Should i pull the motor yet?

[big-b]

I'm rebuilding my 305 Superhawk, it might be a restoration but for now i'll call it a rebuild since i don't know how far i'll take it. Here's my situation. The motor is frozen, the bikes been sitting since 1981. I just started putting kroil in the cyclinder heads to try to free it up, i've heard that sometimes these types of penetrating fluids can take up to a month to work. While i'm waiting i have been stripping the body parts off and getting them ready for paint. If i pull the motor now i can start working on the frame. Should i wait to pull the motor until i get it freed up? Once the frame is painted i don't want to have to take the motor in and out if i have problems. When people have their motors rebuild is it common to just pull the motor and bring it somewhere to have the work done? It seems like the motor will go in and out of the Superhawk much easier then it did with my scrambler.

Thanks,

Brian

[G-Man]

That's a real find. The bike looks all complete. I just picked up a Super Hawk but it's nowhere near as nice as yours.

I tried unfreezing my scrambler motor while it was in the frame but eventually gave up and pulled it out. I had to use heat and block of wood to thump the piston out of the barrel. With the head off you can see what is going on and can squirt more kroil as necessary. Depending upon how lucky you are you may need to cut the cam chain as you won't be able to rotate the engine to find the link.

G

[davomoto]

Big B, yes it is much easier to remove, and install than a CL engine. The majority? of us on this site do our own engine work. If you're not comfortable attemting an engine rebuild, ask on this site for a local rebuilder that is familiar with these engines. I'd say plan on at least a top end rebuild.

davomoto

[teazer]

That's a very complete original late model CB77. Good find.

Davmoto is correct. Just drop teh motor out and pull the side covers and top cover. carefully split the cam chain and use pull the head off (don't forget the two nuts hiding under the spark plugs).

Then apply the usual heat/penetrating oil/judicious force technique to move the pistons down.

These motors are pretty basic and very easy to work on. Assembly is normal but the crank and trans go into the top half of the crankcase first, so if you make an engine stand, allow for that.

Budget for at least a full gasket set and oil seals and be prepared for a valve job and probably new pistons and a rebore (you'll know that when it comes apart). If you get lucky, most of the parts inside will be usable for a sunny Sunday rider.

Several people here can rebuild a motor, but I suspect that most of us do it ourselves. Some of us have been messing with these fool things since they were new. (sad but true).