« previous next »
Pages: [1]   Go Down

Author Topic: F2 spark plugs stuck  (Read 363 times)

0 Members and 1 Guest are viewing this topic.

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,162
  • Saver of unloved motorcycles.
F2 spark plugs stuck
« on: December 01, 2022, 10:49:24 AM »
 This is a "removed" head from an F2 that spent time outside. The center two plugs are extremely tight, I've expended the usual amount of force and tried my battery impact but I don't want to break them off. I'm soaking them with Kroil from the combustion chamber side and am in no hurry.
  Ideas or suggestions? I believe they are NGK's so I have a chance, unlike the brittle Champions I did battle with once before. 

 Maybe heat the entire head in the gas grille like I did a cylinder recently?
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 newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,532
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: F2 spark plugs stuck
« Reply #1 on: December 01, 2022, 11:37:52 AM »
Maybe a hand impact on the socket and yes heat
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 BenelliSEI

  • Really Old Timer ...
  • *******
  • Posts: 10,224
  • 1969 cb750
Re: F2 spark plugs stuck
« Reply #2 on: December 01, 2022, 12:49:08 PM »
Don.... definitely heat. That’s what ultimately freed up the barrel portion on my engine. I’d warm the entire lump up to 250F in an oven or BBQ. In theory the head should expand more than the plug... Cool the plug with a shot of brake Kleen just before you hit with the impact gun. Good luck!
Logged

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 20,162
  • Saver of unloved motorcycles.
Re: F2 spark plugs stuck
« Reply #3 on: December 01, 2022, 02:25:14 PM »
  I did all that and broke them anyway. My brother drug this bike home from Missouri and I've junked almost every part off of that wasn't already robbed. What a waste of hours. I did keep the entire rear swingarm assembly pedals and rear brake.
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.
Pages: [1]   Go Up
« previous next »