Mikals SR50(2009 Piaggio Purejet) carb conversion

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mikal
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Mikals SR50(2009 Piaggio Purejet) carb conversion

Postby mikal » Fri Jul 11, 2008 1:15 pm

Well gang, here she is. I got this thing last night, and I actually am impressed with its performance stock. Its not fast, but it feels good. Its an entirely different beast than my Zuma was. My top speed so far has been 56MPH down a slight grade of hill, but it wasn't long or steep. Cruising on flats is about 51-53MPH. The suspension is great, and so are the brakes. As from this year, the rear shock is a larger diameter, and it comes with steel brake lines.

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Last edited by mikal on Wed Jul 25, 2012 8:58 pm, edited 1 time in total.
Good intensions, poor results.

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speedfreak76
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Postby speedfreak76 » Fri Jul 11, 2008 1:37 pm

Sweet! Lookin Hot! Has it been derestricted yet? Congradulations! :D
2005 CPI GTR
Stock, for now...

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OveRReV
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Postby OveRReV » Sat Jul 12, 2008 2:07 am

very nice scooter, at least it's got a Piaggio engine instad of that Morini sucking ditech engine, i'm glad Piaggio bought Aprilia.
Overrev Tuning

mikal
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Postby mikal » Sat Jul 12, 2008 10:26 am

OveRReV wrote:very nice scooter, at least it's got a Piaggio engine instad of that Morini sucking ditech engine, i'm glad Piaggio bought Aprilia.


My friend just bought a morini last week, and my piggy smokes his. Not only a ~5kph top speed, but way better acceleration.

JCMotor- I'll start modding soon. I sent parts back to scootercenter and I'm waiting to see whether they will give me store credit, or refund some money. So far they haven't answered 1 of my 35 emails.
Good intensions, poor results.

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Big B NRG
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Postby Big B NRG » Sat Jul 12, 2008 11:10 am

Nice looking scooter Mike! Really good looking. Must run pretty smooth?
Maybe keep it derestricted and stock?

You got a G moped btw 8)

Really G :P
Will build someday again!

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StepVino
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Postby StepVino » Sat Jul 12, 2008 11:34 am

It really does look very advanced. All the goodies
you would want :). Any details on the engine? LC,
carburetted, injected? Love the instrument cluster.

mikal
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Postby mikal » Sat Jul 12, 2008 1:01 pm

2T ditech with Electronic fuel injection. I believe the venturi size of the intake is 18mm, yet I'm confused still on where what is coming from.

Every part on this thing has a function. There is air intakes that come from the front of the bike to the tranny box, the air is sucked in, then blown out of a maze of plastic in the back by the clutch. There is no kickstarter(wierd).

It comes with 19x15.5 gram rollers, a 107mm clutch and bell. The stock torque driver is the same diameter as the minarelli O/R(134mm?).

Front/rear disc with what I think are steel braided lines. Its pretty easy to lock the rear wheel up:). Liquid cooled, stock compression ratio of 11.5,1.

The ride is quite nice. It took me a while to get used to the size and weight(both on the plus side of the zuma), but I'm really starting to like it.
Good intensions, poor results.

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StepVino
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Postby StepVino » Sat Jul 12, 2008 2:37 pm

Might be the throttle plate size? All very cool! I saw
one of those exhaust pipes on Ebay last year, should have
snapped it up. Wasn't sure if it was just an imitation
expansion chamber, that really did not much more than
the stock pipe, but it seems to work really well. 50+
out of a stock 50cc, is great. I bet the gas mileage
is up there as well?

Can it still be classified as a scooter, if it goes that
fast?

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OveRReV
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Postby OveRReV » Sat Jul 12, 2008 3:00 pm

the stock vario on those new Piaggio engines are very good, you just have to do the vario mod i posted to gain a bit more range (overdrive), saves you money for other stuff instead of buying a vario kit.

stock Piaggio rear pulley is 128mm, Overrange rear pulley (Piaggio) is 134mm, get a Malossi belt for it, some springs & rollers to tune it, along with the other list of parts like a 70cc kit, decent pipe, ECU & tranny mods it'll do 60+mph on a flat road.

get the Malossi kit as the ECU is tuned for it, it's like putting on a different map for the EFI.
Overrev Tuning

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Big B NRG
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Postby Big B NRG » Sun Jul 13, 2008 4:13 am

OveRReV wrote:the stock vario on those new Piaggio engines are very good, you just have to do the vario mod i posted to gain a bit more range (overdrive), saves you money for other stuff instead of buying a vario kit.

stock Piaggio rear pulley is 128mm, Overrange rear pulley (Piaggio) is 134mm, get a Malossi belt for it, some springs & rollers to tune it, along with the other list of parts like a 70cc kit, decent pipe, ECU & tranny mods it'll do 60+mph on a flat road.

get the Malossi kit as the ECU is tuned for it, it's like putting on a different map for the EFI.


Old model Piaggio engines have 128mm pulley (<1998). After 1998 they changed to 134mm pulleys. The only difference between the overrange kit and stock pulleykit are the lanes on the torque pulley.

I think the 70cc kit with upgear (to solve that dip) would be a great investment in keeping your scooter fast and relaible. Like Overrevs says 60+ mph on flat road, cruizing around is no problem.

There is no kickstart because you have a injection scooter. Ever kickstarted a injection motor ;)?

The only think traveling thru your membrane is air. BTW, I think that Roost made an injection model exhaust, that outpreformed the aftermarket parts. Maybe give him an email!

Keep us updated with movies and pics Mike!
Will build someday again!

mikal
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Postby mikal » Sun Jul 20, 2008 12:23 am

Yes, parts are expensive. With the Malossi ECU there is no other tuning
needed for the motor. Only the tranny. Kind of worth the extra cash.

i read the good thing about the purejet motor, is that it will hit a solid 110KPH, and only need to tank once a week.

Time will tell. But for this year I think the only mods will be a pipe(which kind?) and polini super speed vario.
Good intensions, poor results.

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OveRReV
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Postby OveRReV » Sun Jul 20, 2008 4:07 am

if you're going to buy a pipe for it get a quality high performance unit & not just some chromed out POS pipe.
Overrev Tuning

mikal
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Location: Muskegon, MI

Postby mikal » Sun Jul 20, 2008 10:34 am

OverRev- I've been posting and PMing people for a while now asking which
pipe I should get. I haven't gotten a solid response from anyone telling
me that there is one front runner.

The guys on AF1 forums tell me that the Technigas RSII pipe is the best for
the Morini type, and that the Leo Vince is the best pipe for the Piaggio. I
find this info kind of laughable, but its the only info that I've gotten.

I was thinking of getting the Lazer X Pro pipe. It comes in chrome too, Is
this a good pipe?
Good intensions, poor results.

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OveRReV
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Postby OveRReV » Sun Jul 20, 2008 12:36 pm

a Yasuni R pipe might be a good match with the Malossi Ditech kit.
Overrev Tuning

mikal
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Joined: Fri Nov 09, 2007 4:42 pm
Location: Muskegon, MI

Postby mikal » Mon Jul 21, 2008 7:54 am

There is a dyno sheet on Scooter Attack that shows the difference between
1. Completely Stock
2. + Leo Vince ZX
3. + Malossi 70cc and ECU

Surprisingly the difference isn't large between the 70cc with pipe, and just
the pipe.

I've been reading rave reviews about the Technigas RSII pipe. I also read
good things about the Leo pipe, but with a 70cc its causing some choking
issues.

There should be no warning light issues with the Malossi 70cc. Where are you reading this from tifofscooter?

Well, here is my revised list of parts for this year;
-Polini Fuel Pressure kit
-Technigas RSII pipe
-MHR VL13
-Polini Super Speed 9 vario kit with belt springs and wieghts
-Polini rear torque driver

Next order down the road will be;
-70 Malossi kit with ECu
-Delta clutch
-15/41 upgears
Good intensions, poor results.


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