Weird restriction

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Solis560
Posts: 14
Joined: Thu Aug 21, 2014 7:24 pm

Weird restriction

Post by Solis560 »

Hey guys!

So I bought a '99 ZXR400 restricted to 35kW, the guy I bought it of said he and his mate restricted the bike to 35kW (47bhp) by replacing either the jets or the needles, not sure which.

Ever since I got this bike I find the restriction a bit shady, it starts to huff and puff at around 8000rpm and cuts out at ~10,000rpm.
Since my bike is registered to 25kW on the license plate(?), i.o.w. it says it has 25kW in the database, I want to bring it back to it's original 25kW state. When I bought the bike he from gave me these tubes (see below) which are supposed to go in the carbs (I think) to restrict it to 25kW.

Any idea on what i'm supposed to replace (jets, needles whatever) to bring the carbs back to 'full power' mode so I can restrict them with these tubes?
Also I must mention that the bike has an aftermarket exhaust (BOS :smt020) on it, so I think that might affect the jet size I need to buy.

Cheers!

Image

* Link fixed!

Edit: Just got informed that it is a 25kW import model, so that might affect things too.
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