Ingram's 2005 Piaggio Typhoon 50

[ingram]

My second scooter I picked up is a 2005 Piaggio Typhoon 50 US model. It only has 900 miles on it but has been sitting in the weather for a while so there is some light rust and the carburetor needs a good cleaning. When I went to check it out in person is started right up and ran pretty good except at full throttle it was bogging so I knew something was a little off. I am hoping to keep the stock cylinder for a while and just remove the carb restrictor, upjet, and put a new sport exhaust to eliminate the emissions items. This will be my secondary scoot for my wife to ride with me or my boys when they get older.




After getting it home and further inspection I realized the intake manifold rubber was super flexible and I could see it was cracked at the base when I wiggled the carb around so definitely has an air leak there and needs a new intake manifold.

The carb is a 17.5mm Dellorto PHVA which I pulled off and took it apart and it looks like it had gas sitting in it for a long time. I ordered a gasket kit for it so will be cleaning it and replacing all the gaskets. There is some epoxy like substance in the float bowl area that I have no idea if it is supposed to be there or not. I don't have experience with this particular carb but it looks like the epoxy substance is plugging up a hole that goes from the float bowl to the intake of the carb.

Then I pulled the variator cover off and the transmission looks fine but I don't see any oil in the lines going in or out of the oil pump so I assume it ran out of oil at some point or the pump is bad. The previous owner said he just filled up the oil tank and I can see oil to the top of the tank but its just not in the lines leading to the pump or after the pump.

I ordered a new oil pump for it but now I'm concerned about how long it was driven like this and if my cylinder needs to be replaced or even worse the crank and bearings. If I have too much trouble getting it to run right with stock cylinder I will probably just go for the Malossi Sport BBK.

I purchased the following items so far:

• Malossi Intake Manifold for Piaggio
• Oil Pump for Vespa ET2, Piaggio
  
• Reed Valve Motoforce Racing Piaggio
• Exhaust Polini Speed Piaggio (Same as Malossi Wild Lion)
• Oil Seal for Crankshaft Piaggio
• Malossi Double Foam Air Filter for SR 50 & Derbi (1414497)
• NGK BR9ES Spark Plugs
• Ethanol Resistant Fuel Valve for Vespa, Aprilia, Piaggio CHROME
• Variator roller weights adjustment set Polini: 19x15.5mm 4.50g 5.00g 5.50g 6.00g
  

[ingram]

Here are a couple pictures of the carburetor. Can anyone tell me if the epoxy like substance is supposed to be there on these Dellorto PHVA carbs? It's in the first picture top right of the float. Originally I thought it was just gunk but after touching it with a flathead screwdriver it's a hard substance so I didn't want to force it out completely if it is supposed to stay. when holding it up to a light there is a hole under it that leads to the carb intake so at the moment it's plugging that hole.




I took out the sparkplug and it looks pretty bad. I will definitely be putting in a new one.

[pinkscoot]

Nice find. You'll like those Piggy motors. A good source fo Cheap Malossi parts is Scooterpartsco.com. You also have AF1Racing in Austin that has and can get you most OEM parts. They also have all of the parts catalogs on line.

[aeroxbud]

My PHVA 17.5 typhoon carb does not have that whatever it is in it. But it's a Euro 4.
My old aerox aftermarket delly and my new aerox PHVA does not have that in either.
Remove the restriction plate from the carb while your at it.👍

[ingram]

Nov 5, 2020 11:52:04 GMT -5 aeroxbud said:

My PHVA 17.5 typhoon carb does not have that whatever it is in it. But it's a Euro 4.
My old aerox aftermarket delly and my new aerox PHVA does not have that in either.
Remove the restriction plate from the carb while your at it.👍

Will do. Yeah it definitely looks out of place so good to hear yours doesn't have it.

[Lucass2T]

Nov 5, 2020 11:52:04 GMT -5 aeroxbud said:

Remove the restriction plate from the carb while your at it.👍

Theres one under the intake boot too!

[aeroxbud]

Never seen that one before. Pretty sure it's not on mine.

[ingram]

Nov 5, 2020 16:40:33 GMT -5 Lucass2T said:

Theres one under the intake boot too!

Ah interesting I will definitely look for it when I take the intake manifold off and remove it if it’s there.

[ingram]

Quick update I used some gift card money to get a DR70 kit for this scoot. I took the cylinder out of the box and I am really impressed with how this DR70 looks actually. I was expecting lower quality than the Corsa I just got for my Zuma but not at all it easily compares quality wise to the Corsa so I am very happy so far. Excited to see how it feels after I get it installed.

The bore is just slightly larger than the Corsa for my Zuma which I have seen references to this being a 72cc kit so maybe that 2cc difference is the reason and the piston is heavier and is more reinforced on the inside. Casting is really good and I just slightly chamfered all the ports and working on polishing the exhaust port next.

The only thing is the exhaust outlet is just slightly smaller than it looks like it should be. You can see in the picture below it doesn't extend out to the edges but looks like it should. I am not concerned since I am just using it as a reliable sport build but I read these cylinders are ported easily so I assume this exhaust outlet is typically enlarged to match the exit port when trying to extract more performance out of it.

[aeroxbud]

It would be very tempting to open the exhaust port out. Probably won't make much of a difference, unless you raise the height inside.I
Is the exhaust mount a separate piece from the casting?
Quality looks good on the bore. The piston doesn't look quite as good as the Polini. Not bad at all though. 👍

[ingram]

Jan 11, 2021 19:15:05 GMT -5 aeroxbud said:

It would be very tempting to open the exhaust port out. Probably won't make much of a difference, unless you raise the height inside.I
Is the exhaust mount a separate piece from the casting?
Quality looks good on the bore. The piston doesn't look quite as good as the Polini. Not bad at all though. 👍

No the exhaust mount is part of the casting so its all one piece. Here is a better picture that shows the exhaust outlet. You are right it is very tempting... 

[ingram]

Ok I have been busy on this scooter the past week. I did a good washing and de-greasing which made a big difference and then went to work removing some rust spots on the frame and painting to prevent it from coming back. I then installed the DR70 kit and new intake manifold. Used Honda bond on the metal base and head gasket as well as on the reed block and intake manifold. In general this scooter seems simpler to work on than my Zuma and a lot of the components are already upgraded in stock form like carbon reeds, large variator (19x15.5mm rollers) and 128mm rear torque driver along with a 17.5mm carb. I am really excited to see how it performs with the new BBK.

I got my Trailtech Vapor installed in a similar way as my Zuma which turned out really nice on this scooter as well. Next up is getting the NCY throttle grip installed along with the new single cable and then attaching the carb. Decided to just go pre-mix on this one as the oil lines were in bad shape anyway and I don't want to worry about the pump.

My variator, front pulley, and rear torque driver all had rust/corrosion on them unfortunately which using Evaporust on them helped tremendously but still didn't get them back to original condition. It is good enough for now but I will be replacing those components eventually as I am trying to get everything back to as best shape as possible. And of course, it gives me a good excuse to upgrade anyway. 



Draining oil tank and removing since it's going pre-mix.



This spot was under the battery which obviously had leaked acid out and removed the paint from the frame. I repainted it back to black.



Plenty of open access to the engine on this scooter when the rear panels are removed!



The inside of the cylinder actually looked good so the oil pump must have been working despite it didn't look like anything was running through the lines.



Crank is in good shape and still smooth so no worries there.



Gotta have a side by side pic of the new and old cylinder.






No restrictions under the manifold on this one.



Nice surprise to find carbon reeds are stock for this scooter.



More disassembly to clean and get the front panels off for running the new throttle cable.




Here are the results after doing as much as I could with Evaporust, WD40, and a wire brush. I didn't get any before pics sorry.






I was just able to squeeze a couple screws to mount the Vapor on the small space in between the gauge and plastic trim wall.




I am really happy with the results!




The wires routed without issues against the gauge cluster which I was worried about but it turned out to not be an issue.

[aeroxbud]

Coming along nicely.
The Piaggio motors do have some better features than the Yamaha platforms. The drive train is much stronger stock.
Did you fit a new small end bearing while in there?

[ingram]

Feb 5, 2021 19:25:09 GMT -5 aeroxbud said:

Coming along nicely.
The Piaggio motors do have some better features than the Yamaha platforms. The drive train is much stronger stock.
Did you fit a new small end bearing while in there?

Yes I got a Doppler one which was 12x17x15 and about 1mm wider than the stock bearing and it fit just right on the new DR70 piston. Originally I had bought the Malossi 12x17x16 bearing but it was too wide to fit on the piston.

[Lucass2T]

Looks good! And no restrictor which is even better!