I've Added a pic to my page.
I feel the improvement in power but should I change the air filter to have a real change?
Please advise

 

Do a K&N and jet it. You should fell a good gain in power.

 

Looks good!! after your stocker gets dirty change it to one you can clean. the stock air cleaner flows good but not washable. I would go to a 172.5 main and lower the clip on the needle.
Sam

 

Thanks guys for your help

Sam,
do you mean I need to replace the main jet or just tuning is required?
Is there any guide of how to do that?

Thanks again

 

Hey, Ok I don't where to get the modded ended cap does anyone know? and also where to get the side panel thing on the side of the exhaust where its like silver and says ds
thanx

 

that panel on the exhaust is on the baja and x models. you would probably be better off finding a used baja pipe on ebay or something. his moded endcap is homemade. but, hpresearch.net and modquad (at on dunes) make billet endcaps for the ds.