[confusedtech]

I have searched and dont see what I am looking for.How do you check or set the timing for the accelerator pump? That may not be the problem. The bike will stall if you just touch the throttle but revs pretty good if you turn it quiet a bit. I didn't notice this before I did the o-ring mod. I dont know if any other carb mods have been done before I bought it other than an air screw. I know it has had a big bore kit done by a reputable shop locally.
thanks oneconfusedtech

[TDW]

~, are you there yet?

[TDW]

I think I saw a link somewhere? about how to check and adjust AP link screw but cant remember. Check out this web address it gives some good info about leak jet differences. www.youtube.com/profile?user=sfbayarea

[kulhand]

After opening the airbox, putting in the JD kit and the o-ring on the AP, I had a similiar problem with my 450X. The solution for me was going to a larger leak jet. Stock was a 70, I went to a 50. Cleared it right up.

[confusedtech]

I think I have decided I have more trouble than I thought. I have noticed a noise that I thought was an exhuast leak, but it seems to be coming from the air cleaner. I removed the valve cover and the clearance is correct on all valves. Could it be a weak or broken spring or maybe a partialy burnt intake valve? The engine runs and sounds good above a fast idle but does seem to be a little rough at idle. The noise is there until you get over maybe 1800-2000rpm.

[TDW]

So before you did the AP mod the bike didnt have a bog when you touched the throttle? After doing the AP mod you now notice more or other problems? Is that correct?

[confusedtech]

I'm not really sure. My son crashed and bent the bars and the muffler right where the mid pipe goes in the canister. I staightened the pipe(Actually the front of the canister) and installed new bars and clamps. I removed the rear shock to service it while I was working on it and did the o-ring mod while there. So I am not sure if that was when it started or something else caused it.I started noticing a noise coming from the air filter(thought it was exhuast leak) sounds like exhuast popping in the intake only at idle. I checked the valve clearance and it is correct. I also put air pressure in the cylinder and no air comes out the intake or exhuast so I dont think I have valve problems. Cam timing is right on the marks too. Could it be the ignition module advancing the timing too much at idle? I installed new throttle cables and housing when replacing the bars. Also noticed that alot of air gets into the crankcase when putting it in the cylinder(gurgles the oil), that may be normal for this engine(not used to 4 stroke bikes)

[TDW]

Im getting alittle confused also, if the muffler or pipe isnt sealing and there is an exh leak obviously there probably would be a different or an unsual noise, and could cause the bike to run different as well. Has the bike been ridden since the crash or are you still in the process of making repairs?

[confusedtech]

There is no exhuast leak,the canister right at the pipe got bent so the canister was rubbing the tire. I pryed it back very easily. The noise is coming from the intake, I took the air filter off and listened up in the back of the carb with a hose. The noise sounds just like an intake valve is open when the plug fires,but everything I have checked is fine.I swapped the muffler just to make sure it wasn't creating too much backpressure,but the noise is still there. I have ordered a servicle manual from Honda to see if there is any ignition system diagnosis I can run.Once you get the rpms up around 2000 or higher I dont hear the noise anymore,not sure if it goes away or the engine(Exhaust) noise just drowns it out.

[TDW]

Have you ridden the bike since the crash or after making some exh repairs, does it have an eng miss, is it noticeably down on power? When you aired the cyl did you have a leak down gauge hooked up, or just trying to see if there was an air leak thru the valves? I think its a long shot that the noise is caused by ignition module problem. How does the plug look?

[TDW]

what bike is it 250, 450 R or X?

[confusedtech]

04 crf250r Yes I have ridden it and my son has been riding it .It runs good over a fast idle, has a pretty bad bog at idle,will stall when just starting to turn the throttle(occasionally).The plug is kind of grey looking not rich or lean(comparing to 2stroke plug looks) I was just putting a little air pressure in plug hole to check for valve sealing.Have not tried a new plug because it starts so easy.

[TDW]

Thinking that if you have some detonation going on that could be causing the noise, and the bog, a lean condition. Should probably find out what jets are installed and go from there. What do you think? Did the bike always run like this or did it run good before the crash?

[confusedtech]

I dont remember the engine sounding that way before and my son doesn't either.The bike did run very good before thats why he crashed he was jumping some doubles that he used to have to single on his yz125(too close to a corner) I have pulled the jets it has a 45 pilot and a 180 main. I tried a 185 main and it sputters really bad on hard acceleration so I went with a 178 main and put in a 42 pilot and it runs pretty good with that.I have about decided to just let him ride until something breaks then find the cause.

[TDW]

I was suprised to hear that it seems to run better when you jetted it leaner, I thought the slow jet may have been causing it too run too lean. It would be nice if you could get a accurate leak down reading to be able to determine how well the cylinder is sealed. Sure would like to know what's causing the problem!