Re: I just wanted a new transmission...

Posted by blk72750 on Dec 03, 2012; 11:38pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/I-just-wanted-a-new-transmission-tp4032820p4033057.html

Yeah was thinking about going up to the 849cc. On the engine I was thinking of using the new bottom and top casing, and the internals from the old one. getting the cylinders bored out, some work on the top end, new tranny and pistons. Did I miss anything I should update while I'm already in there? Here's some picks of what I got off today.

On Dec 2, 2012, at 11:08 AM, "pwbcktftii [via Honda CB750'S]" <[hidden email]> wrote:

I am assuming you are refering to the cylinder studs. You didn't say how you got the 4 out. So, here goes. First try to unscrew the by the 2 nut method. Take 2 of the head nuts & make sure there clean. put a 12mm 6 point box end wrench on the stud (need for later).  Install the first nut on a stud upside down. then install a second nut on regularly. Now take a second 12mm 6 pt. wrench & tighten the 2 nuts against each other as tight as you can. Now with the wrench that has the stud through it, try to unscrew the stud. Studs will flex some as you break them free. If it fells like there going to snap off, STOP. I realize this is a judgement call, but don't break the stud. Instead apply some heat to the aluminium around the stud bottom. A propane torch usually works. If not go to mapp gas or acetylene torch. Due to the hour glass shape of the cylinder studs I have not found a stud remover that will work here. Also I can't recommend vise grips, they will work but, you get deep bite marks in the stud. Then the stud will strech when torqued. Now that I said all this, I am assuming "again" that you have stock studs. I mention because, if you have any thoughts of going to an 836cc kit (or bigger). Then, now would be a great time to upgrade to the heavy duty studs that are 8mm thick top to bottom. Lastly use the 2 nut method to re-install the studs.

About a previous post - The engine cases are bolted together and machined as a set. I would take care when mixing tops & bottoms & years. Check crankcase breather spigot (2 sizes out there). There are differences in the counter shaft sprocket area (530 - 630 chain, rubber chain guide on older engines, different counter shaft covers). Also different clutch cover in '69', '70', '77' & '78' from middle years.

To all others I will take some pics & post when I can. My favorite chopper is apart right now for a new paint job. I am having the frame powder coated. FYI it's Jammer (Amen style frame) '78' SS engine, 836cc, Long twisted springer front end, king & queen seat, forward controls, tall sissy bar, Invader mag wheels & lots of chrome!

---

If you reply to this email, your message will be added to the discussion below:

http://honda-cb750-s.456789.n3.nabble.com/I-just-wanted-a-new-transmission-tp4032820p4033010.html

To unsubscribe from I just wanted a new transmission..., click here.
NAML