Honda-SOHC

Problem solved I think. I have been using a bottom end engine pre 1977 as seen in earlier pic. Thankfully the engine that will eventually go in is 1978 pics attached. As you can see there is room to accomadate a 10mm offset socket. Talking to the supplier they have supplied 15mm before. They make any sprocket to order. So I will be ordering a 10mm x 520 offset. Thanks guys.....Frank

I've just noticed that the bottom end I have in the frame is slightly different to my completed engine in that like your pic trigger the casing oppersite the drive shaft is rounded off with the bolt further back which might help. Now I'm totally confused

I totally get that trigger and I understand the conseqences. But it's the actual fitting of the offset sprocket that concerns me. Will it fit without having to split the gearbox, that's my concern.....Frank

That Vincent idea looks very interesting K2 as the cb frame lends itself to that I believe. I'll investigate further... Thank you.....Frank

Thanks Trigger what a relief

My K1 frame is currently powder coated but I'm not overly happy with the quality.  I inherited it when I bought the basket case itself but they didn't cover off threads and things like that and the general appearance of it is a bit naff.

Now I've got a load of frame mods to do for my CR build so it's going to have to be stripped at some point and I wanted to get an idea on what the best options are.  I've heard using strippers, is  the best way to go (pardon the expression , ones specifically that have methanol or something in them, although this could be complete BS.  I did use paint stripper when I was attacking the K3 yoke I have here but that took forever to get the powder coat off.  Obviously sandblasting is probably the way to go but just interested if anyone had any pearls of wisdom.

I also wanted to ask about the inside of the frame itself as I noticed when I moved it there sounded like bits moving around in there. I know they are getting on a bit but is there any way of making sure that the metal is treated inside against corrosion prior to getting the exterior powder coated?

Sand blasting is the way to go. I sand blasted my Yam xs750 it had been outside for 10yrs. You get a great finish, perfect for priming. After priming I used 2 pack paint and sprayed it several times. You get a far better finish with 2 pack. It's harder and wets out to give you a top class finish. I can see why powder coating is preferred in manufacture because it gets everywhere easier than spraying without waste. But it will never be as hard or wet out as 2 pack. (thats why it's not on cars)

Just what have I got! Please bare with me. Some of you may remember some weeks ago on my introduction, I asked you guys to identify what model of cb750 I had. We more or less agreed that it was an F2. On further investigating the engine, number it had to be a K6 engine in an F2 frame. On confirming the engine had to be a K6 why was it painted black? Obviously someone was trying to keep the F2 look. Knowing that the bike was going to be completley re-modelled I decided to remove the black paint. When blasting the bottom end of the engine the painting was very poor and came off quite easy. However when I moved up to the barrels and top end the paint looked like a factory finish even the bottom of the fins had paint in them. I carried on until engine was finished and thats were the questions started. Can an F2 top end sit on a K6 bottom end? What can be interchanged on the engine? The reason been is that the barrels are badly damaged on the face (pic) The rocker carriages mountings on the head have all been helicoiled all but one (pic) Is the head off a K6 or F2 (pic) So it would be good to know what will fit to what when looking for replacement parts. Hope you clever lot can help....Frank