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Hello gang,
First time engine rebuilder wannabe here...vespa p200e 1979.

it all started when something fell in the crankshaft while I was cleaning air filter...and then I told myself "what the heck...I have to open anyway". Scooter also didn't start easily and I had to push it downhill for a while before it did (starting with kickstart was impossible). When I measured compression it was around 90, so fairly low

YouTube video and parts from scooterwest and I started

Couple of questions for the expert pls:

1) what product do I use (if any) to clean the e give parts, particularly the big crankshaft cases etc?

2) what type of oil do I use to lubricate after cleaning when I put it back?

3) looking at this picture...do cylinder and head look ok to you? The piston has a black carbon patina at the top and the ring look fairly loose and rotate freely (but maybe that's ok)

Thanks in advance![/img]
Cylinder and head
Cylinder and head
Piston
Piston
Case
Case
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first and foremost, did you get out what you dropped in?

90psi is low, you may be able to bring back the compression with rings and a hone. check and see what your current size bore and ring gap are.

I use gas and a parts brush to clean cases. because they're aluminum you don't need any oil on them. WD 40 will protect and of the steel parts.

when you're this far in at minimum you should be thinking seals, cross and soft parts. check the gears and what not. but if it's not been opened before or it's got mileage it may be due for a full overhaul.
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Thanks greasy125!

Regarding your question whether I got what fell in...yes and no. Yes because I did find a spring sitting there. No because the crankshaft / bearing seem stuck: they dotm rotate and I could not push the crankshaft our of the bearing (i was using hammer beatinf lretty hard but it barely moved - , I now also ordered the proper tool).
I am afraid something went wrong around there....waiting for the crankshaft removal tool to have another go
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greasy125 wrote:
first and foremost, did you get out what you dropped in?

90psi is low, you may be able to bring back the compression with rings and a hone. check and see what your current size bore and ring gap are.

I use gas and a parts brush to clean cases. because they're aluminum you don't need any oil on them. WD 40 will protect and of the steel parts.

when you're this far in at minimum you should be thinking seals, cross and soft parts. check the gears and what not. but if it's not been opened before or it's got mileage it may be due for a full overhaul.
I have come back to gasoline for cleaning parts. For some reason, it became a no-no, but can't be worse than anything else you buy in a spray can. When I can, I use Dawn and really hot water to minimize my exposure to toxins. It works much better than expected, but sometimes, gasoline is just the thing…especially when it seems to become farty and inefficient almost overnight, you may as well use it for something.
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What about carburetor cleaners?
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Vituzzo wrote:
.... because the crankshaft / bearing seem stuck: they dotm rotate and I could not push the crankshaft our of the bearing (i was using hammer beatinf lretty hard but it barely moved)...
does the crank not rotate but you're able to wiggle the rod? then the webs are probably jammed up into the case (bad news, probably)

the whole shebang doesn't move at all, probably twisted the crank beating on it and pinched the rod.

something is borked. the crank should come out of the bearing fairly easily with a few love taps from a hammer.

looks like your parts basket is growing rapidly.
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Vituzzo wrote:
What about carburetor cleaners?
carb cleaner is expensive AF and dries out quickly. it's also crazy with the fumes if you don't use it in a wide open area.

gas and a parts brush is tedious but works like gangbusters and is cheap.

ZEP commercial degreaser is works okay too, just more elbow grease involved.
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greasy125 wrote:
carb cleaner is expensive AF and dries out quickly. it's also crazy with the fumes if you don't use it in a wide open area.

gas and a parts brush is tedious but works like gangbusters and is cheap.

ZEP commercial degreaser is works okay too, just more elbow grease involved.
Pine-Sol, believe it or not, is very inexpensive to clean carbs. soak it overnight in 100%. rinse with hot water.
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Thank you
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Wow, Haven't heard "borked" since the 90's!
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GickSpeed wrote:
Pine-Sol, believe it or not, is very inexpensive to clean carbs. soak it overnight in 100%. rinse with hot water.
oh, no doubt. I've used it and it works. I don't think I could get down on a whole case with it though. it's just so, so powerfully fragrant.

for carbs, I'm old school.
External inline image provided by member with no explanatory text

not ideal for the hobbyist, but the death dip gets a work out at my shop. also fits a 1850 easily!
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Go greasy! I remember when all carb cleaners had the skull and crossbones of death on the container ... back when Berryman's actually removed gunk from carbs (and dissolved your skin).

Those were the days!
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Carb Cleaner. Finger Print Remover.
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SoCalGuy wrote:
Go greasy! I remember when all carb cleaners had the skull and crossbones of death on the container ... back when Berryman's actually removed gunk from carbs (and dissolved your skin).

Those were the days!
hah! that actually IS Berryman's! and not the BS kind you get at vato-zone. real deal pull the paint off, stank up the whole shop, attempt not to get any of it on you nastyness.







just don't ask how I got it here in CA
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Birdsnest wrote:
Carb Cleaner. Finger Print Remover.
also doubles as a great cologne!
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