Slow Bike Problems

[snowdude2004]

Basically I bought a Motorhispania RX50 and since I've been riding it, it seems as if the choke is permanently one whilst riding as it splutters and limits my revs in the first three gears until it picks up a little. Today I replaced the exhaust with a turbokit one was a bit of a bitch but finally got it in and its got much worse.
Bike constantly splutters until I manage to gain speed on a slight downhill and then it starts sounding smooth temporarily, It's much harder to gain speed now and probably sit at about 20/30 mph if I'm lucky.
I have a feeling my airbox/carb may be dirty and causing this problem due to petrol starvation or something. Anyone have any suggestions as to what it is before I tear off my tank and get to work tomorrow?
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CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[N cee thirty]

[snowdude2004]

So far i've just removed connector to carb so airbox isnt being used and its running much better now, its actually revs fully in all gears....it just sounds pretty loud instead.
Think that's still a jet issue or could airbox be dirty?
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[delvey91]

Try a K and n style cone filter on it, dont run it disonnected from the airbox as it could suck in loads of crap
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2016 Honda Africa Twin
2006 KTM 200 EXC

[herulach]

[snowdude2004]

the airbox exterior didn't seem too bad but this bike had alot of rusted and rounded bolts so I presume this has been sat outside for sometime. Massive pain to get the airbox off of this bike but suppose I shall have to take it off and check the interior so i dont have to pay out much more for parts
____________________
CBT passed: 26/09/09, Theory Passed: 18/08/10, Mod 1 passed: 20/10/10, Mod 2 passed: 26/10/10.
Current Bike: Honda CBR 400 Nc23

[N cee thirty]

well usually taking off the airbox makes the mixture leaner so your bikes running rich if you put the filter back on

you need a bigger jet in,or try a k&n filter
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[herulach]