modpx
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Posts: 87
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Post by modpx on Jan 10, 2013 1:52:25 GMT
Alrite, after many researches i came to the final conclusion that the my head is for longstroke 60. In the first the cylinder head of an italian guy from an italian Vespa forum who has the same cylinder head as mine, the model is vrh c60 (c60 stands for corsa60=longstroke60) and the code is 810. The second picture is the "vrh pro candela centrale" (central spark plug) version , it's still for longstroke and is code is A3610. The third pic instead is a 215 cylinder head. The code 810 is the same as the longstroke. If anyone from this forum has a pinasco 225 with a different head and can prove it i'll be glad to change my mind Alternatively can contact Andrea Pinasco in person! ;D ;D That said I'll lap tand seal he cylinder as i was told before, i'll tighten the head harder than before and upgrade the mainjet. I'll check the spark plug colour and avoid squeezing the gas too much till the end of the running in. I'll keep you posted. Attachments:
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Post by pxguru on Jan 10, 2013 6:20:10 GMT
When I looked I found 4 different types of Pinasco head and some centre plug varients for the 213 and 225 also. I have never been a fan of Pinasco as they are just dont make a fast scooter.
You do really need to check the squish and come up with a measurement to settle this. If you can prove the gap between the piston edge and the head is ok. Then this wasnt why it siezed.
When you get your new piston?
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modpx
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Posts: 87
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Post by modpx on Jan 10, 2013 9:49:04 GMT
When I looked I found 4 different types of Pinasco head and some centre plug varients for the 213 and 225 also. I have never been a fan of Pinasco as they are just dont make a fast scooter. You do really need to check the squish and come up with a measurement to settle this. If you can prove the gap between the piston edge and the head is ok. Then this wasnt why it siezed. When you get your new piston? Are you for Polini or Malossi guru? The new Piston is on the way... should be coming by the end of this week (hopefully) but today i got the new upper ring (i accidentaly broke it while i pulled it out to clean the piston ) so in the meantime i can try to mount the old one and see if it's dead or it goes ...
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Post by sbwnik on Jan 10, 2013 10:12:25 GMT
WD40 shouldn't do anything other than clean the surfaces, the base should have a gasket anyway, and a gaskets job is to seal.
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Post by pxguru on Jan 10, 2013 11:25:41 GMT
WD40 shouldn't do anything other than clean the surfaces, the base should have a gasket anyway, and a gaskets job is to seal. Wet and dry paper, WD40 and a sheet of glass make for a nice shiny gasket surface!
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Post by pxguru on Jan 10, 2013 11:39:15 GMT
Are you for Polini or Malossi guru? The new Piston is on the way... should be coming by the end of this week (hopefully) but today i got the new upper ring (i accidentaly broke it while i pulled it out to clean the piston ) so in the meantime i can try to mount the old one and see if it's dead or it goes ... If you just match ports and bolt on kits then Malossi is the fastest and really solid and reliable if jetted and timed well, although always a little dissapointing with their torque. The Polini 207 is by far the fastest of all the kits. Just bolt on they go well but after a few days grinding out the Polini ports to match a Malossi piston, then you have a TS1 beating Vespa! ;D All my clutch parts and Speedo arrived from SIP yesterday. Sometime next week I'll try a new video to show you what I mean!
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Post by kru251 on Jan 12, 2013 11:40:55 GMT
Is there something re. tuning Vespas about getting earlier crankcases 'cos the later one are weaker? I remember either hearing/reading about strengthening webs being removed/reduced and that enabled highly tuned Vespa to damage their 'cases. Fact? Urban myth?
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modpx
1st Class Ticket
Posts: 87
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Post by modpx on Jan 12, 2013 17:38:39 GMT
Is there something re. tuning Vespas about getting earlier crankcases 'cos the later one are weaker? I remember either hearing/reading about strengthening webs being removed/reduced and that enabled highly tuned Vespa to damage their 'cases. Fact? Urban myth? For what i know that is valid only for the very early P125X non electric models 77-81. On those they say you can "dig" more without making holes in them. The 150 cases are already considered weaker than those. So we're talking bout very few of them.. but i have never experienced it myself, only case i´ve drilled are mines (PX disc). i think it's bit of an exaggeration though.
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Post by kru251 on Jan 12, 2013 18:26:51 GMT
Well, that's good then. Trouble with 'urban myths is they perpetuate and become 'fact'! Cheers for clearing that up. I keep toying with the idea of tuning the PX200EFL I have, but with a tuned Lammie to contend with etc I have to look at the reason I bought the PX in the first place; reliability!!! Might whip the engine out & check the piston/barrel for potential new piston & rings refresh though and while it's apart...................NO, No, Nooooooooooooooooooooo LOL
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modpx
1st Class Ticket
Posts: 87
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Post by modpx on Jan 12, 2013 19:58:32 GMT
Well, that's good then. Trouble with 'urban myths is they perpetuate and become 'fact'! Cheers for clearing that up. I keep toying with the idea of tuning the PX200EFL I have, but with a tuned Lammie to contend with etc I have to look at the reason I bought the PX in the first place; reliability!!! Might whip the engine out & check the piston/barrel for potential new piston & rings refresh though and while it's apart...................NO, No, Nooooooooooooooooooooo LOL ahahahah stay away from it! Keep those panels close! Or the tuning virus might spread and infect your Vespa! ;D
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modpx
1st Class Ticket
Posts: 87
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Post by modpx on Jan 12, 2013 22:35:10 GMT
@guru...we have to talk about the compression ratio! I´m studying...
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Post by sbwnik on Jan 13, 2013 9:59:58 GMT
Now we're back on to a subject I know about.
All model variants essentially use the same casings, but there is a lot of variation across the cases, both in quality and finish. Hence you'll find engines you can dig deep in, and ones you can't, from the same model and the same year. My personal suspicion is that this ties in with the 'only ever use matching engine half letters' rule, but its no more than that - a suspicion, and I've no idea which letters are better than others (if correct). Something I've heard of twice recently is porous metal castings on new, replacement casings. No fun...
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Post by kru251 on Jan 13, 2013 15:38:03 GMT
Nik. Maybe SIP get their rims done at the same place then ?
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Post by sbwnik on Jan 13, 2013 21:13:49 GMT
LOL, no joy with them then?
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Post by kru251 on Jan 13, 2013 21:25:05 GMT
To be honest Nik I haven't followed it up with my friendly dealer yet who supplied them; so tomorrow I'll give 'em a call.
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