
  • Old Timer
  • ******
  • Posts: 4,685
Re: Starting off
« Reply #3 on: June 21, 2020, 10:18:07 am »
Full tune up, even if just a verification of proper adjustment without changing any parts.

You can do it with a good manual in hand. Beware of aftermarket service manuals and start threads here if questions arise.

Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Re: Starting off
« Reply #4 on: June 21, 2020, 10:35:07 am »
What's the best one to go for? Haynes?

Sent from my VOG-L09 using Tapatalk


Offline Alan F.

  • We remember the Night Rider, and we know who you are.
  • Old Timer
  • ******
  • Posts: 4,685
Re: Starting off
« Reply #5 on: June 21, 2020, 11:13:09 am »
Here you go, download whatever you may need for your bike, links are all in reply #1:

http://forums.sohc4.net/index.php/topic,17788.msg184793.html#msg184793

Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Re: Starting off
« Reply #6 on: June 25, 2020, 07:49:15 am »

I tried using this method today but my test lamp didn't light up at any stage, any ideas why? I tested the lamp on the battery and it lit up so no faulty lamp

Sent from my VOG-L09 using Tapatalk


Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Re: Starting off
« Reply #7 on: June 25, 2020, 07:54:51 am »
Ignore the above, absolute novice mistake, kill switch was on

Sent from my VOG-L09 using Tapatalk


Offline Alan F.

  • We remember the Night Rider, and we know who you are.
  • Old Timer
  • ******
  • Posts: 4,685
Re: Starting off
« Reply #8 on: June 25, 2020, 07:57:50 am »
That happens to everyone eventually, glad you were at home.

Offline philcarroll_1985

  • Full Member
  • *
  • Posts: 13
    • https://www.facebook.com/philcarroll.1985
Re: Starting off
« Reply #9 on: July 08, 2020, 12:21:41 pm »
On the same/similar topic, I'm having trouble starting the bike from cold. What I have done so far is

Fresh petrol,
New battery,
New plugs,
Fresh oil and filter,
Air filter,
Stripped and cleaned carbs - set up on bench following a post I've seen on here,
Static ignition timing as per video in previous post,

It will start with easy start but still relevantly. When it does start it will only idle with around 2k, anything less and it will die off

I've searched through here for tips but I'm at a loss what to check next, any thoughts would be greatly appreciated

Sent from my VOG-L09 using Tapatalk


Offline The Lone Builder

  • Hot Shot
  • ***
  • Posts: 377
  • "Still running against the wind"
    • Belfast-2-Belfast-By-Bike
Re: Starting off
« Reply #10 on: July 28, 2020, 04:16:42 am »
Underneath the air filter there is another filter element that filters blow-by gases. I’m not sure if that would cause or contribute to your problem, if it’s clogged.

Worth a check and can be replaced by a piece of scotchbrite if its in bad state.
CB750 K2 - No longer running, now we’re flying!!
CB750 K1 - The less, said the better!
CB450 K1 - Stalled.
CB400F Supersport - It's rusty!

Follow my journey through Africa @ http://Belfast2BelfastByBike.com