Honda-SOHC

SOHC.co.uk Forums => Project Board => Topic started by: Krzychu on January 18, 2016, 02:31:14 PM

Title: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 18, 2016, 02:31:14 PM
Hi there, so after introducing myself I think it might be time to start a post in here to keep You all up to date on the progress ( if any ) on the restoration of my little " Hania "
I bought the bike back in July '15 from a Polish lad here in NI that wanted to send it to Poland and get it rebuild but the decided not to.
She was starting when I got it ( with a push ) but didn't work in idle. I had the top of the engine removed, checked the bores, pistons, rings and so on. Got it back together with new seals, new valve stem seals, o rings... Put in new spark plugs, new wires and caps. I had the carbs out and cleaned them, got them back in but with no new parts there. New battery and she starts and runs, still not what You would expect but. As the carb boots are old and cracked I think she might be catching some air on the side there, so have to get them ordered and replace as well.

Basically the plan is to get her rebuild to standard spec, but the work will be progressing slowly as there are time and funds limitations :)
I'm a hands on man, love bikes and into mechanics so as far as possible I get it all done myself with the exception of the obvious ie. powder coating and chromes.

All help and advice always welcome, also if You have any questions - shoot :)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 18, 2016, 02:32:58 PM
Some pics of the bike
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 18, 2016, 02:39:06 PM
Old and new seat. Now as I understand some may say that it's a funny way to start with the seat let me explain. My dad back in Poland is working in a company that is rebuilding seat for lorries and they do new upholstery for cars and bikes, so it didn't cost me anything to get it done ;)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 21, 2016, 01:47:22 PM
Afternoon All, new carb boots and repair kit for the infamous starter clutch ordered. Can't wait for them to arrive. ::)
In the meantime I got some work going on the seat brackets / mounts. They were all rusted so got them stripped to bare metal and covered with Zinc spray. Maybe tomorrow I will get my hands on some black paint and get them finished.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: royhall on January 21, 2016, 03:56:22 PM
Hi and welcome to the forum. Interesting little project you have going there, we don't get many of those on here. Don't want to rain on your parade, but be careful what you paint your parts with as some paints do not adhere very well to zinc based products such as cold galvanise spray. An etching primer is usually required first. Good luck with the project, if you need advice just ask. Cheers.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 21, 2016, 05:39:12 PM
Hi Royhall, etch primer - added to shoping list :) First that, then black finish. Thanks for the advice. All the major parts will be either painted o powder coated by profesionals. I'm just painting the tiny and not visible bits ;) Still, want to get them right so thanks again 👍
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 24, 2016, 03:52:58 PM
Hi all, so I went on today to get my starter clutch fixed. After getting it out it turned out that the kit that I bought does not fit, the rollers and all are way bigger than does in the starter clutch :(
So now I have to return it to the seller ( didn't even have to take it out of the package ) and buy another one.
Question here, will one from a CB750 fit or will it not ? I have looked a David Silver and he only sells separate springs and caps but no rollers. The kit in question is this here :
http://www.ebay.co.uk/itm/181938550098?_trksid=p2060353.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT (http://www.ebay.co.uk/itm/181938550098?_trksid=p2060353.m1438.l2648&ssPageName=STRK%3AMEBIDX%3AIT)
Please help  :-\
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Bryanj on January 24, 2016, 04:54:03 PM
You need to check part numbers not just guess mate
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: tom400f on January 24, 2016, 04:57:24 PM
That model list looks like all DOHC to me.

Try this:
http://www.motogrid.com/oempartfinder.htm#/s/HOM//28120-426-000/1

I *think* that might be your part number and that site tells you where else it is used. Regretably it seems the CB650 is the only bike...

Again, if I've got the right bike then the parts assembly is here:
http://www.motogrid.com/OEMpartfinder.htm?aribrand=HOM#/Honda/CB650A_%2879%29_MOTORCYCLE,_JPN,_VIN%23_RC03-2002472/PRIMARY_SHAFT/CB650-79-JPN-A/2Y14426ZAE14426Z15A

Hopefully you can do some digging by part number
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Bryanj on January 24, 2016, 05:37:57 PM
It is a single cam but I dont remember the nighthawk being a UK model, Still look at Motogrid but be sure which bike you have as they use different names/codes, anything up to 82 SHOULD be ok
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 24, 2016, 05:47:05 PM
Thanks for the replies, Tom I will have a look there in a second.
Bryan I have checked the parts numbers, I am trying to avoid getting them in US, UK or EU would be much faster. She is a US model, I think the same bike was offered here but under different name
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on January 24, 2016, 11:26:28 PM
New parts ordered from http://www.cmsnl.com/ (http://www.cmsnl.com/). 27 euro for springs,caps and rollers I think a very good price. 13 euro for postage for them little bits quite painful but at least it's coming from Netherlands and not the US so shouldn't be too long, I hope. On hold until then ;)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 01, 2016, 06:20:12 PM
Well, it has been a while... Loads of work at home ( painting & decorating ) and low on funds so work is progressing very slowly.
Starter clutch repair kit has arrived, and so did new carb boots. I had the clutch cover and the oil pan removed, took the starter clutch out and fixed it. There was a lot of little red silicon bits in the oil pan and effectively blocking the small mesh filter thing on the oil pump intake ( whatever the name for that is ) I guess whoever was doing some work on the engine before was using a lot of silicon wherever he could, instead of buying seals  :-\ Anyway, that's all cleaned, checked the oil filter, looks new ( the previous owner told me it was replaced, but judging on everything else that was done to the poor girl, wouldn't thrust him ).[attach=1]
I did fit the new carb boots, and having the carbs out again I have changed the pilot screws settings, as previously I had them at 1 and 1/8 turn out as per Haynes manual. Later I looked at the back pages where it gives specific settings for different years and UK and US models, just to find out the on my model it should be 2 and 1/4 turn out  :o So that's the way they are now.[attach=2]
I bought new 10w40 oil, some cheap brand as it is only there for the  trial and error work on the engine, and it will be most definitely drained again at some stage.
Took her out and started up, I think she isn't working to bad  ??? ( It obviously had to start raining )
Any how, here is a very short video of getting her started ( she was already worm at this stage )
https://youtu.be/rczqXbRWqog (https://youtu.be/rczqXbRWqog)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: MarkCR750 on April 01, 2016, 10:21:15 PM
Sounds as though it's going well, and there is no rush to restore a bike, working on them is almost as good as riding, keep up the good work.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 03, 2016, 12:16:38 PM
Thanks for the good word Mark, I do enjoy working on the bike big time, I only wish I had a wee secret room with all the parts that I need  :)
As to working on them being almost as good as riding them, well, ALMOST makes a lot of difference  ;)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 03, 2016, 08:28:04 PM
Just a quick question here gents, I need the indicator for the rear of the bike, possibly also one for the front, anyone here that maybe have some in the boxes of spares ?
They are Stanley 045-6779 indicators.
If You have them and wouldn't mind selling let me know please  :)
Thanks
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Chris400F on April 04, 2016, 03:24:53 PM
I have these if they are any use. Not perfect but certainly usable.
Only one lens I'm afraid, and no screws (they are a larger thread than those on the smaller lamps used on the 400/4 and others).
£10 posted. PM me if interested.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 04, 2016, 03:40:31 PM
Thanks Chris  :) PM sent  ;)
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Sgt.Pinback on April 04, 2016, 03:55:54 PM
Cool project.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 04, 2016, 04:13:45 PM
Thanks Sgt.Pinback 😊 Fortune to be spent - if You have it. It's moving slowly but will get there one day

Wysłane z mojego HTC One M8s przy użyciu Tapatalka

Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Chris400F on April 04, 2016, 08:04:03 PM
Thanks Chris  :) PM sent  ;)
Replied when PM received, did it get through? There seemed to have been a few problems with PMs last week.
Resent to be on the safe side.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on April 08, 2016, 08:58:05 PM
Indicators came in today Chris, great job they are. Thanks again

LwG

Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on May 26, 2016, 07:14:50 PM
Hi all, just another little update on what is going on in here - not much to be honest.
Indicator from Chris on the bike, replaced one that was squashed at the back.
I have changed exhaust studs around as some were damaged, I got a set of ebay that are m8 into m6. As some threads were damaged in the cylinders, I have re-threaded them into m8 and left the m6 on the outside. No pics of that operation but  :(
And just yesterday fitted new drive as the old one was well overdue. I went for a gold DID 530vx and JT sprockets.

Issues to be looked at now are : there is a rattle from inside the clutch cover, if You remove the oil stick You can here it very clearly - sounds like the was a loose nut flying around ?? ( there is not )
Next one but  think not as serious ( ? ) is back fire on cylinder 1 or 1 and 2. When test riding if You go into higher revs and then let go it would back fire  :(
Any ideas ??



Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: totty on May 26, 2016, 09:02:46 PM
"When test riding if You go into higher revs and then let go it would back fire"

Missing or blowing exhaust gasket can cause this.
Title: Re: 1982 Nighthawk Restoration ( attempt )
Post by: Krzychu on May 26, 2016, 09:22:58 PM
Hi Totty, if You mean the  " copper ring " exhaust gasket then they are all there and all new

LwG

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