Friday 20 April 2012

Aprilia RS 125 carb jetting jets 28mm 34mm RS125



















A simple equation for figuring you main jet is to multiply dia of carb by 5 and then multiply buy 0.85 for stock 0.9 for bike with sports airfilter fitted 0.95 for airfilter and exhaust .

28 x 5 x any of 0.85 - 0.90 - 0.95



Aprilia rs125 carb jetting 34mm and 28mm

Aprilia RS 125 carb jetting jets  28mm 34mm RS125


Aprilia rs125 28mm carb on Ebay UK here



Aprilia RS 125 carb jetting jets  28mm 34mm RS125



Aprilia rs125 carb jets on Ebay Uk here


                                                                                                                                                                            Dellorto PHBH28BD standard 
you do not need to re-jet for derestriction but its always advisable after any change to do a plug chop test  to test combustion conditions , this will give a clear indication of the jetting and running condition inside the cylinder , also its recommended to increase jets size 5 points for any sports airfilter or exhaust fitted and again do the plug chop test to ensure correct running conditions this is a good habit to get into after doing any work on your bike that may after fuelling .

starter jet 70 
main jet 120
pilot jet 62
slide needle valve bn266
float needle valve 250 





Aprilia RS 125 carb jetting jets  28mm 34mm RS125



Aprilia RS 125 carb jetting jets  28mm 34mm RS125




1. choke jet 
2. main jet 

3. float
4. atomiser 
5. idle tube / pilot jet < same thing
7. needle valve and seat 
8.main jet anti surge washer
air fuel is the angled screw towards the air box and is a air screw (not the one with the spring on thats the idle screw) 
out =more air to fuel
in = less air to fuel
float height set at 14mm dellorto suggest 11 mm i ran 14mm tho 






155 main 
36 idle jet 
1.5 turns out on the air screw 
60 choke jet 
k57 needle top notch 
app 266 needle jet / atomiser 

Aprilia rs125 34mm carb strip down video



                                            




The purpose of the carburettor is to provide your engine with the correct ratio of fuel and air. Although the carburettor can’t provide the ideal mixture at all loads, the different parts of the carburettor work to try and create this ideal mixture for proper combustion.




Aprilia RS 125 carb jetting jets  28mm 34mm RS125


Aprilia rs125 28mm carb see them for sale on Ebay UK  

Aprilia RS 125 carb jetting jets  28mm 34mm RS125







 



You could just dump it all in your ultrasonic cleaner , get one they are excellent 

 

Aprilia RS 125 carb jetting jets  28mm 34mm RS125







see more Aprilia RS 125 posts here 






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