TolChock
New Member
Hi all,
Fairly new to DTT...But digging the amount if information and tips. I haven't yet found any threads that discuss Honda 4's or more specifically CB650's. Okay, so they are the bastard child of the CB's, but they can be found cheap and can easily be made into very cool custom bikes.
Anyway, I'm looking to maybe start a string for CB650 owners/builders, people with experience working on these...How about I start?
I purchased a 1982 CB650SC nighthawk last summer (my first bike and first build). I rode it for a day and then straight away tore into it. The first things to go were all the plastic, then the air boxes (more on that in a bit), handle bars chain guard, etc. you get the idea. I started ordering all the kit that I thought would make the bike perform better and that I thought looked cool. Enter air box...I tore the air box off (it was cracked and had been repaired) and threw on the pods. Yea it looked cool, but I fought with it for a week trying to just get it to idle again. This was my first experience learning that what i think are minor cosmetic/performance mods can turn out to be quite a bit more complicated (note to self: carefully think through every mod and try to understand every effect that it might have.)
I did a bench syc and am using factory jet sizes, with air/fuel mixture screws turned 1/2 turn past recommended (pods). I rode it this way for about eight weeks, tolerating a lag upon acceleration and laziness throughout the gear range. I also put up with oil leaks and "band-aided" them as best I could, it seemed to only leak badly when I was pushing it (75-80 mph seems like it should be more?). I couldn't afford a tach so i did and getto style elimination.
Rebuild Redux:
I now have the motor out, the head cover and head off and will begin inspecting. Looking into the cylinders and on to the pistons #1 shows more carbon deposits than #'s2 & 3, #4 is completely clean, the way I had installed it. The combustion chambers look similar except #4 and its spark plug are oil fouled.
Here is where I need some tips/help/suggestions, Where do I begin trouble shooting and repairing? Valves, Rings, bearings...? I will post my progress as I go.
Cheers!
Follow link for pics...
http://s1172.photobucket.com/albums/r570/tolchock5/1982%20CB650SC%20custom%20build/?start=all
Fairly new to DTT...But digging the amount if information and tips. I haven't yet found any threads that discuss Honda 4's or more specifically CB650's. Okay, so they are the bastard child of the CB's, but they can be found cheap and can easily be made into very cool custom bikes.
Anyway, I'm looking to maybe start a string for CB650 owners/builders, people with experience working on these...How about I start?
I purchased a 1982 CB650SC nighthawk last summer (my first bike and first build). I rode it for a day and then straight away tore into it. The first things to go were all the plastic, then the air boxes (more on that in a bit), handle bars chain guard, etc. you get the idea. I started ordering all the kit that I thought would make the bike perform better and that I thought looked cool. Enter air box...I tore the air box off (it was cracked and had been repaired) and threw on the pods. Yea it looked cool, but I fought with it for a week trying to just get it to idle again. This was my first experience learning that what i think are minor cosmetic/performance mods can turn out to be quite a bit more complicated (note to self: carefully think through every mod and try to understand every effect that it might have.)
I did a bench syc and am using factory jet sizes, with air/fuel mixture screws turned 1/2 turn past recommended (pods). I rode it this way for about eight weeks, tolerating a lag upon acceleration and laziness throughout the gear range. I also put up with oil leaks and "band-aided" them as best I could, it seemed to only leak badly when I was pushing it (75-80 mph seems like it should be more?). I couldn't afford a tach so i did and getto style elimination.
Rebuild Redux:
I now have the motor out, the head cover and head off and will begin inspecting. Looking into the cylinders and on to the pistons #1 shows more carbon deposits than #'s2 & 3, #4 is completely clean, the way I had installed it. The combustion chambers look similar except #4 and its spark plug are oil fouled.
Here is where I need some tips/help/suggestions, Where do I begin trouble shooting and repairing? Valves, Rings, bearings...? I will post my progress as I go.
Cheers!
Follow link for pics...
http://s1172.photobucket.com/albums/r570/tolchock5/1982%20CB650SC%20custom%20build/?start=all
