PDA

View Full Version : New 416 wont idle???


Glamis400ex
06-17-2003, 04:08 PM
Well, it runs, but wont idle for nothin. I turned up the screw and she still died..:huh

I went up 2 sizes on the main to a 170 and pilot is a #40.

Any one else have this prob? Its probably a carb issue and nothing more...


Glamis
lilpoppy
06-17-2003, 04:12 PM
My friend had the exact same problem. I'm not sure how he fixed it but it had something to do with the carb. I will ask him and see if he can help you out. Did you by any chance put in a new cam where you removed the decompressor like a hotcam? I'm not sure but I have heard that that can have an effect like that too.
anywhereEx
06-17-2003, 04:15 PM
I had to clean out my carb and go to a 42 pilot when I put my 416 kit in. It idled good after that.
06-17-2003, 04:17 PM
ya go up a pilot jet and clean it up real good and it will work for sure
Glamis400ex
06-17-2003, 04:22 PM
thanks guys, I'll try that. It sounded real strong...:D Yes, I did install a new hotcam.

anyone else??

Glamis
dariusld
06-17-2003, 04:33 PM
Still breaking in mine. Put the new cam in(hotcam 2) new piston and left the jetting as before the rebuild(probably a little rich before). Starts easier than before. Idles fine without doing anything. It doesn't have as much oooompf as before, but much faster. I know I wasn't any help.
Bad Habit
06-17-2003, 04:49 PM
Glamis

You've got the same jetting I had in mine when I built mine up. I never had a problem with the idle so my guess would be a chunk of something in the carb.

BTW, I eventually went to a 39FCR carb. I'll just say WOW. Made a 2-3 bike length difference over 300ft in the sand. And, I never had to touch the jetting in it. Got it from Sparks and just bolted it on. It was set up as if they had installed it and fine tuned it on the bike themselves.
Cannonball08
06-19-2003, 05:04 AM
My 416 won't Idle either!
UglyMotha™
06-19-2003, 05:12 AM
did you guys change your cams, mine idled fine until i put the hot cam in it then it wouldn't idle sounded like a sputtering harley but all i did was bump the idle screw up some and it was fine
Glamis400ex
06-19-2003, 04:56 PM
cleaned her out, and installed a #42 pilot....still no idle...:(

Glamis
dariusld
06-20-2003, 12:38 AM
I don't know nothing , but have you double checked your timing marks? Just a thought.
RAPTORAZ
06-20-2003, 01:16 AM
I've had a 45 pilot in mine since before I did my Stage 2 and 416 piston. However after my cam and piston swap, I actually had to lean my idle mixture out. It wanted less fuel after the swap. :confused:
Glamis400ex
06-20-2003, 01:25 AM
RAPTORAZ,

I belive Im at a 2 and 1/2 turns out...per Dynojet recommendations. I'll try that next. Do I want to twist in or out?

Glamis
RAPTORAZ
06-20-2003, 03:33 AM
In
Glamis400ex
06-20-2003, 04:07 PM
Timing marks are right on...good call tho dude..

Glamis
Bill Fuller
06-20-2003, 04:37 PM
Check the intake boot.The 99's had a 2 piece (aluminium&rubber)intake that is prone to leak.The replacement is a solid black intake.I had a 99 also it had a 426 kit it eventually got to where it would not idle at all even if you worked the throttle it would hic up and sometimes die,we found the problem by taking the plastic off of a 01 and the 99 to see if we were missing anything.
Glamis400ex
06-20-2003, 04:47 PM
Bill Fuller,
I never had 1 prob with the idle, or the intake boot for that matter, untill I built the 416. I'm thinking it may be the idle screw.

Glamis
Glamis400ex
06-20-2003, 05:12 PM
wait a sec...now that I think about it, I DID have some porting done and needed to remove that piece. HMMM:confused:

Where would it be prone to leaking? Where the rubber meets aluminum?

Glamis
Glamis400ex
06-20-2003, 05:46 PM
I checked the intake boot, all is well. I turned the air screw in 1/2 turn, it was at 3 1/2 out, now it's at 3 turns out and now it will idle...but JUST barely, and that is with the idle screw all the way up.

It seems like the air screw did the trick, should I do another 1/4 or 1/2 turn in? Will that mess anything up?

Thanks to all who posted on this.

Glamis
RAPTORAZ
06-21-2003, 01:19 AM
I would keep turning the screw in until the it starts to lean miss and then back it out 1/4 turn.
Glamis400ex
06-21-2003, 02:21 AM
RaptorAZ,

I dont' know what a lean miss is??

Glamis
Bill Fuller
06-21-2003, 02:52 AM
Originally posted by Glamis400ex
wait a sec...now that I think about it, I DID have some porting done and needed to remove that piece. HMMM:confused:

Where would it be prone to leaking? Where the rubber meets aluminum?

Glamis Yes,the seal seperates from the heat and constant vibration.If it's not leaking now I would look into buying one from Service Honda it's only 25 bucks or so.It sounds more like a jetting problem if you are having to move the air/fuel mixture screw that much.
Bill Fuller
06-21-2003, 02:53 AM
Oh yea,what piece are you talking about having to remove?
Glamis400ex
06-21-2003, 09:43 AM
I removed that intake boot, because I had some intake clean up porting done. It is half rubber...half aluminum.

Glamis
RAPTORAZ
06-21-2003, 10:37 AM
Originally posted by Glamis400ex
RaptorAZ,

I dont' know what a lean miss is??

Glamis

A lean miss occurs when there is not enough fuel for the amount of air volume coming in. Basically turn the screw in until it starts to stutter and then back it back out until the idle smooths out. If you are currently too rich now, the idle will start smoothing out and coming up, until you get too lean. Then it will start to miss. Make sure you do this when the engine is warm. Since EX's are notoriously cold-blooded.
Glamis400ex
06-21-2003, 10:53 AM
well, it's now at 2 and 1/2 turns out on air screw, and #42 pilot. Idle screw is all the way up (as fast as it will idle). She will idle real good for 5 seconds, real fast....then slowly peter out and eventually die.

Im getting bummed here...

:(

Glamis
RIjon
06-21-2003, 11:25 AM
If your idle screw it ALL the way out.... something else is wrong:eek2:

Check for Vac leaks
Glamis400ex
06-21-2003, 11:43 AM
If your idle screw it ALL the way out.... something else is wrong

Yes, the idle screw is turned all the way to the right(this would make a REALLY fast idle, if it was working properly)....not the air/fuel screw. If there was a leak, wouldnt it lean pop like the other guy said??

Where do I look for leaks?

Glamis
Glamis400ex
06-21-2003, 02:50 PM
ugh...:( I put the #40 back in and set the air screw at 2 turns out. When I start it, it idles real fast for10 seconds then slowly lowers till it sounds like a sputtering Harley.

I really need a FCR:huh

Glamis
Bill Fuller
06-22-2003, 03:02 AM
If you can't get this one right then an FCR isn't going to make it any easier.If the air srew is all the way out (more than 2 & 1/2 turns than you need a larger piolet jet.
cals400ex
06-22-2003, 04:29 AM
your throttle cable isn't sticking or anything is it?
Glamis400ex
06-22-2003, 04:40 AM
nope
RAPTORAZ
06-22-2003, 04:56 AM
Originally posted by Glamis400ex
ugh...:( I put the #40 back in and set the air screw at 2 turns out. When I start it, it idles real fast for10 seconds then slowly lowers till it sounds like a sputtering Harley.

I really need a FCR:huh

Glamis

Mine also did that at first. It stopped doing that after the first ride. Been idling fine ever since.
cals400ex
11-25-2003, 12:31 PM
glamis, did you ever find your problem??? i am having some problems here too.
CC Rider
11-25-2003, 08:37 PM
Ok mine did the same thing and I finally relized that for some reason,still not sure why but the spring on the idle adjustment was "bottoming out " , basically the idle screw wasnt able to push the throttle enough to even effect the engines rpm`s. What I did to fix this problem was just cut like one ring off the idle spring and that did it. hope this can help some one!
pnut420
11-25-2003, 09:00 PM
Originally posted by CC Rider
Ok mine did the same thing and I finally relized that for some reason,still not sure why but the spring on the idle adjustment was "bottoming out " , basically the idle screw wasnt able to push the throttle enough to even effect the engines rpm`s. What I did to fix this problem was just cut like one ring off the idle spring and that did it. hope this can help some one!

Sounds like you oakie rigged it :p
toby400ex
11-26-2003, 12:10 PM
If it is still having the pronblem check the spark plug gap, somehow i smashed mine before i put the plug in and didnt notice, it would do fine above quarter throttle but sputtered really bad below 1/4 throttle, and wouldnt idle well even with the idle all the way up.
Aceman
11-26-2003, 11:28 PM
I don't have a 400 so I don't know if this will help, but I will give it a go. Seeing how you have cleaned your carb and changed your jetting around quite a bit I can't understand how you cant at least get it to idle halfway decent. It sounds like your getting fuel for it to idle but then it runs out of fuel. Have you checked your tank to make sure nothing is plugging your fuel line restricting flow? It sure sounds like your fuel line is restricted. It seems like your running the fuel out of the bowl then your quad cuts out. Then when the fuel slowly fills the bowl back up your quad starts until it cuts out again from lack of fuel. Is your float adjusted?
drummer-on-a-EX
11-27-2003, 03:54 AM
Glamis,
When I first did my 426 I had a very similar problem, it turned out to be my cam timing.
Don't just line up the marks on your sprocket/head, first make sure your cam is in line with your sprocket (hope that makes sense), after I oblonged the holes in the timing gear my idle problem went away and I gained 10# on the comp. gauge.
BTW I only moved it about 1/8"
Good luck,
Drummer