Frozen engine?

[Mekanix]

Does the crank rock just a bit? like maybe 1/16 of an inch? or is is solid? Where are the piston's located at the moment? If they are 1 up and 1 down or close to center then you can usually rock the crank a bit back and forth and in that case the piston's are stuck and that would be an idea what would be stopping it.

I have seen camshafts starved of good oil do this. When they heat up from no lubrication ( gas mixed in oil ) the cam's seize to the caps and head.

Into the cam cover is your next stop.

Another thing you can try that would say if its top or bottom end would be to rotate the knob on the timing chain tensioner and turn the crankshaft backwards.

If it moves at all that's just because the crank is taking up the slack in the timing chain and the top end is the problem. If nothing happens, Take a look anyways but its more likely bottom end.


Pic's help Video is better

[Jan]

From your information it sounds as it is the engine part (crankshaft, connecting rods, cam chain or cham shaft) that have the problem.

To make it compleately clear if you have a problem with your transmission, you could strip your clutch lever to the handle, to permanently disengage the clutch, then try to make the gear check, can you now turn the rear wheel in all gears? If you can, and I guess that it is a yes, then your gearbox will hopefully be OK.
The other information you gave - the oil was smelling of gasoline - that is no good, if the engine have been running on this lubrication. (This thin mixture is not capable to lift the journals clear of the bearing shells). If you still have the oil/gas mixture stored somewhere, you should try to mesh it in a fine mesh or maybee a coffie filter, just to check if there is metal partickles in it - this can indicate brakedown of bearings.

The most important reason for this gasoline ended up in your crank case, is because the fuel overflow hose placed on the T-pipe between the carbs is pointion upwards(or slightly up) and the drain hose is making a nice up-bend before it ends up right in front of your rear wheel. The T-piece must point straight down! Othervise a leaking petcock or a petcock placed in "prime" position will lead gasoline into the air intake valve, and it will slowly flow down into the gearbox until the gear box is full.

As Mekanix suggest start to disassemble the engine from top to see where the problem is. You can also check if you can turn the crank with the clutch disengaged, if not you have to take the engine apart.


Best regards
Jan