« previous next »
Pages: [1]   Go Down

Author Topic: cylinder goop  (Read 208 times)

0 Members and 1 Guest are viewing this topic.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,437
  • Saver of unloved motorcycles.
cylinder goop
« on: March 11, 2025, 10:54:26 AM »
 yuk. This is what the fins collect.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,217
  • CB500 Number 1000036
Re: cylinder goop
« Reply #1 on: March 11, 2025, 12:07:39 PM »
That is external sh1te heated up
Logged
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Online BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 10,538
  • 1969 cb750
Re: cylinder goop
« Reply #2 on: March 11, 2025, 12:56:49 PM »
……It’s amazing what you can find in there!
Logged

Offline M 750K6

  • Hot Shot
  • ***
  • Posts: 325
Re: cylinder goop
« Reply #3 on: March 15, 2025, 03:18:00 PM »
Looks like my wife's rice pudding  :)
Logged

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,437
  • Saver of unloved motorcycles.
Re: cylinder goop
« Reply #4 on: March 15, 2025, 03:26:00 PM »
 55 years of oil, dust and bugs, it seems weird that there's an engine passage open to air except for the gasket.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline HondaMan

  • Someone took this pic of me before I became a
  • Really Old Timer ...
  • *******
  • Posts: 14,231
  • ...not my choice, I was nicknamed...
    • Getting 'em Back on the Road
Re: cylinder goop
« Reply #5 on: March 15, 2025, 07:07:59 PM »
That's raw crude!
:)
Logged
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: SOHC4shop.com  (Note: no longer at www.SOHC4shop.com, moved off WWW. in 2024).

Offline PeWe

  • Really Old Timer ...
  • *******
  • Posts: 15,835
  • Bike almost back to the 70's 2015
Re: cylinder goop
« Reply #6 on: March 16, 2025, 12:13:56 AM »
I did not trust trust the base gasket to stop sand and dirt from come inside when taking off the cylinder.

I plugged the holes with JB Weld, ca 8-10mm thick. 2k clay wariant as a bottom, filled up with 2k epoxy. Drilled a few small holes in the aluminium to give it more grip.
I could have made the JB Weld epoxy thicker to improve the stability. 25mm or more.

The big sleeves vs RCS gasket. Not much material left for gasket. Sleeves not the widest, OD 74.5mm (ID 70mm)



(There are o-rings with tight fit around sleeves pressed down before filled up with sealer.)
« Last Edit: March 16, 2025, 02:30:27 AM by PeWe »
Logged
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967
Pages: [1]   Go Up
« previous next »