Honda CB750 Sandcast

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Messages - mcrider

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1
Everything K0 / Re: 1969 Diecast/ K0 restoration
« on: January 03, 2013, 09:33:27 am »
Quote from: UK Pete on January 03, 2013, 03:56:39 am
Thanks for that Bowswell, luckily i have still got the cases apart so i can do that , anything the late great Axl recommends is usually well researched and worth doing
Pete
Granted, and with all due respect to Axl, RIP.

However, regardless of source, I always recoil a bit when I'm told to do something someway with no reason for it, especially when we have eyewitness accounts that the factory did not do it that way.

Practically, it probably doesn't matter a whit for all the miles most of us will put on a restored engine.

I should say to complete the post, that i have seen pictures of (supposedly) virgin engines being disaassembled on SOHC4.net, where the chains are both aligned on some and staggerred on others indicating to me the factory didn't care.

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Everything K0 / Re: 1969 Diecast/ K0 restoration
« on: December 17, 2012, 05:39:04 pm »
Quote from: bowswell on December 06, 2012, 02:07:58 pm
Yes,I can't find tread in soch4 forum or in HONDAMAN book.Something about harmonic noise or vibration in hi rpm.
This has been discussed many times at SOHC.net and is a pet of mine. I have reviewed many pictures of virgin lower ends and there is NO consistency from the factory as to whether the chains should be synched or staggered. Many people have stated that they should be one way or another, but there is no verifiable back up to either position. I am open to anything scientific one has to say.

I received this as a PM from HondaMan: "I'll make a post of this when I can get my picture, later, but...I just disassembled a virgin 750K7 engine and found painted-on timing 'marks' on the primary chains, and they align the plate-to-plate setup we were kicking around earlier. So, it looks like Honda aligned them instead of staggering them, when new." With his permission. "We were kicking around earlier" refers to the conversation he and I had on the subject.

 This is not conclusive as I have seen at least 2 virgin bottom ends where the chains were staggered. This leads me to believe Honda didn't care.  The chains in my current project are synched. FWIW.
Ron

3
General Discussion / 9 hole clutch cover
« on: December 14, 2012, 05:32:36 pm »
Hello: newbie to the forum, sort of. Just come when I need something, LOL.

I have a 9 holer for sale. Its been polished. (is that good or bad or neutral)  Opinions as to value. This is not a for sale post, just a question. I'll post it to classifieds when the time actually comes.

Ron

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