Author Topic: 750 K1 project  (Read 4642 times)

Offline Crispy

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750 K1 project
« on: March 31, 2018, 04:39:09 PM »
I acquired my valley green K1 a couple of months ago, its a US import in need of some attention. I have just started to spend some time on it as youve probably gathered from some of the posts i've already made. I'm really pleased to have joined this group because i have already received a lot of help and advice and found loads more information through reading other members posts and projects. Thanks.. its much appreciated.
The bike is now stripped and parts sorted,labelled and stored until ready to be dealt with. I thought i would make a start on the motor and I now have it cleaned and on a stand (thanks Julie!) but have been brought to a standstill on that front by the 3 breather cover screws on the rocker cover. All are seized solid. JIS impact driver wouldnt loosen them nor heat or penetrating oil, drilling the heads off made no difference, the cover still wouldnt come off.
I have after a week or so got the breather cover off and two of the screws out completely but one stubborn bu#8er will not come out and is holding the rocker cover on with it!...I will get it out eventually! :)
I have the forks stripped and ready to go for hard chroming, the seat is covered and just needs a couple of finishing touches (done while waiting for the penetrating oil to work its magic!).. Im really enjoying this!

Offline Crispy

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Re: 750 K1 project
« Reply #1 on: April 02, 2018, 11:12:13 AM »
I've eventually managed to remove the rocker cover without causing any damage, and am about to start dismantling the camshaft and cylinder head, keeping my fingers crossed that I won't find anymore stubborn fasteners. I have the Honda workshop manual and have read a lot of threads but does anybody have any advice before I take the plunge dive in?  :-\
Cheers!
« Last Edit: April 02, 2018, 11:15:35 AM by Crispy »

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: 750 K1 project
« Reply #2 on: April 02, 2018, 12:09:01 PM »
Slow, steady, methodical.
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 Spitfire

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Re: 750 K1 project
« Reply #3 on: April 02, 2018, 12:17:28 PM »
Not an expert at all, but I usually lay out the engine parts that I remove in the order that I remove them, so that they go back in the same place, before using any violence check thoroughly for hidden bolts, keep everything clean, you do not want even the tiniest of debris in those oilways. Take photos of stuff before you take it apart, pay paricular attention to cable and wiring runs, use plastic bags to keep parts in groups with bolts washers etc. Be patient and have fun

Cheers

Dennis
1976 CB750F

1977 CB750F2 In bits

1964 BSA A65R In bits

2000 NT650V DEAUVILLE

Offline Crispy

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Re: 750 K1 project
« Reply #4 on: April 02, 2018, 10:00:06 PM »
Cheers guys, all tips and advice welcome!
Today I've managed to get the motor top end stripped down, no major traumas and without "using any violence" lol Dennis ! Plus I haven't damaged anything..as far as i know! ::)..  I need to take a few measurements now..pistons,rings bores etc, that will have to wait a while now..work does get in the way!
Ps. I've read threads re the cylinder studs but I didn't realise how slender and flexible they were until I've seen them today in the flesh for the first time, they don't inspire confidence do they? Do I take them out or not hmmm?  :-\
« Last Edit: April 02, 2018, 10:40:28 PM by Crispy »

Offline Crispy

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Re: 750 K1 project
« Reply #5 on: April 09, 2018, 02:41:46 PM »
Guys, Should these clutch release parts look Look this or are they worn?

Offline Trigger

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Re: 750 K1 project
« Reply #6 on: April 09, 2018, 02:44:38 PM »
They look like that so that the ball bearings slide in and out easy. On reassemble, grease the parts and change the balls if rusty or not smooth  ;)

Offline Crispy

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Re: 750 K1 project
« Reply #7 on: April 09, 2018, 02:49:41 PM »
Thanks very much Trigger, ... My balls aren't rusty  ::) so should be ok with a bit of grease!  ;D
« Last Edit: April 09, 2018, 03:41:52 PM by Crispy »

Offline Trigger

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Re: 750 K1 project
« Reply #8 on: April 09, 2018, 02:50:03 PM »
Cheers guys, all tips and advice welcome!
Today I've managed to get the motor top end stripped down, no major traumas and without "using any violence" lol Dennis ! Plus I haven't damaged anything..as far as i know! ::)..  I need to take a few measurements now..pistons,rings bores etc, that will have to wait a while now..work does get in the way!
Ps. I've read threads re the cylinder studs but I didn't realise how slender and flexible they were until I've seen them today in the flesh for the first time, they don't inspire confidence do they? Do I take them out or not hmmm?  :-\

Those head studs look good, leave them alone  ;) ;)

Offline Trigger

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Re: 750 K1 project
« Reply #9 on: April 09, 2018, 03:05:12 PM »
I wish I had customers engines in for rebuilds that looked that good  ::)
Looks like it has never been apart before, what type of oil jets are in the head ? It should be the pepper pot ones  ;)

Offline Crispy

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Re: 750 K1 project
« Reply #10 on: April 09, 2018, 03:46:19 PM »
I wish I had customers engines in for rebuilds that looked that good  ::)
Looks like it has never been apart before, what type of oil jets are in the head ? It should be the pepper pot ones  ;)

Now you're asking! I'll have to find them first. Will look shortly! I don't think it has been apart before....it's looking better than I'd hoped although I need to measure everything yet and see how much wear there is.

Offline paul G

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Re: 750 K1 project
« Reply #11 on: April 09, 2018, 03:48:55 PM »
I wish I had customers engines in for rebuilds that looked that good  ::)
Looks like it has never been apart before, what type of oil jets are in the head ? It should be the pepper pot ones  ;)

Trigger,
               You might want to explaine the pepper pot as they do look more like a salt pot on the top  ;)
Honda CB400 4
Honda CB550 K3
Honda CB750 UK K1 restoration (Finished)
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Kawasaki Z650 cafe racer (ongoing)

Offline Crispy

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Re: 750 K1 project
« Reply #12 on: April 09, 2018, 03:56:11 PM »
This one?  Do they need to come out?

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: 750 K1 project
« Reply #13 on: April 09, 2018, 04:40:12 PM »
Look like salt pot on the top side but pepper pot on the underside if yours are these type. Like this

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Yes, need to come out to be cleaned thoroughly. It can be a  very difficult job to get them out, one usually comes out easier than the other. Sometimes have to almost wreck them to get them out and then re engineer to make good. No longer available OEM or pattern.
« Last Edit: April 09, 2018, 04:42:21 PM by Nurse Julie »
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 Crispy

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Re: 750 K1 project
« Reply #14 on: April 09, 2018, 04:49:08 PM »
Et Voila!  :). Good job you guys know what's What ! You had me worried then with talk of 're-engineering'  :o These two have come out quite easily...which is more than I can say for some the fasteners so far! Can't budge the exhaust stub screws !