Modern Vespa

I am now the proud owner of a brand new fuel injected LX150ie.
Yep, only 250km on the clock.
I wanted the smaller air cooled version and I intend to fit the Malossi 190 kit, and Sito+ exhuast.

Does anyone know if I will experience any issues with the fuel injection unit by fitting this mod?
I hear people upsizing jets in carbie models and wondered if I am going to hit any issues with the fuel injection?

Thanks.

I've been curious about this as well, but all I can do as speculate as I have a carbed LX150 that I'll be installing the kit on in a few weeks.

Assuming Piaggio didn't change anything in the bottom end or the cylinder body itself -- or in the mating of the head -- when they went to the EFI, I can't think of a reason the kit wouldn't work on the fuel injected model. I'm guessing that the only parameters that the EFI monitors are intake air mass and exhaust gasses, and that it automatically makes necessary adjustments to keep the combustion mixture optimal (the EFI would just sense the increased displacement via the air mass sensor the same way it would as if the stock engine were revving higher).

If I'm wrong-headed in this thinking, any fuel-injection gurus care to straighten me out? Is there an rpm sensor that is mapped against air mass that might be confused by the change in displacement?

In theory it should be fine as the ECU will adapt the fueling to suit and all will be lovely, the problem comes when the boundarys are pushed too far, as the ECU is just a computer program and as such has a set of written rules to follow.. and with some modifications you alter the parameters to much and go beyond the limits it was programmed for and it therefore thinks theres a fault and sticks the warning light on.

Thanks, cheekythomas... you've confirmed what I've suspected. I doubt if a 25% increase in displacement will send the software off the deep end.

I'll be interested in hearing how the kit works out for SquizMan.

Here is the question does the 150ie use an oxygen sensor? If it does there should be no problem. The computer will do a better job changing fuel delivery if it can see oxygen content in the exhaust.
Chris

Thanks. The scooter shop says that Vespa just stuck the same fuel injection unit on my 150 as is on the 250. So I hope that means that it wont have any trouble.
I might just get mine done before you Silver Streak.
I want to get a few more tank loads done so I can accurately gauge the fuel economy change.
The kids keep wanting to come when I go riding and that doesn't give me a true reading on the economy. I guess the fun of a new thing will wear out soon and they will find something on TV more interesting soon

the 150ie has the 4 valve head right?

If so make double triple sure that the 190 kit will fit.

I think just the 50 cc bikes got the quatro. Sadly.

Yeah, the specs I read on the 150i.e. said two valves.

The kit alone is worthless without the gear up kit uprated camshaft etc.
My Scooter mechanic is frustrated with The mods on his own LX as they were way off his expectations. After thousands of dollars spent on cylinder kit, up gear kit, valve grinding/porting/flowing, carb adjustments..Headache tablets.
He is over the whole thing and wished he had just left it stock. Unless you have plenty of money and a Formula 1 tech team at your disposal, I would stay well clear.

Indeed, it costs a lot and the gain in performance is not WOAW!!!

I would not do it again. Better to get a driving licence and a 300.

I ran into the same problem with my 09 Zuma 125. I was buying all the new stuff for it from Taiwan through a friend because you really couldn't get any performance parts for it here yet. Everything was trial and error since it was so new. Anything I needed would take 2 weeks to get from Taipei. I had everything you mentioned plus more. I really racked up the $$ I put into it and it still wasn't capable of doing the kind of riding my 300 can. A power commander was needed with the cylinder kits as well as a new re-mapping. That was a $300 investment for the re-mapping device alone.

I had a little heart to heart and I parted out the aftermarket items, sold the Zuma and bought the 300 Super. It seemed a natural transition to a Vespa since I already had a 69 Rally 180.

I loved the little 125 and without a doubt its the BEST 125 on the market, it just couldn't do the highway legally or safely. In a few months the aftermarket for the new Zuma will be choked with speed parts and you will see some crazy stuff on the Zumas.

I agree. It's all too easy to look at a website like SIP or Scooter Center Köln and work out where your next £/EUR 1,000 is going, but I prefer the physical size of the LX. I realise it'll never be a rocket ship, and I wouldn't want it to be, on those little wheels. So I plan on changing the variator only. Then once the stock exhaust rots through, I'll get a Sito Plus (or maybe a PM, as a gift for saving myself loads of money by not buying all of the other tuning goodies).

Im a little doubtful... it cant adjust for airbox removal, so a increase in CC might be too much, but without trying you wont know... the system only allows enough adjustment to allow for wear and tear, and temperature changes, not a 25% increase in capacity as well...

... it wont do any harm in any case, it wont run lean and damage something, just stick the ECU light unit on and run like a dog.

Hello friends.
There is one topic where we talk about software and programming IE LX. I think we can give a look on the booth.
here:
[/url MIU programming]
Best regards.

That is a little vague. And a bit off, according to many people who have done the cylinder alone. Granted it seems like doing several things at once would create a synergy, but they do seem to like it.

Re: your wrenching buddy: Is it not meeting his expectations because:
1. he thought it was going to be a screaming two-wheeled Porsche,
2. because he screwed it up,
3. because it was uncharted territory and there was always something else to do,
4. or because it just cost too much time and money,
5. or...??

It seems to me that when you increase displacement, improve breathing, etc. you gotta have a smile on your face.




[/quote]The kit alone is worthless without the gear up kit uprated camshaft etc.
My Scooter mechanic is frustrated with The mods on his own LX as they were way off his expectations. After thousands of dollars spent on cylinder kit, up gear kit, valve grinding/porting/flowing, carb adjustments..Headache tablets.
He is over the whole thing and wished he had just left it stock. Unless you have plenty of money and a Formula 1 tech team at your disposal, I would stay well clear.[/quote]