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Post by ppaauull on Aug 27, 2008 16:07:16 GMT -5
I need to adjust my idle mix screw, i was thinking of slotting it with a dremel, but i'm nervous about removing it.. how did you guys get to it, or screw it back to the "stock" position?
also, which way to turn to richen or lean out the mixture? does is go righty to richen, lefty to lean?
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Post by Firegut on Aug 27, 2008 16:47:25 GMT -5
Backing it out will enrich the mixture. I used a small flat head screw driver to remove it when I replaced it. It took awhile and I wouldn't want to adjust it like that, but once it's out you can add the slot and that'll make it easier to put back in.
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Post by ppaauull on Aug 27, 2008 16:59:37 GMT -5
Backing it out will enrich the mixture. I used a small flat head screw driver to remove it when I replaced it. It took awhile and I wouldn't want to adjust it like that, but once it's out you can add the slot and that'll make it easier to put back in. how do you get it back to the stock postion after you take it out?? i think i just need it to turn 1/8 or 1/4, i'm still in the process of re-jetting, it's still kind of running ehhh... i'm in tigard! we should get a ride going! |
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Post by nobodysdog on Sept 16, 2008 15:24:58 GMT -5
I was wondering about this...
Best to just slot it or is there a screw with a "factory" slot from another carb that would work?
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Post by Firegut on Sept 16, 2008 18:14:44 GMT -5
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Post by killtim on Dec 30, 2008 2:12:44 GMT -5
i have two rucus's and i just cant seem to find the adjustment screw.is it on the carb?Help! running to rich
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Post by Kami no Chiizu on Dec 30, 2008 2:23:46 GMT -5
There's a hole on the underseat board that leads directly to it.
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Post by Dandy Dan on Dec 30, 2008 2:50:03 GMT -5
The hole in the floorboard (under the seat) is for the idle screw but not the idle mix screw. The idle screw (accessed via the floorboard hole) just holds the throttle open a crack. The idle mix screw actually affects the air/fuel ratio.
So why are you running rich? have you modified your Ruckus? Normally you shouldn't need to mess with this. Anyways, the idle mix screw is the left side of the carb (drivers left) and it's near the front. It's a small brass knob that is D shaped. You need a special socket or tool to adjust it unless you are handy with some needlenose pliers or you hacksaw a slit in it to use a flat bladed screwdriver.
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Post by theruck1 on Jan 18, 2009 13:49:33 GMT -5
so, am i under the right assumption that the mix screw could end up being turned a couple times to achieve proper mixture? i recently added an exhaust, to go with the k & n filters. right now i have 38sj, and 85 mj. i have been reading on here to mess with the screw before going any bigger on jets. my plug is showing on the lean side. when i go WOT, and let off i get major backfire/popping outta the exhaust.......
i am new on here, but site is full of knowledge... thanx!
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Post by yaris on Jan 18, 2009 14:56:05 GMT -5
hum... I might be running lean too, I often get backfire when I let it off from WOT. but my ruck is all stock, should I check for an intake leak? or try to richen this screw?
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Post by chanito on Jan 18, 2009 17:00:39 GMT -5
 Yes it seems you both need to richen the mixture, 1/8 of a turn should be enough 
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Post by theruck1 on Jan 18, 2009 17:11:09 GMT -5
Yes it seems you both need to richen the mixture, 1/8 of a turn should be enough i messed with it a little in the garage today. it's 30 degrees out, and snowing, so it'll have to do. i went about 3/4 richer, and a little more throttle for idle. it seems good, and the plug is showing much better. not quite golden brown, a little darker. better than lean though. i'll have to wait till i can road test.... thanx for the help... |
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Post by SoAzRC on Jan 19, 2009 13:54:41 GMT -5
I have not done this, but I have heard that a tool can b e made from the barrel of an ink pen heated and forced over the mixture "D" pin and left on until cooled. You can then turn adjust the mix and remove the pen for the next time...
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evilkaneval
Ruckster
Hi my name is Justin and I'm a Ruckaholic
Posts: 155
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Post by evilkaneval on Jan 19, 2009 19:28:15 GMT -5
 Slotting the mix screw is very easy. I took me all of 5 min. Just get a fine pair of needle nose pliers and unscrew all the way till it come out. I wrapped the part in a bit of plastic for protection (delicate). Then with a fine tooth hacksaw blade gently score a slot across the top. It doesn't take many strokes and little pressure is needed, as the screw is made of soft brass. Then make sure the part is clean and all pieces are still together. -screw-spring-washer-0ring-. Then screw in all the way till you feel it bottom out. **DO NOT TIGHTEN** Then unscrew 2-1/4 turns. (stock posititon)  No need for Dremmel. That is way over kill. Easy way to damage the screw, or Your fingers. 
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Post by theruck1 on Jan 19, 2009 21:35:55 GMT -5
i actually have a super fine tip needle nose that got the job done. i don't wanna mess with it now that it's set. i will when summer rolls around. thanx for the advise though. a slot will be much easier...
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Post by yaris on Mar 19, 2009 19:52:23 GMT -5
I got my ruckus for its first ride of the year a couple of days ago, then I remembered about this idle mix screw and that I might be running a bit lean for some reasons, so I unscrewed it a bit less than 1/8 of a turn, now it almost never backfire and there is a noticable gain in acceleration and in how it keep its speed when facing to the wind, I didn't took any hill with it since I ajusted the screw but I am pretty sure it will make a difference. For the top speed it didn't changed anything, I were already always hitting the rev-limiter. I might also try to unscrew it a bit more to see if it go better.
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Post by theruck1 on Mar 29, 2009 15:52:31 GMT -5
so i changed the jets today. i'm up to a 95MJ and back down to 35SJ.
it runs better, but still showing major lean on plug. i tried backing out the mixture screw, and it helped, but still showing lean on plug. dare i go to a 100MJ? this is getting frustrating. maybe i'm not understanding how much i should have to turn the screw. once i reached a point, it didn't seem to make a difference. i'm going on the "anything more than a full turn go bigger" idea.... or maybe go back to a 40SJ.....
K & N filters all alround, with vince hines exhaust...
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Post by Firegut on Mar 29, 2009 20:40:46 GMT -5
If you're using an iridium plug, I hear that they are rubbish for reading. They have a wider temp tolerance and clean themselves better.
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Post by yaris on Mar 29, 2009 20:43:06 GMT -5
if my plug is light brown is it okay?
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Post by Firegut on Mar 29, 2009 20:49:36 GMT -5
Iridium, yes. Copper, I think so, but I'm not certain.
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