Finally!

[Big Daddy T]

Hi there,
I tried registering here two months ago, and I never got an email from administers so I tried again and TA DA. Let me introduce myself. I'm a twenty year old the rides around on a '03 XR650L. As fun as that bike is I've looked at scooters more and more. There is something just, odd, and fun about a scooter. I like that :luvdoc: . I've got a few qustions to ask, but I'll make sure to put them in the propper section.

Question for this section:

The Aprilia SR50 R FACTORY DITECH looks like a peppy little scooter. How many modifications would it take to get a Zuma to have the same/better formance?

[Aviatrixie]

Welcome aboard, Big Datty T... I'm glad you finally found the key to the kingdom. And yes... scooters are a ball.

The Aprilia Ditech is an impressive scoot; very high tech. It's all about the direct injection system, but I get the impression the direct injection improves fuel efficiency and pollution control more than providing out and out power. Supposedly it will be able to pass the 2006 EPA restrictions on emissions. That being said it will remain a normally aspirated engine and likely will not perform as well as a scooter with an expansion chamber, and I'm not at all sure a chamber will work with direct injection. At the very least it would require reprograming of the EFI control unit.

from Aprilia's website:

The new DITECH direct electronic injection is one generation ahead of the rest. Unlike traditional two-stroke engines, the petrol is no longer mixed with the oil and air in the crankcase, but rather injected directly into the combustion chamber by a sophisticated injector, managed by an electronic control unit. The fuel is injected only when the exhaust ports are closed: this significantly minimises the emission of unburned fuel and oil into the exhaust, and thus the environment. The "heart" of the DITECH technology is the Air-Fuel-Rail, made up of the Fuel Injector, which doses the exact amount of petrol, and the Direct Injector, which mixes the petrol and the air from the compressor, and sends it into the combustion chamber. The fuel/air mix is atomised into particles measuring just 8 microns (against the approx. 50 microns in automobile injection systems), the density of which is controlled so as to maintain ideal combustion, drastically cutting fuel consumption and further improving performance. The entire process is managed by a sophisticated electronic control unit, which optimises the operation of the engine at all times, and signals any faults instantly: in this way, the performance is always "top", and maintenance is much simpler and less costly.


Hi there,
I tried registering here two months ago, and I never got an email from administers so I tried again and TA DA. Let me introduce myself. I'm a twenty year old the rides around on a '03 XR650L. As fun as that bike is I've looked at scooters more and more. There is something just, odd, and fun about a scooter. I like that :luvdoc: . I've got a few qustions to ask, but I'll make sure to put them in the propper section.

Question for this section:

The Aprilia SR50 R FACTORY DITECH looks like a peppy little scooter. How many modifications would it take to get a Zuma to have the same/better formance?

[Big Daddy T]

So it'd be safe to assume that a Zuma with a 70cc kit would already be more powerful than the Aprilia?

[Aviatrixie]

I'm working with limited information, but with what I know about the DiTech, yes. Now... if the fuel/air compressor can be set to induce higher than standard atmospheric pressure in the combustion chamber at intake then all bets are off... but I don't have enough info on it at this time.

So it'd be safe to assume that a Zuma with a 70cc kit would already be more powerful than the Aprilia?

[Big Daddy T]

Thanks for the info, Aviatrixie.

Oh, and don't forget to check out my other post in the lifestyle section. :)

[Aviatrixie]

You're quite welcome... and I will. :)



Thanks for the info, Aviatrixie.

Oh, and don't forget to check out my other post in the lifestyle section. :)

[pinkymingeo]

The SR50 costs +50% more than a Zuma. You can buy a lot of performance for that grand.

[XPS1210]

the cool thing about the SR50, it's fuel injected... but I'm sure that makes it more expensive to mod as well...

for a grand you can get that zuma doing a good 55 mph or better... so spend less on the zuma and upgrade...

[King Vino]

I've looked at the mods to the SR50, they're pretty affordable much to my surprise. BTW: Why is an Aprila question in the Zuma forum?

[scooterconvert]

Also remember Big Daddy that performance upgrades are going to compromise the life of the scoot. If you spend more money for a bigger scoot than you'll probably have a more reliable scoot than a kitted 50cc scoot.

[XPS1210]

on the other hand... you can use 2 or 3 rebuilds at least... before you get to the $5800 cost of a 500cc scooter...

That's $4000 worth of upgrades...

[Lennox]

on the other hand... you can use 2 or 3 rebuilds at least... before you get to the $5800 cost of a 500cc scooter...

That's $4000 worth of upgrades...
upgrades-maintenance-rebuilds

[scooterconvert]

Let me clarify, 150cc is a bigger scoot to me. Sorry I forgot to say that. I know the 500cc's are technically scoots, but when I think of scooter, I picture a smaller bike overall

[XPS1210]

well.. but a 150cc 4 stroke... Isn't gonna be that much faster...

they do about 50-55 out of the box right?

and a zuma does 40-42... and a stage 2 kit, VERY MILD, and can last 10K if tuned correctly, can go 55ish... so your still looking at less than the 150cc to start... and you have the 2 stroke fun over a 4 stroke... which even in a 150, can't be an fun....

[Big Daddy T]

BTW: Why is an Aprila question in the Zuma forum?

Because I'm asking about a comparison to the Zuma...

[Big Daddy T]

So, why is it that there are so many aftermarket parts for the Zuma compared to other scooters?

[pinkymingeo]

There aren't a lot of parts, actually. When the bugeye first came out nobody could figure what fit it. Happily, it has a Horizontal Minarelli engine for which there's a world of parts available. Body parts? Forget it.