decat 2007 rs125 11kw

[jasepugh1984]

Hi just wondering if i was to decat the pipe on my aprilia rs125 2007 11kw, would the main jet size be the same as the pre2003 rs125s and if so what is the main jet size in the older rs125s.As far as im aware i think the main jet in my bike is 132 as to compensate for the cat in the pipe.Also would just changing the pipe have much of a performance increase.Would just buying a carb from a pre2003 rs125 be an option instead of fiddling with my bikes carb setup,cos then if it goes wrong i can just whack my original carb straight back in.any help is appreciated,thanks.jason

[jasepugh1984]

My Rs125 2007 Unmodified yet....

[G]

Why do you want to take the cat out? Does it fully derestrict the bike?
If not, seems a waste of time - just derestrict it properly if you want more power.
I don't know about on the RS, but on some KTM 2 strokes you have to cut out the 'cat' section and reweld in new bits if you want to use the original pipe.

[BenR]

Just get an exhaust off of an older RS. As far as I'm aware they only started having cats in them from 2005. There's a pretty comprehensive guide on derestricting your RS here-> https://www.125ccsportsbikes.com/forums/index.php?showtopic=31334
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Current bikes: suzuki RG125UN wolf. Yamaha MT-07