'01 CR 125 Engines Mods??

that bike cant bore very much do to the exhaust port thickness. eric gorr tried many things for that back when it was newer and I also rode one, sorry to say its just slow. if you want my specs let me know. i wouldnt waste money on major engine mods on a 125 for dune riding cause they aint made for it. keep it stock and you wont have engine probs like a mod would. but thats me. you wont gain much power with all the money you would spend on it.

my best setup for that bike, and i rode it in open b class against big bores and did well, was. cant remember the smaller needle in 3 spot. dosent matter what jets cause we are at different altitudes, but boyenson pro reeds , pc pipe and reg silencer. and that was it. nothing else mattered. i thought the reed spacer was ok but i was getting low end bogs and removed it. dont waste your money. i never had one prob with that bike and i ride mega sand all the time. air filters are your friend keep them clean and youre ok. i use maxima fft oil on the filter. i also rebuild every 4 to 5 races on 125s. unless you like total rebuilds do it this way. also jet a bit on the rich side for sand.

you will have little to no increase by going 80 over,and you shouldent because thats boring the cylinder to its limits and if you get a scratch u cant rehone it u must buy a new cylinder......just my 1 dollar of advicee