Author Topic: Hi  (Read 464 times)

Offline Brett72

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Hi
« on: November 18, 2020, 09:23:48 PM »
Hi everyone. Thanks to Julie Seal for the recommend to the site.  I am new to the CB750 K series but i have purchased a K5 frame and its engine is a K6 which have come from the States There are lots of bits missing and i will be constantly on the look out for bits but more importantly it will be great to draw on all your knowledge  and experience if you don't mind.  Looking forward to seeing some of your rides, either standard or cafe. Not sure which way i want to go yet.  Cheers

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: Hi
« Reply #1 on: November 18, 2020, 09:30:39 PM »
Welcome to the Forum Brett, I'm pleased you found us. . Enjoy your project.
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline Brett72

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Re: Hi
« Reply #2 on: November 18, 2020, 09:33:27 PM »
Thankyou. I think its going to be a long hard but enjoyable journey

Online philward

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Re: Hi
« Reply #3 on: November 18, 2020, 09:38:04 PM »
Welcome Brett, I built a CR750 Replica from a spare frame I acquired - do-able but you have to watch your budget as it all adds up - but thats the same if you buy a complete project and mint it
Good luck whatever way you go!
Current Bikes:-
Kawasaki ZZR1100D3
Honda CB750K2
Honda CR750 Replica
Kawasaki ZZR250 1990 Project (Not started)
Honda CB500K2 (1973) Project

Offline Brett72

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Re: Hi
« Reply #4 on: November 18, 2020, 09:40:18 PM »
Cheers Phil

Offline K2-K6

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Re: Hi
« Reply #5 on: November 18, 2020, 09:53:22 PM »
Welcome to the forum, hope you have fun with the bike as they are great to own and run.

Offline Brett72

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Re: Hi
« Reply #6 on: November 19, 2020, 09:39:11 AM »
Morning all. I have a question for you all. I have just taken the alternator cover off the engine and the windings and casing were covered in old oil. When the oil flow around this engine does it go into the alternator or is it just because the oil seal is old. I have no history about it other than it came to the uk from the states around 3 years ago and has just been stored dryish after obviously being drained prior to transportation.

Offline K2-K6

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Re: Hi
« Reply #7 on: November 19, 2020, 10:23:53 AM »
Yes to oil,  the alternator runs wet on these.

Further,  it's a "dry sump" motor too.  So oil pump has two sections,  one pumping into oil feed and supplied directly from oil tank. The other section of the pump sucks oil from sump pan and returns it to the oil tank (also feeds gearbox from this side) to keep the engine as empty as possible during use.

Offline Brett72

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Re: Hi
« Reply #8 on: November 19, 2020, 10:32:31 AM »
Thanks Jedi. Your information is invaluable 👍

Offline Laverda Dave

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Re: Hi
« Reply #9 on: November 19, 2020, 01:59:18 PM »
Welcome to the forum Brett, enjoy yourself over the winter with the rebuild.
1976 Honda 400/4
1981 Honda CB250RSA
1977 Rickman Honda CR750
1999 Honda VFR 800FX
1955 750 Dresda Triton
1978 Moto Morini 350 Sport
1982 Laverda 120 Jota
1924 Triumph 550SD
2012 Stanley Battery Drill

Offline Moorey

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Re: Hi
« Reply #10 on: November 19, 2020, 02:03:26 PM »
Welcome to the forum and have fun.

Offline Macabethiele (Ted)

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Re: Hi
« Reply #11 on: November 19, 2020, 08:05:40 PM »
I'm enjoying my 400/4 rebuild so far - as regards to the cost you will probably have a mental budget that like a house build you will get to the point of no return so just keep on spending until it's finished.

My spend so far is just under my initial budget estimate although clearly I will end up with a final spend that far exceeds it's final value as I haven't started on the engine properly yet.

I keep telling myself that if I played Golf instead then at least at the end of 12 months I have something physical to show for my efforts. I can in my head think of no end of self justifications.lol
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Brett72

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Re: Hi
« Reply #12 on: November 21, 2020, 10:12:51 PM »
An interesting day. Started to take the engine apart to see what it was like inside and as you can see the evidence of being sat for years ( not sure how many). On the plus side everything came apart easily and nothing was seized.

Offline Macabethiele (Ted)

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Re: Hi
« Reply #13 on: November 22, 2020, 12:02:13 AM »
Cylinder No:1 has some crud on the piston crown!
Is that a reflection of the piston tops on the bores or is it corroded ?
« Last Edit: November 22, 2020, 12:04:29 AM by Macabethiele »
Honda CB400F2 under restoration
Jeep Grand Cherokee WJ
Jeep Grand Cherokee WK
Mercedes R129 SL500

Offline Brett72

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Re: Hi
« Reply #14 on: November 22, 2020, 07:54:42 PM »
The bores are actually ok, nothing a quick hone cant sort out. just need to give the pistons a good clean and a new set of rings. In 2 minds wether or not to take the bottom half apart. There doesn't seem to be any excess movement in the con rods and everything feel smooth. Whats peoples opinions?

 

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