Author Topic: Points advance unit  (Read 1314 times)

Offline Matt_Harrington

  • SOHC Pro
  • Posts: 835
    • View Profile
Points advance unit
« on: November 10, 2023, 09:19:58 AM »
Should one be able to dismantle the advance/retard unit? My spare unit is really stiff and the cam section seems to be reluctant to withdraw from the plate.
Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400

Offline McCabe-Thiele (Ted)

  • Grogu
  • *
  • Posts: 6289
    • View Profile
Re: Points advance unit
« Reply #1 on: November 10, 2023, 10:27:02 AM »
Pretty sure they come apart when the springs are off much like the Lucas car type.
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Offline ka-ja

  • ken
  • SOHC Pro
  • Posts: 737
  • yoshi 460
    • View Profile
Re: Points advance unit
« Reply #2 on: November 10, 2023, 01:01:56 PM »
Yes, they do come apart easily, starting with the springs, but mark the position of the cam first, it can fit 180 degrees wrong on reassembly.
« Last Edit: November 10, 2023, 02:33:08 PM by ka-ja »
nice bike,nothing in the bank

Offline Matt_Harrington

  • SOHC Pro
  • Posts: 835
    • View Profile
Re: Points advance unit
« Reply #3 on: November 10, 2023, 01:51:20 PM »
Thanks. It's going to need persuading!!
Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400

Offline McCabe-Thiele (Ted)

  • Grogu
  • *
  • Posts: 6289
    • View Profile
Re: Points advance unit
« Reply #4 on: November 10, 2023, 02:29:27 PM »
Might need soaking overnight in Evaporust or similar.
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Offline Matt_Harrington

  • SOHC Pro
  • Posts: 835
    • View Profile
Re: Points advance unit
« Reply #5 on: November 10, 2023, 03:33:12 PM »
Now apart! It required some effort and now needs a serious clean....
Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400

Online Oddjob

  • SOHC Jedi
  • Posts: 4296
    • View Profile
Re: Points advance unit
« Reply #6 on: November 10, 2023, 04:56:11 PM »
You could copy what I did with mine Matt, paint in the markings so they stand out when your timing the engine. I did the T marks in red and the F marks in white so they'd really shine under a strobe for instance.

Kids in a the back seat cause accidents.
Accidents in the back seat cause kids.

Offline Laverda Dave

  • SOHC Jedi
  • Posts: 2582
  • Health is wealth
    • View Profile
Re: Points advance unit
« Reply #7 on: November 10, 2023, 09:05:20 PM »
Excellent idea Ken, I'll be doing that as trying to see timing marks in daylight with old eyes and wearing glasses is a pain.
1976 Honda 400/4
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1978 Honda CB400/4 'Rat' bike
1982 Laverda 120 Jota

Offline Craizeehair

  • SOHC Member
  • Posts: 149
    • View Profile
Re: Points advance unit
« Reply #8 on: November 11, 2023, 08:57:08 AM »
You could copy what I did with mine Matt, paint in the markings so they stand out when your timing the engine. I did the T marks in red and the F marks in white so they'd really shine under a strobe for instance.


That’s a good idea, works very well. What paint did you use for that?

Offline Matt_Harrington

  • SOHC Pro
  • Posts: 835
    • View Profile
Re: Points advance unit
« Reply #9 on: November 11, 2023, 09:51:27 AM »
Ken, I did see that a while ago when you posted it. Excellent idea and I'll do something similar, depending on which Humbrol paints are to hand....
Matt
___________________________________
CB400F 1976 -  Almost finished
CB400F 1977 - On the road!
Moto Guzzi Le Mans 2 - 1981 (undergoing a spruce up)
CD175 - To be restored
Triumph Speed 400

Offline McCabe-Thiele (Ted)

  • Grogu
  • *
  • Posts: 6289
    • View Profile
Re: Points advance unit
« Reply #10 on: November 11, 2023, 12:55:19 PM »
I would avoid just siliver.
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Online Oddjob

  • SOHC Jedi
  • Posts: 4296
    • View Profile
Re: Points advance unit
« Reply #11 on: November 11, 2023, 02:18:18 PM »
You could copy what I did with mine Matt, paint in the markings so they stand out when your timing the engine. I did the T marks in red and the F marks in white so they'd really shine under a strobe for instance.


That’s a good idea, works very well. What paint did you use for that?

I always use the small pots of Humbrol modelling paint, they last, have a great range of colours and aren't all that expensive. I do the writing on the handlebar switches as well. Also done the seat lock arrow and the black on the rotor cover badges. It lasts and is quite resistant to heat and UV.
Kids in a the back seat cause accidents.
Accidents in the back seat cause kids.

Offline McCabe-Thiele (Ted)

  • Grogu
  • *
  • Posts: 6289
    • View Profile
Re: Points advance unit
« Reply #12 on: November 11, 2023, 03:24:01 PM »
You must have a very small brush Ken or do you use one of those blunt syringes?
Honda CB500 K1 (new pit dug out ready)
Honda CB400 four super sport (first money pit)
Link to my full restoration http://www.sohc.co.uk/index.php/topic,23291.0.html

Offline Craizeehair

  • SOHC Member
  • Posts: 149
    • View Profile
Re: Points advance unit
« Reply #13 on: November 11, 2023, 03:27:11 PM »


I always use the small pots of Humbrol modelling paint, they last, have a great range of colours and aren't all that expensive. I do the writing on the handlebar switches as well. Also done the seat lock arrow and the black on the rotor cover badges. It lasts and is quite resistant to heat and UV.
[/quote]
Cheers, I will get some ordered

Online Oddjob

  • SOHC Jedi
  • Posts: 4296
    • View Profile
Re: Points advance unit
« Reply #14 on: November 11, 2023, 04:21:40 PM »
With engraving like that on the switchgear and the advance/retard unit for example I just drop enough paint into the engraving to completely fill it plus a little extra as it shrinks as it dries. I wait a day or so and then either scrape the excess off with my fingernail or a cloth soaked in thinners, thinners is easier BUT if the paint underneath is soft it will take that off a well, ceramic coating is unaffected by thinners, powder coated also resists it but try not to press on hard, just lightly brush the top of the excess is best in my experience. If it's soft paint, like rattle can etc then the fingernail is generally best, just be careful. The problem with the thinners is that it can and does wick down and remove paint inside the engraving as well, which is what happened on my 500 rotor cover on the Made in Japan writing.

Sometimes it's trial and error, find what works best for you. If you don't like having long fingernails for instance ask the wife if she has some spare acrylic nails, they may work.
Kids in a the back seat cause accidents.
Accidents in the back seat cause kids.

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal