Magician Carb/Idle Issues

[ironheart901]

Hey guys, so I have the Magician.

I've replaced the stock carb with the Mikuni carb and also upped the main jet. I've had the same issue for a while now though, the bike won't idle unless I do two things: 1) turn the idle adjustment screw way in, where once I ride the bike for a bit it makes the idle rpms way too high, or 2) rev the bike for about 5 minutes or so until the idle "catches" and will remain without any throttle. This happens in about 45-55 degree weather. It seems like the bike will just not idle unless it has warmed up for a while, but I need to do this warming up by either revving it or turning in the idle adjustment. It also will not idle under the choke. Since I have replaced the carb, I'm not sure what else it could be. Should I up the pilot jet? Could it be something else? Or is it normal to have this kind of warm up process to get it to idle when first starting it up?

Thanks for any help!

[pistolclass]

Did you adjust the valves yet?

[2LZ]

Originally Posted by pistolclass

Did you adjust the valves yet?

As pistolclass says, this is very important. These motors always come with very tight valves.

Also, choke is usually only used briefly so idling under choke doesn't last long anyway.

What setting do you have the needle clip at on the slide? I set mine the fourth groove down to lift the needle slightly.

Set your idle mixture screw out 2 turns. That's the screw that points straight up next to the float bowl.

Also, if this doesn't help enough, yes, I'd increase your pilot jet. the stock mikuni comes jetted very lean. I think a 20/100??? I'd go a 110 or 112.5 or 115 on the main and a 25 or 30 on the pilot.

[OUTERLIMITS]

What you are experiencing is very typical of a carb jetted with too small of a pilot jet. When jetted like that they take an eternity to idle properly on their own.

[ironheart901]

Originally Posted by 2LZ

As pistolclass says, this is very important. These motors always come with very tight valves.

Also, choke is usually only used briefly so idling under choke doesn't last long anyway.

What setting do you have the needle clip at on the slide? I set mine the fourth groove down to lift the needle slightly.

Set your idle mixture screw out 2 turns. That's the screw that points straight up next to the float bowl.

Also, if this doesn't help enough, yes, I'd increase your pilot jet. the stock mikuni comes jetted very lean. I think a 20/100??? I'd go a 110 or 112.5 or 115 on the main and a 25 or 30 on the pilot.

So I have not adjusted the valves, I will look into that. Any good resources for learning how to do so? Thanks for the responses btw guys, I really appreciate it.

[BlackBike]

https://www.cscmotorcycles.com/Articles.asp?ID=293

Or dozens of other utube videos for a 250 valve adjustment

[pete]

Some motors are more cold blooded than others...
but it sounds like your pilot jet maybe a bit small
if you go bigger in the pilot jet yer may find it may
run rich at high RPMs.. so a smaller main jet could
be needed...



..

[tomalak007]

Originally Posted by ironheart901

So I have not adjusted the valves, I will look into that. Any good resources for learning how to do so? Thanks for the responses btw guys, I really appreciate it.

Go to youtube and search for Motocheez he has tons of videos for what you need to do.

[ironheart901]

So I replaced the stock 20 pilot jet with a 30 pilot jet. It really helped the no idle problem, but caused another - the thing screams at idle. I turned the fuel mixture screw all the way in and the idle mixture screw wayyy down and the bike, no choke, just screams at really high rpms at idle. I'm going to try a 25 to see if that is a perfect middle ground, but is it normal to see such an increase in idle speed when jumping from a 20 to a 30 pilot jet?

[Ariel Red Hunter]

Originally Posted by pete

Some motors are more cold blooded than others...
but it sounds like your pilot jet maybe a bit small
if you go bigger in the pilot jet yer may find it may
run rich at high RPMs.. so a smaller main jet could
be needed...



..

Pete, when you're right, you're really right!

[Ariel Red Hunter]

Originally Posted by ironheart901

So I replaced the stock 20 pilot jet with a 30 pilot jet. It really helped the no idle problem, but caused another - the thing screams at idle. I turned the fuel mixture screw all the way in and the idle mixture screw wayyy down and the bike, no choke, just screams at really high rpms at idle. I'm going to try a 25 to see if that is a perfect middle ground, but is it normal to see such an increase in idle speed when jumping from a 20 to a 30 pilot jet?

I would attack this problem in a different way. Dis-connect the throttle cable at the handlebar. Start the engine, see what happens as you pull the cable and let it go. Adjust the idle speed screw. Test it again. If it will not slow down, make sure the carburetor mounting bolts to the head are not too tight. With the engine running, slack them 1 flat on each nut at a time. Over tightening mounting bolts can cause this problem. But most likely it is the throttle cable routed wrong causing this problem.

[linemanxxlog]

So did you ever get her running right? My magician was a little hard to get to idle at first too but turning the idle mixture out to 1.5 turns seemed to fix it.

[ironheart901]

Originally Posted by linemanxxlog

So did you ever get her running right? My magician was a little hard to get to idle at first too but turning the idle mixture out to 1.5 turns seemed to fix it.

The bike idles much better now after its warmed up, but it still takes a while to warm up when first starting it for it to not die. It's pretty frustrating, but at this point I've gotten used to just making sure I keep giving it a little gas when I first get going as it gets warmed up. Is there anything you would recommend? I'm not quite sure what else it could be.

[youngrice89]

Hey all,

I just recently received my Magician 250 (my first bike) from TxPowersports. So far, the bike looks great though I only have 6 miles on it. The reason I am posting though is I am having issues keeping it running. I have been lurking in these threads for the past few days looking for advice on how to rectify this issue.

I have tried to adjust the idle screw. While it keeps it from dying it also smells like something is overheating/burning, as well as revving extremely high (at least it sounds like it, hard to say for sure without an RPM gauge). Part of the issue is that this is my first bike so I know 0 about the maintenance or common issues. The other part of my issue is there is NOWHERE that will even take a look at my bike in Austin, TX.

I'm hoping it is just something small I am missing. Any advice that a novice would be able to follow would be greatly appreciated!

[rvl8rida]

my bike took a couple days to burn off the factory paint smell off the engine.
other than that, I would say to buy an aftermarket carb that allows you to adjust it properly.