Got Myself A 2004 Crf250r

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it has a drd exhaust and pro taper bars and new throttle and grips...supposedly has new valves,cam,piston and rings, and valve shims...

well i had it out yesterday and it ran fine and i was pulling wheelies and i rode from 9-12:30 without problems but as the ride went on and after id stop to let it cool down it got harder to start...then me and my friends stopped at this cabin and it wouldnt even try to start...soo i got a ride home and it fired up and idled fine in my garage but if i cruise around or just sit there i cant give it more than a 1/4 throttle because itll bog out and blow gas and air back into the carb and sounds like its starving for fuel...think it could just be timing is out of whack or what? i need some help please...

if its blowing gas and air back into the carb its valve problems, yo have an intake valve sticking, not shimmed correctly, or cupped. unfortunately, you need to pull the valve cover and check the valve lash. i suspect that youll have an intake valve with 0 lash clearance.

I LIKE MY SOHC.

But yeah Jeremy nailed it. Tight intake valve stays open very slightly once everything heats up and expands.

my buddy had the same bike and it needed the valves done like every other ride he never did figure out what was wrong w/ it

probably kept buying oem valves. buy aftermarket stainess 1 piece valves and problem will be solved

i pulled the plugs to check the notches for the timing and its off by a couple millimeters...ill pull the head tho and check all the clearances tho

how about some wiseco titanium intake valves...260$ for 2 of em'

that may not be 100% correct, some aftermarket cams need to be "degree'd, so they wont actually line up perfectly with the notches, and it could still be in correct cam timing. know what i mean?

well i traded it for a worked 2000 kx250 that runs on 110 race fuel...
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some mods are pro circuit pipe and silencer, v-force 3 reeds, uni foam filter, head shaved .20, stock bore with wiseco piston and rings

good trade...way faster than that honda 4 poke....and that green looks sweet as hell to boot

thats a good trade, that will kick that hondas ass

damn nice dude, but people on here said i owned alot of bikes..lol only prob with that 250, its going to be hard affording to ride to pay for fuel.

whats the compression? i had to run a 110/93 octane mix on my blaster. you may be able to get away with less of an octane completely safely. without the psi of the engine..no way to know.

do a compression test, i was told if its over 160 psi then you need atleast 110/93 mix, the compression in my banshee was 178psi so i had to run straight 110 (didnt get that far lmao)

It will also only run half as long.

Nice bike though

hondas live forever if you take care of them.

...thats why it blew up the first day out on it and i was taking it easy on it...lol that kx runs on 98 octane with benol i dont know the compression but its pretty hard to kick

if it is jestted right no matter what the compression is it should kick over fairly easy..my banshee was running 185each cylinder and i barly had to kick it..i could almost start it with my hand..do a pluh chop

its jetted one size rich... i like it where its at...im trying to sell it or trade it for another 250f or banshee

banshee ftw
whats wrong with it??