The quality isn't great.. But to me it sounds like it might be valves, I rebuild engines alot, and I have had them pop like that before and it was the valves, true a carb could make it run bad, but most likely wouldn't make it pop, so I would check the valve adjustment, or they might be bent, or the timing might be off,
@CRFrider89 ive got a brand new kfx450r, 2009 arctic cat F1000 sno pro, and a 2008 kawasaki brute force 650. and im still shopping. go waste some one elses time
ummmmmm thats a carb problem more than likely its the jetting and honestly the carb is probably just dirty even though u say u cleaned the carb there is stuff u cant see in it even though u cleaned it it seems like theres a jet clogged
ok ,... well this could be only a couple of things. I've run into the same problems before and it too k me a long time to figure it out. I know you said you checked the Carbs so I guess that rules that out,.. however it is good to check again. The fuel I'm assuming is good fresh (avoid ethenol). Check your in-line fuel filter (if equipted). Also check the gasket that seals the carb to the block. Leakage in this area will cause this problem. Finally, CHECK THE IGNITION, JUST CAUSE IT.....
my son has the same one i bought it for him a couple years ago ..yours has the same problems as mine from i can tell and i hear u've cleaned the carb a bunch of times but its gotta be the carb..i bought an after market carb for mine and now it runs like new
cant really think of anything else, but since you've done everything else. take the pipe out and try it. let me know if it works. i think i just blew the valves on my xr. its a 98, and burnin alot of oil. i thought it eas just from bieng tipped, but it wont stop.
@rangerRZR1 ive gone through everything and it all looks good, but i think its the carb, so i went all out and ordered an 88 big bore kit with the cam, carb, intake and the whole kit and kabootle. and if your bike doesnt stop smoking then its your rings, my buddies drz110 took on water one day and it needed a new top end. it doesnt take much sometimes.
@Tiddler19 hey i have an 03 xr 70 i got the carb cleaned out and now it runs better than new u have to do that trust me i now the thats the problem and also change the sparkplug and check out my vids theyll show u how to make ur bike last longer
@Tiddler19 i did end up gettin a new piston and ring kit and all that. so it runs. hmm. you said its a big bore kit? it seems like its got the wrong carb. dont get it. did you ever think about buying a new or used carb. maby the previous owner switched it with somthing
I've seen pictures on a motorcycle forum where bikes who haven't been used for a couple of years had rust inside the cylinder, that could cause any brown smoke? But the xr is from '00 so it shouldn't be rusted?
Since the rpm's are weird, i would think of a carburation problem. But you've cleaned the carb out completely, you said. You also tested the float valve and the right size jet? Also, your air- and idle screw have the right setting?
I once forgot the spacer between the crankshaftbearing and crankshaft oil seal which made my dirtbike run really poorly.
Anyhow, i'm only experienced with 100cc 2stokes, so don't know much about 4strokes. You are sure that the valves(and valveseals) are okay? greets
dumb assss new carb
mike74341 3 months ago
The quality isn't great.. But to me it sounds like it might be valves, I rebuild engines alot, and I have had them pop like that before and it was the valves, true a carb could make it run bad, but most likely wouldn't make it pop, so I would check the valve adjustment, or they might be bent, or the timing might be off,
axlesteel12 7 months ago
@Tiddler19 clean your carb
CASn1p3r 8 months ago
Tiddler, you probes made all that up, go suck a dick
CRFrider89 8 months ago
I have the same problem.
bassplayerbj 10 months ago
Your killswitch is on backwards dumbass, NOW THERES YA PROBLEM!!!
CRFrider89 10 months ago
@CRFrider89 you and 50 other retards have no idea, the old carb had a warped pilot jet. the things is long gone aswell. now whos the dumbass?
Tiddler19 10 months ago 2
@Tiddler19 Ummm your the dumbass cuz you bought a 70cc dirtbike and you care so much about the pile of shit, get a real dirtbike bitch.
CRFrider89 10 months ago
@CRFrider89 ive got a brand new kfx450r, 2009 arctic cat F1000 sno pro, and a 2008 kawasaki brute force 650. and im still shopping. go waste some one elses time
Tiddler19 10 months ago
were do you live because ill trade you a xbox 360 with 2 wireless controller one white and 1 black
nathanb3100 10 months ago
lol he said ar pm
efedude77 1 year ago
is it cold out?
justinchaffin1013 1 year ago
ummmmmm thats a carb problem more than likely its the jetting and honestly the carb is probably just dirty even though u say u cleaned the carb there is stuff u cant see in it even though u cleaned it it seems like theres a jet clogged
killswitch6988 1 year ago
@killswitch6988 he said he tried different jets too tho
rangerRZR1 1 year ago
Comment removed
justinchaffin1013 1 year ago
your air adjustment could be wrong or your main jets or stoped up or valves need adjusted
DeerSlayer4100 1 year ago
ok ,... well this could be only a couple of things. I've run into the same problems before and it too k me a long time to figure it out. I know you said you checked the Carbs so I guess that rules that out,.. however it is good to check again. The fuel I'm assuming is good fresh (avoid ethenol). Check your in-line fuel filter (if equipted). Also check the gasket that seals the carb to the block. Leakage in this area will cause this problem. Finally, CHECK THE IGNITION, JUST CAUSE IT.....
MountainMan5516 1 year ago
would you sell it for 350 ? just asking
MegaBmx3 1 year ago
my son has the same one i bought it for him a couple years ago ..yours has the same problems as mine from i can tell and i hear u've cleaned the carb a bunch of times but its gotta be the carb..i bought an after market carb for mine and now it runs like new
NRFootball2009 1 year ago
thats a fuel problem dude
carby shop it
trevchad 1 year ago
cant really think of anything else, but since you've done everything else. take the pipe out and try it. let me know if it works. i think i just blew the valves on my xr. its a 98, and burnin alot of oil. i thought it eas just from bieng tipped, but it wont stop.
rangerRZR1 1 year ago
@rangerRZR1 ive gone through everything and it all looks good, but i think its the carb, so i went all out and ordered an 88 big bore kit with the cam, carb, intake and the whole kit and kabootle. and if your bike doesnt stop smoking then its your rings, my buddies drz110 took on water one day and it needed a new top end. it doesnt take much sometimes.
Tiddler19 1 year ago
@Tiddler19 hey i have an 03 xr 70 i got the carb cleaned out and now it runs better than new u have to do that trust me i now the thats the problem and also change the sparkplug and check out my vids theyll show u how to make ur bike last longer
dirtbikerzforlife1 1 year ago
@Tiddler19 i did end up gettin a new piston and ring kit and all that. so it runs. hmm. you said its a big bore kit? it seems like its got the wrong carb. dont get it. did you ever think about buying a new or used carb. maby the previous owner switched it with somthing
rangerRZR1 1 year ago
I've seen pictures on a motorcycle forum where bikes who haven't been used for a couple of years had rust inside the cylinder, that could cause any brown smoke? But the xr is from '00 so it shouldn't be rusted?
Hope you find the problem ;-)
Hunleas 1 year ago
Since the rpm's are weird, i would think of a carburation problem. But you've cleaned the carb out completely, you said. You also tested the float valve and the right size jet? Also, your air- and idle screw have the right setting?
I once forgot the spacer between the crankshaftbearing and crankshaft oil seal which made my dirtbike run really poorly.
Anyhow, i'm only experienced with 100cc 2stokes, so don't know much about 4strokes. You are sure that the valves(and valveseals) are okay? greets
Hunleas 1 year ago