mx 125 jetting

[Jack-Mx125]

hi im new to this site
ive just bought a gianelli pipe for my mx 125 needs a bigger jet does anyone no anywhere i can buy them from?any help would be great thanks

[sumpgard]

why does it need a bigger jet have you checked the colour of your plug if its white raise the needle to give it more fuel this will richen the mixture you will only need a bigger jet when you run out of ajustment.

[stevo as b4]

I guess from any bike dealer or parts shop that sells Dellorto carbs and spares!

If you have an aftermarket pipe, then the pipe's manufacturer should be able to advise on the approximate jetting changes required, and in which direction if they are needed. If they can't then they will either tell you that it will not need any re-jetting work being one possibility, or else they have not tested the pipe properly on an actual bike, in which case you should send it straight back asking for a full refund.

[asdf]

Jets are available from here

https://www.pjme.co.uk/acatalog/Aprilia_RS125_Air_Filter__Fuel__Carburre.html

If you have the 28mm carb (standard) the main jet will be 120 (standard) so if i was you i would do a plug chop to make sure its not running fine before you buy jets. If it is a bit lean buy a few jets say 124,126,130 as all setups will need different jets.
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KTM EXC 125 Supermoto, Honda Cub90

Past - Aprilia SR 50 Ditech, Derbi Senda SM DRD, Aprilia RS125 x 2, Aprilia RX 125

[Jack-Mx125]

nope tryied a 125 an a 130 hasnt made any differance :s im confused. thanks for your help anyway.

[Charlie]

Have you done a plug chop?

The general rule of thumb is, if you change the exhaust for a non standard, change the jet by 10%

But do the plug chop first.
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Past: Honda x8rs, Honda City fly, Honda Hornet 250, Honda VFR750, Yamaha xt600e.
Current: Honda CBR929RR & Yamaha XT660Z Tenere

[Jack-Mx125]