Vespa Carb Set-ups.....

Check here for a list of various carb set-ups to help with jetting and all aspects of carb trickery!
onelonguk
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Sun Jul 17, 2011 4:39 pm

can anyone help 172 t5 mixtire screw 4.5 turns out to eliminate bog got 50/100 pilot jet in main 124 pm pipe 4.5 turns seems excessive but scoot picks up clean when reved oil seals have all been changed

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cezeta
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Sun Jul 17, 2011 5:00 pm

onelonguk wrote:hi can anyone give me timming and rough jetting for 172 mallossi runing standard carb no porting etc and no autolube exhaust will be pm going to strop and do bearings and seals

122 main for a sito+ or simonini or 125 for the pm pipe, i would start higher though and come down to 125. best to black a plug than break the engine.

all other jets standard.

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rapido230
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Main scooter: vespa 210 & lambretta gp
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Wed Jul 11, 2012 12:40 pm

Scooter: PX200
Engine: malossi 210 (reworked), full reed tune, MB reed block with Boyesen dual stage reeds
HEAD: mmw 11.5-1 compression 1.2 squish
Reinforced clutch with xxl springs
PIPE: scorpion
CARB: PHBH 30
main jet 135
Atomiser: av264
Needle: X7 - Clip 1.5
55 pilot
Slide 40
Ram Air filter
CRANK: worb 5 cut crank
GEARING: Standard + 4th T5
IGNITION : 17°
2Kg flywheel
Dyno'd 22.5 HP
Torque 19.7

ducksta
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Mon Apr 22, 2013 9:53 pm

vespa t5
polini barral chislespeed tuned
suzuki ts185 piston
packing plate
cosa 21 tooth clutch
revolver exhaust
plug b9es
head profiled by chislespeed
24mm si carb drilled, sat on top of a drt reed valve
polini bellmouth
polini foam filter on carb box
sip fast flow tap
drt float bowl
main 132
atomiser be4
pilot 50/100
max power 14.74
max torque 12.46
live life your a long time dead

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cezeta
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Mon Apr 22, 2013 10:04 pm

onelonguk wrote:hi can anyone give me timming and rough jetting for 172 mallossi runing standard carb no porting etc and no autolube exhaust will be pm going to strop and do bearings and seals
t5, 172 mallossi, standard carb, autolube, taffy pipe standard jetting apart from 122 main jet

flat out at 70mph at 8000 rpm

cit205
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Tue Apr 23, 2013 8:30 am

onelonguk wrote:hi can anyone give me timming and rough jetting for 172 mallossi runing standard carb no porting etc and no autolube exhaust will be pm going to strop and do bearings and seals
Leave the timing as standard - but it would be good to strobe it as the standard marks are not necessarily that accurate . A tuner mate found the 17 deg IT mark on a px was more like 20 deg on an engine he did recently.

Bearing in mind no autolube =at least a jet size up than with autolube, and that pipe i would start at about 128 main, you might be able to get it down to 125 ,mine wasn't happy below that with a mickeck but was ok with a sito with a 122.

I can't remember,but is that 50/100 pilot jet standard, and you should only really need the airscrew out max 2.5 turns (out richens)

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Bofs
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Tue Apr 23, 2013 9:30 am

That was 2011 your man was looking for advice :D
Muffspeed....no muff too tuff
Bad Samaritans SC

2007 Gts 250ie
1969 Motovespa Gt160
Vespa Cosa 177
1957 Zundapp Bella 500 Auto

cit205
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Tue Apr 23, 2013 9:51 am

:lol: so he was :oops: someone must have revived the thread , i saw it and posted :?

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Richjak
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Thu Dec 05, 2013 6:27 am

Ported PX 150 engine running a standard Polini 177 kit
28mm PHBH with 42mm air ram
worb 5 flowed and balanced crank
22/64 gear box
Polini RH pipe

Note: SIP recommend 125 -132 main jets and i have got those on order any idea about the rest of the carb set up ??? (atomiser/pilot jets/ slide/nedle position etc)
BOTAK ITU INDAH.

Boreham
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ebay user ID: rsboreham
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Sun Mar 23, 2014 12:37 pm

Vespa Px125, pinasco alloy 177 kit, worb 5 longstroke reed crank, MMW reedvalve, Sip road exhaust, dellorto phbh 28mm

Slide 45
Needle X2
Atomiser AV264
Pilot 55
Main 115

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