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Post by niz76 on Feb 6, 2016 23:11:32 GMT -5
Ok, started tearing the ol' wasp down... This thing is kinda tough to work on. Reminds me of working on a car! Certainly not the eazy cheezy 10 minute job of pulling the engine like it is on my Roketa AIR scoot that's for sure! Carb out...  Unhook electronics- I took a lot of pics here to make sure I get it back together right!   Uh Oh... This doesn't look good! Maybe that's why the ignition switch nor kill switch will shut the engine down?? I have to choke it to kill it haha.  A lot of misc. disconnections later and we have extraction!  |
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Post by niz76 on Feb 6, 2016 23:16:21 GMT -5
Now that I've got the engine out and my work space all cleaned up I really see the need for an engine stand. Now I know why I've seen so many of them for sale- this engine is awkward and side heavy. There's no way to really get it sit at any good angle so I took matters into my own hands and built this little baby- an engine stand!  It was a real quick down-n-dirty job. I didn't even measure anything- just eyeballed and started cuttin' and grindin' and weldin' and voila! Aside from my atrocious welding skills I'm real happy with how it turned out. maybe someday I'll even paint it!  Oh yeah- time to really dig in now!  |
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Post by stepthrutuner on Feb 6, 2016 23:20:04 GMT -5
Oh, show me more... MORE...  |
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Post by aeroxbud on Feb 7, 2016 11:35:22 GMT -5
great work on the stand. That will make it better to work on.  |
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Post by 'O'Verse on Feb 7, 2016 11:58:32 GMT -5
Nice!  |
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Post by oldgeek on Feb 7, 2016 14:44:05 GMT -5
Got this little gem in the mail today from Puerto Rico- a PX e-start flywheel! Yep- it came wrapped in a dog food bag haha.  Of course, my scoot doesn't have electstart but I've read that you can remove the steel gear ring from it and it will be considerably lighter than stock. A cheap and easy lightened flywheel mod! I won it for $5 on feebay plus $13 shipping...  Look at the high quality of parts from the older stuff! All those balance drill holes in that thing! Hope removing the ring gear does not destroy its balance? |
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Post by niz76 on Feb 7, 2016 14:51:05 GMT -5
Got this little gem in the mail today from Puerto Rico- a PX e-start flywheel! Yep- it came wrapped in a dog food bag haha. Of course, my scoot doesn't have electstart but I've read that you can remove the steel gear ring from it and it will be considerably lighter than stock. A cheap and easy lightened flywheel mod! I won it for $5 on feebay plus $13 shipping... Look at the high quality of parts from the older stuff! All those balance drill holes in that thing! Hope removing the ring gear does not destroy its balance? Ya I hope not. I already got it off and it actually came off quite easily! Just tapped it right off with a hammer and screwdriver. I figure I'll get the scoot tuned with the stock flywheel and after that put this one on so I can see what difference it makes!  |
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Post by oldgeek on Feb 7, 2016 14:58:14 GMT -5
LoL! probably good you took it off then. It may have come off by itself at a bad time after you are finished with that beast!
Watching this thread with interest, I have a 1977 Spirit 150 that needs your help!
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Post by niz76 on Feb 7, 2016 18:16:31 GMT -5
Oh, show me more... MORE... Oh there will be more Reggie- MUCH MORE!! Muwahahahaha.... |
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Post by niz76 on Feb 7, 2016 18:24:24 GMT -5
So I really really like these guys' video's. I've seen these fellas before on some youtube vids but lately I've been watching a few of their rebuild vids and they're really helpful! Tons of good info along the way. Seems these fella's have done all this many many times. They give a lot of little tips along the way too. I have already concluded that my shifter/selector box is in good shape using the info and tid bits they give. Also know how to check my magnets on flywheel (using a little trick with a 19mm wrench) which are good. What 90GTVert vids have done for us with 49cc scoots- these vids have done for me on this Vespa! Just Awesome info! At about 10 mins. into this vid they show the case port matching I'll need to do for my Polini kit (They're matching a Malossi's ports, but mine will be virtually the same). |
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Post by niz76 on Feb 7, 2016 18:53:34 GMT -5
Here's where I am at the moment:  I realized I didn't include a flywheel removal tool in my S.I.P. order- doh! Actually- I'm kinda glad I didn't. That order delivery is still probably 5-6 days out and luckily good ol' PFS stocks it! That means it should be here around Tuesday so I can to the good stuff- case splittin'! The last time I drove this scoot I rode it hard and put it away wet as they say- err not exactly sure why they say that- something to do with horses I think... So yeah- when I originally pulled the head off due to only 105psi compression I could see that the piston was damaged and actually slightly caved in(!). I basically looked as if it's been melted before and the last ride I did was quite long and she did well for over an hour but I did have to push it the last part of the way home through my neighborhood due to this:  Yep that piston is done!! IDK exactly what caused it- maybe lean tune or timing off or whatever but I'm not too concerned with it as I'll be installing a different intake and a carb I actually feel comfortable tuning- a Polini 28mm PWK. Of course it's also getting a Polini 208 cylinder and a "flowed" crank... With this rotary induction the durations are actually handled by the crank- and the ports in the cylinder too- idk it's still a little confusing to me how they work together, but basically the new parts will have certain specs where the timing should be etc. so there's not really any pressure for me to figure out what caused this piston to melt and fail like this- I'll have a completely different setup anyway! The cylinder is still in quite reusable shape!  Here's another shot of it with the others...   |
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Post by 90GTVert on Feb 7, 2016 22:58:26 GMT -5
Interesting stuff to follow Niz. The vids that have been posted of high end Vespas do a nice job of making me drool  , but that last pic really makes me want one. Here's another shot of it with the others... |
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Post by stepthrutuner on Feb 7, 2016 23:14:59 GMT -5
It's a good thing two strokes don't have all those in-head contrivances and come apart so easily since a bit of an unbeknownst air leak can do what happened to your poor piston. Head and especially exhaust temp gauges can alert you to overheat conditions before catastrophy. Either way you pay, pay. Playing metallurgy aganist thermodynamics may be the second oldest profession.  |
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Post by niz76 on Feb 7, 2016 23:41:39 GMT -5
She'll have a CHT gauge on her the next time she rumbles as at least minimum protection!
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Post by niz76 on Feb 7, 2016 23:50:04 GMT -5
Well I didn't get very far on the clutch side either before hitting a dead-end. I need the castle nut tool to get this clutch basket off the crank!  I double checked my order to make sure I ordered one. Yep I did! Tracking says parts may be be here on the 10th?! That would be great! This is the little bugger I need:  I must say I'm pleasantly surprised to be greeted by such a pristine looking clutch. She looks practically brand new!  So this seems to be as far as I go wit the engine for now until I get some tools in the mailbox! |
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, but that last pic really makes me want one. 