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| 2 Stroke experts – Which engine is this? New Question https://www.auszookers.com/forum/viewtopic.php?f=5&t=34788 |
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| Author: | tonyevans [ Tue Aug 07, 2012 3:39 pm ] |
| Post subject: | 2 Stroke experts – Which engine is this? New Question |
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???    
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| Author: | sideways [ Tue Aug 07, 2012 3:57 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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. 
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| Author: | tonyevans [ Tue Aug 07, 2012 4:11 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
The one with the blown Big end out of the LJ50V has metal lines? |
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| Author: | sideways [ Tue Aug 07, 2012 4:22 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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 |
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| Author: | tanshi [ Tue Aug 07, 2012 4:27 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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. |
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| Author: | tonyevans [ Tue Aug 07, 2012 4:30 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
Maybe someone re-piped it at sometime? I thought I read somewhere there were different motors with small differences - Getting old may explain it :<{ |
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| Author: | tanshi [ Tue Aug 07, 2012 4:40 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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 |
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| Author: | sideways [ Tue Aug 07, 2012 4:45 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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. 
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| Author: | 3cyl [ Tue Aug 07, 2012 5:43 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
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 |
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| Author: | tonyevans [ Wed Aug 08, 2012 8:17 am ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? |
Thanks for all that - Learning curve in operation .................... again. |
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| Author: | tonyevans [ Wed Aug 08, 2012 12:26 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? New Question |
bump for new question |
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| Author: | 3cyl [ Wed Aug 08, 2012 5:39 pm ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? New Question |
Probably standard, standard = 61mm, o.s are 61.5 or 62mm |
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| Author: | tonyevans [ Thu Aug 09, 2012 8:39 am ] |
| Post subject: | Re: 2 Stroke experts – Which engine is this? New Question |
Thanks 3 cyl - I will have a measure to make sure |
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