HondaCB650

Great progress. Now you have a nice, straight top rear frame. The shock mounts look great and I assume it was tough work to make them fit that way. Do the coils still fit at their original mounts with the lowered tank? The piston carbs will not fit this cylinder head if you have the full array of fo...

The center cover (and at Z-model and '79 also side covers) are a bit special. The center cover is fixed with two of what you called "weird looking ufo bolts" some time ago. :lol: If you turn them in, the metal step at their bottom fixes and limits their position in the thread. More torque ...

There is no need or reason to deviate from book specs unless you really know what you do. Special fuel or special cams might be a reason for things like that. If somebody should run into valve overheat problems with book specs, this is probably due to too lean. And this is most probably due to pod f...

You will need a cam for the circuit breaker, too. So the crankshaft needs a modification, too. I think the mount of the pulser magnet is screwed into the right side of the crankshaft so basically it should be removable. Some people here got it out but I think that was not that easy because the part ...

Tommysparta wrote:.. or can I run the bike without the vacuum valve as long as I remember to shut off the petcock.

Yes, most previous models are just like that.
You should plug the vacuum nipple for this valve at the carbs however.

GeorgeSweety wrote: If you no longer need the side panels and they are for sale I would be interested.

It took almost one month until my patience was rewarded.

Ah, THAT nozzle, the "oil control valve". Well I put a wire through it. I highly doubt there anything in there. At most I scuffed up the top of it. I imagine it functions to pass oil through the middle and seal the hole within which it fits and if that's it both nozzles should operate jus...

I don't know what the "nozzle" thread is. ... On the cylinder bottom level you squeezed one of the calibrated nozzles for head oil supply. You did not get it out easily so you cut a thread and pulled it out. For sure debris from that work fell down into the hole below. This "hole&quo...

From the different online manuals I've seen in here(internet, other forums) the only other method that worked for me was put in one sprocket bolt, then the chain as much as possible, then crank/force it over to get the holes aligned for the last sprocket bolt. That worked for me. The other way didn...

I did not say you can't do it. But you need a different approach. You have to be sure that there is nothing inside that can cause further damage before you start the engine. No need to preliminarily put it together and see if it runs. This is no prototype but a proven engine. You will gain nothing d...

The RC08/SC is probably the most far off starting point for a CB650 cafe like project due to the frame, instrument box, handlebar mounts, footpeg alumina and some other stuff. But by that: Oh yeah, that!...I'm not going with PODS, been there, struggled with that when the PO originally got the bike. ...

Another question that crosses my mind is whether there is value to having a rear inner fender to protect the back of the motor and the under seat area. If you are not going to keep the stock airbox (most cafe builds imply pod filters, so I simply assume yours, too) a fender is probably a quite good...

Sorry that I have to say this but your proceeding is inappropriate. You assume there are no filings in the channels from cutting the threads, you think the head bolt threads down there in the case are not stripped (they are easily stripped BTW) etc. This means you know nothing for sure and just hope...

I also thought of cutting a thread and pull it out but I did not want to propose that because of the filings. Because I am not sure if you get them out with the engine in the frame. These (calibrated) nozzles are really important for the oil supply of the head and camshaft bearings! If one of them t...

It looks not bad at the first pictures but at the last picture the width looks quite much.
Might be just a camera focal width/perspective issue however.