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Messages - SeanFD
1
« on: October 22, 2024, 09:50:54 PM »
I'll be doing that particular task, which I hate, tomorrow, using my new tool, once I go and get a 9mm ring spanner that is!
2
« on: October 22, 2024, 08:41:28 PM »
Clever that; wish I had seen that earlier.
But it's on now, for better or for worse. Will see tomorrow, when try to start it.
3
« on: October 22, 2024, 05:22:01 PM »
A little difficult to describe remotely, but the snag comes usually from the tappet screw face that touches the valve tip "catching" on that tip as it comes down into alignment with the case/cover closing.
Diligence in looking at all of the valves at that location to see that it's not happening should let you gently close the cover by going around equally with the bolts to evenly bring the two surface together. If that makes sense 
I understand. I retracted the screws until all were inside the rocker. It’s all done now.
4
« on: October 22, 2024, 05:20:31 PM »
I've become a little confused as this thread started for a 400F now it's presumably talking about your 750 K2 oil leak.
I know nothing about the 750s.
Sorry Ted. 750 stuff was just intro. I’m onto my 400F2 now.
5
« on: October 21, 2024, 11:57:55 PM »
Thanks,
I spent an age trying t0 see if something had snagged, and then some more to make sure it wasn't the tacho drive not meshing properly. Then I tried with all the lobes pointing not-up, as far as was possible and this improved things a bit.
With the bolts in place, it is looking better and so tomorrow the plan is to tighten it all down.
I'd like to get it running before I head back to France on Thursday, so fingers crossed.
6
« on: October 21, 2024, 06:34:03 PM »
I went ahead without the washer/spacer and put the rocker cover on.
Even with a;; the tappet adjustment screws fully out the cover didn't sit flat on the cylinder head, and when I rotated the engine, it moved, rocking :)up and down a bit on a L/R axis.
Hand tightening the bolts, just until they touched stopped this rocking, but I was hoping for some reassurance, before tightening everything, that this was normal.
7
« on: October 20, 2024, 02:12:45 PM »
Hi everyone, I'm back from Belfast, N America, having covered some 14,500 miles on my 750 K2. There were a few hiccoughs along the way but the old girl made it. She has a, now, serious oil leak from, I think, the cylinder head gasket joint That I will have to sort out before continuing in NZ, but that's a story for another day. So I'm back to Rusty and her top-end. I've installed the new camshaft and sprocket. Because the washer thing I mentioned earlier was warped a bit, and Because N Julie said it was absent on all but the latest F2s, I decided to leave it out. Sprocket was successfully attached, but I noticed there was a bit of lateral movement after torquing the bolts - about 1-2mm. I don't think this is because I omitted the washer, but what do y'all (American influence  ) think?
8
« on: September 21, 2024, 05:05:10 AM »
The white wire conveys the voltage status of the battery to the field coil. Under normal circumstances it goes through the regulator to do this. I think you need to bypass the regulator and see if the battery gets charge; if it does the regulator is faulty. I think, with your combined RR you have to leave it connected and then run a jumper from the white terminal to the battery +ve terminal. Run the engine to 2000rpm max. If the battery is charging, the regulator is faulty. The other thing you could do is buy a copy of the book that BigAl copied the simplified wiring diagram from. You can find it here: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book
9
« on: July 14, 2024, 08:12:25 AM »
10
« on: July 12, 2024, 07:02:11 PM »
While trying to retrieve that bit of camshaft I have posted elsewhere about, I removed the sump and, naturally, before doing so, drained the oil.
It has been in there for about 18 months, just sitting and doing nothing. The engine has been kicked over now and again and run for about 3 minutes.
I was amazed at how dirty it looked! The inside of the sump was coated with what looked like dust mixed with the oil.
So I go with Brian; I would change it at least every year or so, or before you start to use it again after a break.
11
« on: July 12, 2024, 06:55:57 PM »
He actually had 4 of these on his website - 400fourbits.co.uk. The one I was going to get (at £60) turned out to have a chunk missing, rather like mine. I have found another which looks better. Just waiting on response to my offer.
12
« on: July 12, 2024, 04:14:05 PM »
That’s be grand, sure!  I’ actually off to the States next week so I’m going to see what I can find there.
13
« on: July 12, 2024, 12:03:18 PM »
I did think about the possibility of the sprocket not being properly on as suggested by Bryan, and that may have been the case given the relative tightness as I put the bolts in - not overly tight, just not turntable by hand. The first one was in snugly and I then put in the second and was torquing it when it stripped. Maybe an off-centre sprocket meant the bolt wasn’t lined up correctly so was cross-threaded. The shaft broke after I had removed the sprocket bolts. Good news is that I retrieved the missing part, sitting on top of the primary chains. But not till I had already removed the sump …. And the exhaust to get at the bolts!  The camshaft I had ordered turned out to be damaged, so now on the lookout for another.
14
« on: July 10, 2024, 09:09:26 PM »
Use Allen screws. Much easier to get out - and more importantly back in as they sit on the hex key.
15
« on: July 10, 2024, 09:07:48 PM »
Or new title: Everything happens to me!On my enforced sabbatical from my USA trip, belfast2belfastbybike.com for those who don’t know, I decided to get this bike up and going. I took the rocker cover off and almost the first thing I saw was the dowel I thought was the culprit; intact and lying against the oil pipe. Obviously it had just dropped out of the rocker cover when I removed it. [ Guests cannot view attachments ] Replacing the bolts into the cam sprocket was difficult - they felt tight. I got one in and torqued and was doing the second when it stripped! (Original Honda bolt) I was thinking to take the camshaft out to inspect the threads more closely when I noticed what looked like a crack in the lobe where the bolt goes. I touched it with a screwdriver and the result was not pleasing! [ Guests cannot view attachments ] While trying to gat a hold of this piece and not being careful enough, (how could such a chunk of metal fall down that small hole?) I dislodged it and down it went. I think – I hope – that I can retrieve this by dropping the oil pan, because my efforts to find it from the top were unsuccessful. So that put paid to my hopes of getting the bike running quickly. A replacement camshaft is on its way from Steve Cooper at 400FourBits, along with some new bolts and a gasket from DSS. Anyone seen this happen before? No I didn’t drop it, but someone else may have I suppose. I guess I should be happy that I found it now and not when to cracked at 6000 rpm, but sometimes it’s hard to be philosophical 😢 [ Guests cannot view attachments ]
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