« previous next »
Pages: [1]   Go Down

Author Topic: IMD High compression pistons  (Read 794 times)

0 Members and 1 Guest are viewing this topic.

Offline Nob88y

  • Full Member
  • *
  • Posts: 2
IMD High compression pistons
« on: January 31, 2019, 04:03:05 AM »
IMD pistons for the CB750 are sold on Ebay for a reasonable price and sold in UK.  I am toying with idea to buy the +.5 oversize ones. Their advert says suitable for K1-K8 and standard compression for an F2. My bike is a 78 K8 import from US. The standard piston head ad a small dome and the IMD have a larger dome. The chaps who sell them reckon no other mods are needed to heads to heads or cam.  Has anyone got experience of fitting these or comments to make.
Logged

Offline TysMac

  • Full Member
  • *
  • Posts: 1
Re: IMD High compression pistons
« Reply #1 on: November 18, 2019, 02:55:35 PM »
I'm running into the same problem.  I'm trying to use the same pistons on my K7.  I hope somebody has some answers.
Logged

Offline Tracksnblades1

  • My Son was a collegiate competition Trap, Skeet, and sporting Clay
  • Master
  • *****
  • Posts: 1,858
Re: IMD High compression pistons
« Reply #2 on: November 18, 2019, 08:50:44 PM »
This was borrowed from Kenny.....

Originally for F2 vs K valve keepers, but it'll show you why F2 pistons may contact your K head.
Logged
Age Quod Agis

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,972
  • Saver of unloved motorcycles.
Re: IMD High compression pistons
« Reply #3 on: November 18, 2019, 09:10:26 PM »
 I would clay the combustion chamber before running either way. If it says they fit I'd try them. Your 78K should have the 392 head, same as the 75f0 and 76f1.
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 BPellerine

  • Master
  • *****
  • Posts: 2,222
Re: IMD High compression pistons
« Reply #4 on: November 19, 2019, 08:20:29 AM »
they might be 410 pistons he is talking about.bill
Logged
1978 CB 750K ard and webers
another anfob

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,972
  • Saver of unloved motorcycles.
Re: IMD High compression pistons
« Reply #5 on: November 19, 2019, 08:33:45 AM »
 Correct.
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 »