Hi all, I'm new to the forum (hello) and am just about to collect a new CRF 250L in Thailand. I,ve done a fair of searching but have been finding some contradicting info out their and some dated too, so sorry if i'm asking the same old question over again. I plan to use on and off road so am looking to mean down a little but not too much, probably a 42 rear, i'm not bothered about the error with the speedo but i am not too keen with the miles / KM reading being far more than the actual and would like to know if their is a cheap fix for this? not looking to spend on the plug in bit as i'm now skint after buying out right. Also i would like to get a bit more out the motor but again can;t spend too much so was planning to remove the air filter /back fire mesh and maybe drill a few more small holes in the top of the air box. Will disconnecting the O2 sensor help to keep the motor running a little cooler on low to mid rage with a fraction more juice? or is it best to just leave it? I'm planing to fir a EJK jet kit at a later stage but not for a few months yet. Are their any mods that can be done to the exhaust system to free up the gas and save some weight, i'm under the impression that they don;t have a spark arrester here in Thailand. Weight saving is higher up my list than all out power. Any tips will be most welcome :-) Many thanks Damian.