« previous next »
Pages: [1]   Go Down

Author Topic: plugging ports  (Read 750 times)

0 Members and 1 Guest are viewing this topic.

Offline beemerbum

  • Expert
  • ****
  • Posts: 1,056
plugging ports
« on: February 25, 2020, 08:35:23 am »
I want to pressure wash my 750 motor before I start some disassembly. The exhaust and carbs are off. What would be an effective way to plug uo the intake and exhaust ports?
Logged

Offline pjlogue

  • Expert
  • ****
  • Posts: 971
Re: plugging ports
« Reply #1 on: February 25, 2020, 08:56:47 am »
When I prepped my motor for cleaning and painting I used 1.25" (I think that was the size) rubber end caps with hose clamps.  The kind you find in the plumbing section a Lowes/Home Depot.  Make sure your exhaust nipples are seated tight otherwise the water can get in where the coper crush washer is.  I would avoid directly blasting the rubber caps just in case.

-P,
Logged

Offline newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,105
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: plugging ports
« Reply #2 on: February 25, 2020, 12:38:33 pm »
Quote from: pjlogue on February 25, 2020, 08:56:47 am
When I prepped my motor for cleaning and painting I used 1.25" (I think that was the size) rubber end caps with hose clamps.  The kind you find in the plumbing section a Lowes/Home Depot.  Make sure your exhaust nipples are seated tight otherwise the water can get in where the coper crush washer is.  I would avoid directly blasting the rubber caps just in case.

-P,

1 1/2" exhaust. 1 7/16" intake
Logged
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline CaptFatCat

  • Full Member
  • *
  • Posts: 79
Re: plugging ports
« Reply #3 on: February 25, 2020, 01:01:32 pm »
I use the mushroom shaped corks from my wifes wine bottles. they fit perfect and seal air tight. and she has plenty of them!
Logged
Resurrecting a Herman Munster CB750 from a few old baskets of K2 and K7 parts.

Offline seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 10,781
Re: plugging ports
« Reply #4 on: February 25, 2020, 06:04:21 pm »
I used condoms on the exhaust spigots one time...seriously!  They worked too!  Plus, you can turn the engine with the kickstart and do a condom inflation compression test. lol
Logged
If it works good, it looks good...

Offline Jeff10

  • Full Member
  • *
  • Posts: 7
Re: plugging ports
« Reply #5 on: March 01, 2020, 10:23:33 pm »
Here is how I do it.
Logged

Offline beemerbum

  • Expert
  • ****
  • Posts: 1,056
Re: plugging ports
« Reply #6 on: March 02, 2020, 01:52:13 pm »
What is the size of the rubber plugs in the exhaust?
Logged

Offline Jeff10

  • Full Member
  • *
  • Posts: 7
Re: plugging ports
« Reply #7 on: March 03, 2020, 10:39:19 am »
Size 8, #52039 Hillman Rubber Stoppers (I think Lowes has them in the US). Top size is 1-5/8, bottom is 1-5/16.
Logged
Pages: [1]   Go Up
« previous next »