12 augustus 2019 om 21:25 #789268
Mine Athena crank is still in the box on the shelf. And it will stay there a bit longer.
Indeed this looks of, but not uncommon in the world of Piaggio/Vespa. It is known Polini cases and Malossi as well have problems with a flywheel which in combination of an aftermarket crank will scratching the cases. Try the new Pinasco flywheel and it’s even worse. Another option is mill something from your flywheel so it runs freely.
I thought you said building was the most fun? 😎13 augustus 2019 om 19:02 #789284
Maybe it’s best for it to stay in the box and look good. 🙂
Building is one thing and paying top dollar and having to “fix” it is another. 🙂
Sometimes I just want to invest my self out of a problem, instead of building it from scratch. But I expect the parts to be within decent tolerances. 1mm off compared to original crank isn’t acceptable in my opinion, and I don’t want to modify other good parts just to fit a faulty part.
Damn, i feel anxiety when something comes out 0,05 mm off spec, I wonder how theese guys even can sleep at night when having 1 mm as tolerance during quality check. 😀
I’ve tried both the OEM flywheel and Pinasco, they both get stuck. I have opened a ticket from the shop I bought it, see if they’ll accept the return.21 augustus 2019 om 09:17 #789561
Have you tried the original flywheel, to check if you have less vibrations?
The Vespa engine uses the flywheel as a part of its final balance factor, because the crankshaft has the rotary inlet cutout where the counterweight has to be.
To my understanding, the pinasco flywheel is neutrally balanced, the original ones aren’t.
And btw, i only buy Mazzucchelli crankshafts, never had any problems with them. The standard one (AMT002) will give you about 172° of inlet timing in a Speedengine. Runs fine like that, or expand it a little to ~185° or whatever you like.24 november 2019 om 07:43 #791826
It’s been a while since last.. Worked with the engine yesterday and made a Pull-start bracket.
The bracket that came with the PVR pullstart isn’t compatible with my CNC case.
Further I shaped the transfers, not completly satisfied with the design but I think it will be good enough.
Still some work left I need to do with the dremel and polish it up a little bit and so.24 november 2019 om 11:49 #791830
Nice progress, its really getting there24 november 2019 om 12:44 #791832
Good to see an update again. Nice 😍24 november 2019 om 17:31 #791840
Nice man , so VCM 2020 its will be on display5 juli 2020 om 12:50 #799940
11 juli 2020 om 13:15 #800154
- Deze reactie is gewijzigd 1 month geleden door sx3-swe.
And ? is the crankshaft turning smooth ?, how is bottum and top dead center ?, is the squeeze oké !!
You can always work with different thickness gaskets for the right timing
Great Pictures, nice work, beautifull engine 😛13 juli 2020 om 16:10 #800185
Oh my god, this engine.14 juli 2020 om 17:25 #800202
Very very Nice! , love to see this one flying and also a HK 2fast on top of it all ! You have any idea what kind of transmission you’re going to use with this kind of power ?
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