Modern Vespa

Anyone have any experience with this kit that I just saw listed on the Scooterworks site? It is new.

I was wondering what it would do for the top speed of my VBB, which is 45mph if the moon, sun, and stars align.

it's the best kit you can just bolt onto a 2 port engine, that's for sure.

I mean, the BEST thing you can do is get a 3rd port cut in those cases of yours, and use a 3 port kit ... but this is certainly the next best thing ...and likely kicks the crap out of the DR180 kit.

Hello, I am runnning this kit on a 65 Sprint. There is not much info on setting it up. I am running a 20/20 with a Sito+. Its pretty quick. I just got a 24/24 today and plan on hooking it up Thursday. It is a direct bolt on. There are not many in the US due to the shipping cost from SIP. Now that Scooter Works has them there should be a lot more info coming out about set ups and dialing it in.

Tell me more about the three port head..... Is it a big difference from the 2 port if I take the time to cut the third passage? I was looking at my stock head, and the intake passages have a nasty ridge where the sleeve meets the case. Is there any good information floating around out there on this specific to the Vespa? I am guessing with the right expansion chamber there is a lot of port/rotary valve modifications that would help.

Cutting the third port is certainly the best option for you... some people don't want to take their engine apart enough to build up the meat on the flyside, and then hack into it with a dremel.

I'm sure there's some web resources on it. Ultimately, if you order the kit you should be able to see where the port needs to go.

Anytime you buy ANY kit, you should be doing a little bit of port enlargement to make the cases match the ports on the cylinder for optimal flow and whatnot.

keep in mind though that to add a third port on the early two port cases (vbb/vnb) you will need to have a bit of material welded in, as the stock case does not extend all the way to the gasket surface. After welding (assuming they do it right and don't warp the cases) you will then need it machined back down to flat with the gasket surface.

On the later two port cases (sprint/super) it's just a mater of cutting the port.

agreed

i personaly have not cut the case on a bike

i have had my cases cut and watched and helped(clean up mess)

i have no problem doing it myself , just prefer to use a wrencher cause i can

with that said, all kits come with a gasket wich also works as a stencile

you put the gasket on the case and with a machinest pen or a sharp point sharpe you match the cut outs on the gasket to the case

remove gasket

pack the case opening with rags or toilet paper and cut and smooth the case

now,there is so much more to it than just cutting,but basically that is the idea

for that you should consult a web site or scooter wrencher for that.

The new Pinasco kit has the third port in it. It is ported through the piston instead of the walls of the cylinder. This is the way smallframes are done and there is no lack of power there. Your VBB has a top speed of 45mph and your engine turning 5000rpm to do that. The Pinasco kit is going to net you a higher rpm speed there for a higher top speed. I'm not sure of the number but I would say a 1500rpm increase on the top end is easily possible with a 20/20 carb and a non-cat PX125/150 exhaust and still leave you good ground clearance. At an est. 6500rpms your VBB will have a top speed of 60mph.

i love that math

And in some cases, even less than that: my '78 Eurospec (MK II) Super 150 already had three port cases, but the cylinder and piston were still two port. I didn't even have to do any cutting, just get a three port jug and piston for an instant boost. I'm not sure if all later Supers are like that (i.e. the ones that have the PX flywheel that require a puller, rather than having a circlip) or just certain ones.

Yes, all late supers with the px type flywheel/crank has a third port cut but with a 2port jug.

It's by far the best kit I have ever had . I have had Mallosi , pollini etc.. I have a 64 allstate with 20/20 deloroto 125 jet , Simonini exhaust and the new Pinasco 177 . The third port gives a giant breath to you're scoot . No porting needed no matching either .As fast as I would ever want to go on 8 inch . It bolts straight on no messing around . I recommend strongly if you love a 60's eight inch but hate how slow they can be .

ive used the ASC 166 two port kit on my VBB and love it, way less expensive then the pinasco but still pretty good quality, forged piston and chrome lined wire drawn rings, they had them made in taiwan. i can hit 60 with a sprint exhaust and a 20SI. i compared the port work with other kits and found the exhaust port on the 166 2 port was almost dead on to a malossi and the transfers looked good too. if you want to save some scratch id go with the ASC kit over the pinasco but if you got the funds pinasco quality is really good.

Pinasco 177 kit was designed to match up with 60's Vespa 125/150 models in the ports . Unlike the Malossi of wich you have to match the ports .

i more concerned with more power pulling up steep hills. would this setup help?

166 asc kit, or pinasco 177 kit, asc bigbore exhaust, and 20 or 24 carb. that should help uphill, and quit eating cheeseburgers.

Sorry Jimmy couldn't help myself. Scriber.

what do i know

I actually googled machinist pen and got some interesting results....

machinist talking about firearms modifications.

http://www.practicalmachinist.com/vb/showthread.php/pen-guns-189896.html

thanks. i actually lost 10 pounds since july but it ain't helpin'.

tuning program by slimfast!

best,
-greasy

If your cases are VBB cases there is really only one good and right way to cut the third port in. Because your cases are early 2 ports (pre-three port) you need to have alumn. material welded to the cases where the cylinder base sits. So there there is enough surface material to match the port and have room for the gasket. It is great upgrade if you want to spend the time and money. It requires taking your whole engine apart and getting it to a good machinist that knows a thing or two.

I might be doing this with a spare set of cases that I have, along with a stella top end and reed valve for shits and giggles.....

Personally, I would run the Pinasco kit. Make sure to measure the piston to cyl clearances as a close friend of mine bought a kit from the first run that was way to tight and had to get it bored. Pinasco mentioned that the second run was going to be "revised".

I recommend that you use a two port performance cylinder kit for the two port motor and to keep it simple. Just do the bolt on first and match your stock carburetor main jets; atomizer and atomizer jet; and exhaust. When you have to grind open up the ports or any other machine work on the case, you have to split it and remove all parts; and then begin the work. Those metal shavings are not so good for the motor. When you have it all figured out and gained some experience, then go for it. Once you split the case, you may as well go for the full rebuilt and the recommended manufacture kit configuration. Pinasco has info in there installation manual regarding to suggest performance upgrading and machining. I recommended following it to the T, if you want the reliability and longevity. Pinasco have been in the business for over 30 years and are one of the top kits manufactures.

I have installed, bolt on only, a Pinasco 177 Au three port in my PX 150 with a reconfigure 20/20 stock carburetor, 112 main jet-Be3 atomizer with a 160 jet, and Sito plus. So far I have been very happy with the improvements; it is reliable and I had no problems; and that is the first time around. I have decided for now, "if it ain't broken, don't fix it." My PX is that much improved. When I decide or have too split the crank, that is when I am going to match and port; install the precut crank etc... It will be a complete top and bottom rebuild.

Just my two cents worth

rudy

Is the consensus here that for 2-port kits, the Pinasco 177 is tops, followed by the ASC 166? And the ASC big bore exhaust is the best choice for the money (when available)? And a 20/20 carb, appropriately jetted?

Edit: By "tops" I mean the best of the simple bolt-on upgrades.

to add on: pinasco just announced a new 2 port 177 kit.... IN ALUMINUM!

Just finished the 7th one of these kits and its amazing,,, now if it would warm up some to get some miles on it ....

cutting the port is very easy with a nice draw file and you can buff it up afterwards ....


I have photos just need to try to put them with each bike they go to...

I love to see those pics!