I'm sorry for my inactivity... Thanks, everyone for helping me out! I opened the power valve and removed the rubber tube that is on top of the airbox. Now the bike gets much more air and breathes as it should, it goes like a beast. THANKS, EVERYONE!!
@Calum I'll take a picture of the head I've got, it's stamped 3MB but it's the one with the ridged, I'll have a look at the book cheers
I planned on skimming the deck down at the end to create slightly higher compression than standard ideally
@Glynn123 yeah but I’ve heard loads over the years about what you have to do to push the bikes without getting it impounded but the problem is practices change from one police branch to another and my specific police impound no matter what they essentially do what they want all of the main criminals and such have the police payed off so there’s no way I’d chance a near 2 grand bike)
the 2003 was easy to derestrict the standard 3rm-20 cdi I actually found very good. Restrictions were the standard exhaust and the reed switch in the back of the speedometer. They came with the powervalve from factory unlike some other years which I can't believe they did fit servos! Back when mine was 125cc it would destroy an 1990 DTR
Oh dear, back on topic anyhow....Let us know how you get on with the PV. If it still struggling then it would sound like it's still restricted and needs sorting ASAP! 2003 models were the WORST for restrictions!