Project: Vespa 300 SUPER (should end up living up that name)

[sleeper125IE]

This is a photo of my injector, i'm sorry for the crappy iphone pic but i think you can see the necessary details...

[Micah / AF1 Racing]

Yes, exact same injector...which is about correct size on the 125 ie.

[sleeper125IE]

nice to know, tnx Micah !

[sleeper125IE]

also, on a Belgian vespa forum we have somebody that sees his fuel lines perrish before his eyes and another member's vespa turned into a big ball of flames during his trip to italy(maybe there is a connection ?) but somebody else that also is a mechanic was talking about a vapor lock waiting to happen with the routing of the stock fuel lines, what's your vision about that Micah ?

[banzairx7]

Vapor lock isn't possible on the EFI Vespas. The fuel pump sits in the fuel tank. If it was external then maybe... but it isn't.

[Micah / AF1 Racing]

I could see some "boil off" happening in the fuel line near the motor due to rising heat after the scooter is parked...but that would at worst add only a few extra cranking cycles before there was enough to run properly. To set the bike on fire would be quite easy if a fuel line quick coupler were installed improperly.

Doing the REXXER flash right now, changing target af/r's in closed loop to 13.0-13.2, upping rev limit to 10,400rpm and adding four degrees of ignition advance across the board as a first step...really cool friggin package that REXXER. Nothing crazy with fuel trims, need to see how this round of flashing works on a stock and on my 300 first. Once we get full software editor version the tuning possibilities are insane...turbocharging may get much easier since PCIIIUSB or PCV trims can be edited into the stock ecu once we are happy with them...cleaning up some clutter.

Once a near perfect basic flash is worked out for the Basic Power Upgrades like the Malossi V4 head, pipe and modded airbox the possibility of making your Vespa wicked will be as easy as buying the above mentioned parts, and buying an injector and ecu flash from us...roadmap to pure scootering insanity! I love it!

Rexxer plugs into the diagnostic connector, the + side of the battery and ground....



It is not a fast process to copy the stock map file to make edits...but so far everything is looking like we can play with it!



20 minutes later...still downloading....

[viasevenvai]

I could see some "boil off" happening in the fuel line near the motor due to rising heat after the scooter is parked...but that would at worst add only a few extra cranking cycles before there was enough to run properly. To set the bike on fire would be quite easy if a fuel line quick coupler were installed improperly.

Doing the REXXER flash right now, changing target af/r's in closed loop to 13.0-13.2, upping rev limit to 10,400rpm and adding four degrees of ignition advance across the board as a first step...really cool friggin package that REXXER. Nothing crazy with fuel trims, need to see how this round of flashing works on a stock and on my 300 first. Once we get full software editor version the tuning possibilities are insane...turbocharging may get much easier since PCIIIUSB or PCV trims can be edited into the stock ecu once we are happy with them...cleaning up some clutter.

Once a near perfect basic flash is worked out for the Basic Power Upgrades like the Malossi V4 head, pipe and modded airbox the possibility of making your Vespa wicked will be as easy as buying the above mentioned parts, and buying an injector and ecu flash from us...roadmap to pure scootering insanity! I love it!

That is awesome. VTC (Vespa Traction Control) would be nice. VWC, VLC, VABS......if you get around to it

[sleeper125IE]

i think i need to send my engine to you guys so you can do the same on my 125 :-) (if i had a 300 i was already transferring the money for a NA kit right now :-p )

if i see what i managed to do with the engine with plug and play stuff and some fine tuning i can only imagine what you guys would do with it :-D

[Micah / AF1 Racing]

It would not be that hard to adapt a Bazzaz ZfiTC to the scooter if traction control is really desired, I prefer the rawness however and not relying on electronics to save my ass...though as my BMW car has shown me sometimes those electronics are smarter and sharper than I am!

The thing that surprises me is how few Vespa riders do anything more than cosmetic mods. There is no magic in what we have been doing, we just decided to see where the motor could go with SIMPLE mods and this where we have gotten to so far.

If anyone wants a pre built Vespa 300 "SUPER" I suppose we can pretty easily add a mod package to the new sale of a bike. For 99.99% of owners the Malossi V4 head (ported for obvious reason) along with their high compression big bore cylinder, an Akro pipe, some sliders and a modified airbox combined with the 200-215cc injector and a quick reflash would be about as far as you would want to go, and should be about as reliable as stock...belt life will be shorter as will rear clutch life, other than that the bike would be stock like but with big (for a scooter) power while still getting really good fuel economy.

Anyone have a slider weight recommendation for me? Gonna have try a few sets before I replace the belt. Dyno is down for a week or so until new control computer is in and online...thanks lightning!

[sleeper125IE]

Micah, how much do you estimate the N/A upgrade kit you are planning to sell ?

i'm on the fence for buying a slightly used 300 engine and plant it under my 125 but i do not now if that would work, i have a electric waterpump, the 300 mehcanical, and is the subframe for the engine the same etc ??
if this engine would fit without a load of problems im interested in your upgrade kit :-)

[Micah / AF1 Racing]

I have a couple of subframe engine holder assemblies that bolt onto the larger chassis from wrecked scooters, if yours is different then I know where to grab one from for cheap. We are not actually stocking Malosdi parts really right now, so we would need to get that ball rolling with either an importer or direct to Malossi before I could quote accurate pricing. The porting takes 3 hours in total to make pretty so that part is about $300, injectors are about $100 each (obviously only one required) and once we get the flashes refined to the point of being exactly right they will be $200 for any computer shipped in. Airbox mod is an at home easy free thing, get the pipe of your choice $200-$600 range. On Malossi's home page they have a complete cylinder, piston and head kit priced out at around €750.

Not sure this is totally helpful but should give a good idea. Final drive gear sets are about €98 and new bearings and instal take about an hour if motor is already out of chassis. This would be a purely optional thing and definitely not required unless a high top speed is desired more than strong acceleration with a close to stock top speed. With rev limit at 10,400 rpm the stock gears should allow for about a 90 mph real top speed.


Pics from playing around with porting a throttle body...I have never done this on an efi bike but back in the carb days....this sort of thing worked pretty well IF air velocity was high enough at the throttle plate to matter...it definitely is on the Vespa! Here you can see the bolt heads ground flush and a bit of edging done on the trailing edge of the throttle plate....




Looking down the throttle body...no more obstructions, can do more, this was 20 minutes of playing around with a spare TB to make sure I would not fuck up my TB when it came time to play with the grinder again...had to kill a little time waiting for kiddo to show up for ride home from town....




This is the back side...compare to earlier pics of the dead stock TB, flow is improved by about 10%, this however means nothing, a bigger hole always flows more air, we care about trapping efficiency!





Front side grinds...perfect seal still so it looks like a go to try this mod next!





A little polish...so it looks cool, nothing to find here in terms of power gains from making something shiny...

[Micah / AF1 Racing]

Rexxer flash installed and running...much crisper response from part throttle, no more backfires at all. Fun damn scooter, due to my current lack of a working dyno I did some street trim learning on big hills around here...so far so good!

[jrflanne]

Ima gonna hafta rida that thinga. It sounds like a serious hoot! The Malossi kit on my GT200 is great. I even battle down I10 in Hosetown on it. The look a little weird at me on the scooter and all but the 300? It is sounding like some of your usual awesome work.

[Micah / AF1 Racing]

Got the dyno back online...calibrating now, will hopefully get a chance to see if the Rexxer flash was able to nail my af/r target and see if there is any more power to be had above 9.3k rpm, rev limiter now 10,400rpm. Got a big backlog of dyno bikes from being without working dyno for a week so...may or may not happen.