[Bobby05]

So I decided to put some new gaskets on my 1977 Suzuki gs750 and since it needed them but now the engine won’t crank or turn over, you can turn the crank back and hit the the starter and it’ll spin just a tiny amount and then just stops, I tried kickstarting it and it won’t even move, I even tried turning it over by the bolt for timing stuff but that didn’t do anything either. I’m not sure if I put some back wrong or what happened

 

[TrialsRider]

Did you take pictures of everything when you were taking it apart, that's usually a good idea if you're not sure. What gaskets did you replace, did you do anything that would alter the valve timing? Don't turn the engine over if there is any chance the valves are colliding with the pistons or damage will result.

 

[CaTacL1sm]

when you say new gaskets, what are gaskets we talking about?

 

[Bobby05]

Did you take pictures of everything when you were taking it apart, that's usually a good idea if you're not sure. What gaskets did you replace, did you do anything that would alter the valve timing? Don't turn the engine over if there is any chance the valves are colliding with the pistons or damage will result.

I replaced the metal head gasket so I had to take the heads off for that and the valve cover gasket since I had that one too. I did put the cams 20 pins on the Chan apart like it says but is it possible I have the cams ever so slight advanced enough

 

[CaTacL1sm]

Did you rotate it by hand a few times with the valve cover off to make sure everything was lined up right and there was no interference (before closing it up and attempting to start it with the starter)?

 

[Bobby05]

Did you rotate it by hand a few times with the valve cover off to make sure everything was lined up right and there was no interference (before closing it up and attempting to start it with the starter)?

Idk why didn’t but I wish I did but it wouldn’t take me long to pull it apart to check it

 

[AlanSmith7]

We can’t help you without the picture. But still, make sure the replacement is pretty good. Make sure don’t turn on the engine, because it may cause more damage.

 

[8ball]

The more important question is whether you had the crank shaft at top dead center when you set the cams. This motor is not a real close interference motor, it would take quite a bit of cam to crank mis-timing to create the hard stops you are describing…. Not a slight advancement of the cams.