Author Topic: CB350f (400) - big bore time  (Read 4419 times)

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 4828
    • View Profile
Re: CB350f (400) - big bore time
« Reply #75 on: November 24, 2019, 03:51:32 PM »
I keep my fingers crossed you have no leaks. That area is quite oil free really, its just the area around the oil return paths / dowels / studs, that usually leak if anything. I can see this bike being back on the road by Christmas, you are making great progress 😊😊😊
« Last Edit: November 24, 2019, 03:53:09 PM by Nurse Julie »
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Erwin83

  • SOHC Associate
  • Posts: 95
    • View Profile
Re: CB350f (400) - big bore time
« Reply #76 on: November 24, 2019, 06:14:30 PM »
That may be possible, but once the engine is back together, I also have some wishes with the exhaust. I currently have a 4-2 based on the original header pipes of the 350f. I have the ambition to make it 4-4 again with 4 open peashooters.
CB350f with 400f engine

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 4828
    • View Profile
Re: CB350f (400) - big bore time
« Reply #77 on: November 24, 2019, 06:17:31 PM »
That may be possible, but once the engine is back together, I also have some wishes with the exhaust. I currently have a 4-2 based on the original header pipes of the 350f. I have the ambition to make it 4-4 again with 4 open peashooters.
Haha, I love pea shooters, I have had them on many of my old British bikes and they sound great.
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Erwin83

  • SOHC Associate
  • Posts: 95
    • View Profile
Re: CB350f (400) - big bore time
« Reply #78 on: November 29, 2019, 09:17:08 PM »
Got the head back on.
And to show I do occasionally take advice (...), a pic of the boots with brand new original JIS screws instead of the fancy brass ones.

BTW, head nuts tightened to 22Nm, with the 10 copper washers and yes, I even ordered the 2 special washers with rubber inserts at 6,50 euro a piece. That hurt a bit...
CB350f with 400f engine

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 4828
    • View Profile
Re: CB350f (400) - big bore time
« Reply #79 on: November 30, 2019, 04:23:35 PM »
Got the head back on.
And to show I do occasionally take advice (...), a pic of the boots with brand new original JIS screws instead of the fancy brass ones.

They look a lot better 👍👍👍👍
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Erwin83

  • SOHC Associate
  • Posts: 95
    • View Profile
Re: CB350f (400) - big bore time
« Reply #80 on: November 30, 2019, 09:32:21 PM »
Starting to look like an engine again.

Valvecover installed, so the valves are opening and closing again. I still get a bit anxious when setting cam shaft timing. I must have checked a dozen times and still turned the crank to a position that no piston was at tdc when the cover went on.

Also renewed the seal of the tacho drive as well, and obviously all O-rings.

Feels very smooth when turning with the kickstart by hand.
CB350f with 400f engine

Offline Erwin83

  • SOHC Associate
  • Posts: 95
    • View Profile
Re: CB350f (400) - big bore time
« Reply #81 on: December 02, 2019, 08:53:14 PM »
Engine all buttoned up. Got a nice boop-boop-boop-boop on the kickstart showing signs of compression (there's no exhaust yet) and needs a good amount (not too much, not too little) of force on the kick starter.
Dared to push the starter button and that sounded very normal.

Next, exhaust, throttle cables, clutch, and some small other stuff.

Tbc
CB350f with 400f engine

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
  • SOHC Jedi
  • Posts: 4828
    • View Profile
Re: CB350f (400) - big bore time
« Reply #82 on: December 02, 2019, 09:05:38 PM »
What a lovely sound...... Boop, Boop, Boop... Its very encouraging 👍👍👍
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new