300rman
03-17-2008, 11:33 PM
well, i bought a 38mm keihin carb off ebay. it came off a cr500, its been running great, starts right up, and seems to run great. plug color is a good tan/brown.
think is, i havent touched the jetting on this thing. got it, put it on thinking i would need to lean it out, and it ran great.
only thing is, when i first start it, it will not rev past half throttle. even after it runs awhile, it will not. i have to hammer it a few times to get it past that halfway point, and after it raps out a few times, it is perfectly fine and wont do it any more. but it will not get past this "halfway point" unless i hammer the throttle a few times.
when it does this, it doesnt smoke excessively like its too rich or anyhing
it just revs up to its halfway point, and wont rev past this, just kinda stays at that rpm, might sputter a bit, and then stay at the same rpm still. i dont really know how to describe it.
maybe like a funny "hollow" bog-sound when it hits its halfway point.
when i tore the motor apart to go get ported, it had about....10 hours on the top end. the cylinder had some vertical lines in it, but were not deep or anything, just some light scuffing, if you want to call it that.
is that normal? i have heard people tearing their motors down after a few months and the cylinder being in great shape.
can we define "great shape'. i am trying to figure out if she's running right.
the plug is a good color, but i mention in my other post that maybe a rich premix could cause a false plug reading? i have no clue, and want to make sure it gets back together right this time and that it will run great for years.
think is, i havent touched the jetting on this thing. got it, put it on thinking i would need to lean it out, and it ran great.
only thing is, when i first start it, it will not rev past half throttle. even after it runs awhile, it will not. i have to hammer it a few times to get it past that halfway point, and after it raps out a few times, it is perfectly fine and wont do it any more. but it will not get past this "halfway point" unless i hammer the throttle a few times.
when it does this, it doesnt smoke excessively like its too rich or anyhing
it just revs up to its halfway point, and wont rev past this, just kinda stays at that rpm, might sputter a bit, and then stay at the same rpm still. i dont really know how to describe it.
maybe like a funny "hollow" bog-sound when it hits its halfway point.
when i tore the motor apart to go get ported, it had about....10 hours on the top end. the cylinder had some vertical lines in it, but were not deep or anything, just some light scuffing, if you want to call it that.
is that normal? i have heard people tearing their motors down after a few months and the cylinder being in great shape.
can we define "great shape'. i am trying to figure out if she's running right.
the plug is a good color, but i mention in my other post that maybe a rich premix could cause a false plug reading? i have no clue, and want to make sure it gets back together right this time and that it will run great for years.