[tonyevans]

New Questionis -

I have got the head off and the only mark I can find on the pistons (Dome top) is an arrow pointing to the carby side - I assume these are standard size pistons. Is this correct?


As the title says I would like to know which model engine this is – It has plastic oil lines???

[sideways]

Looks like a run of the mill LJ50 motor with the earlier (? I can never remember which is which. It's in the back of the manual of you've got one) bell housing pattern to me, I don't think I've seen one that didn't have plastic lines.

[tonyevans]

The one with the blown Big end out of the LJ50V has metal lines?

[sideways]

tonyevans wrote:

The one with the blown Big end out of the LJ50V has metal lines?

Is it a particularly early one? Now that I think about it, all the ones I've seen have been quite late models. I make point of checking the lines because you can see the oil in them and that's cool.... Haha

[tanshi]

looks like most of the LJ50 motors i have, all mine have plastic lines.

except two of my barrels whaich dont have the ports into the barrel for any oil lines at all.

[tonyevans]

Maybe someone re-piped it at sometime? I thought I read somewhere there were different motors with small differences - Getting old may explain it :<{

[tanshi]

there were two motors, the newer one was the same one that came in the sj30 in Japan.

they had no oil lines to the cylinders

[sideways]

Yeah, this is an SJ30 motor I found. As far as I can tell, it uses the same cylinder casting as an LJ50 but not drilled and tapped for oil.

[3cyl]

It's the second generation of LJ50- as in post 75, the earlier ones had a stud at the bottom of the bellhousing face giving 5 + the starter bolts to the gearbox as well as a different flywheel and clutch. Also the dizzy has the fixing slot cast in alloy, not the steel clamp, with an advance curve from 10 deg to 20 deg instead of 8 to 20 deg. All motors I've seen have plastic oil lines except the one to the barrells which becomes steel and branches into 3. Later ones like the sj30 ones have a flatter head with Suzuki cast into it in big letters and no oil lines to the barrells, so only 3 discharge ports on the oil pump, a "low smoke" motor, also a different exhaust manifold for the SJ. Carry ones have a side draught carb, a flatter dizzy with no advance and an exhaust manifold that goes straight back, not down

[tonyevans]

Thanks for all that - Learning curve in operation .................... again.

[tonyevans]

bump for new question

[3cyl]

Probably standard, standard = 61mm, o.s are 61.5 or 62mm

[tonyevans]

Thanks 3 cyl - I will have a measure to make sure