Aprilia rs 125 2007 jets?

gedi1305 · Two Stroke Sniffer Joined: 25 Sep 2011 Karma :

Hello
I own a 2007 aprilia rs 125.
I have a arrow exhaust fitted at the moment but my jetting is way too low so until i get some bigger jes i am going to fit the standard exhaust on
So i was just wondering what jet size it is for a standard exhaust, 28mm standard car, standard airbox and a pipercross panel airfilter
Thanks

jamesrs250 · Nova Slayer Joined: 30 Oct 2010 Karma :

125 main jet is stanard...full power i have seen 155 main jet and 140..i had 125 main jet on full power

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

This is a late bike with the vhst carb which uses a FAR bigger main jet.

Derestricted it should be a 185 (according to Aprilia). If derestricted and withany other changes then start a bit higher than that and work down

All the best

Keith
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Musketeer · World Chat Champion Joined: 27 Jun 2011 Karma :

New shape RS125 usually had VHST28 carb which had quite big main jet (170) for full power bike. I imagine with Arrow and more efficient air filter you would have to make it about 175, but only dyno can really tell.
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Current Bike: Yamaha XSR900 Previous bikes: Honda CBR1000RR Fireblade, Kawasaki ZX-6R Ninja, Aprilia RS125 2-stroke