I just recently got a Kyosho DBX and I just cant seem to get it tuned, at first I had it running half decent then i hada go and screw around with the idle adjustment and now the HSN and the LSN and now they dont even seem to work on factory settings, the HSN is supposed to be 2.5 out and same with the LSN. The Idle doesnt have a factory setting apparently cause I cant find it in the book. ALSO is it normal to have a small amount of gas coming out where the Glow Plug is? Please Help any tuning tips would be HIGHLY appreciated. Thankyou

If the glow plug is installed their should be NO fuel leaking around it. You do have the copper seal on the glow plug right? Also, is it flooding? If you're trying to start it for a while and it won't start, take the glow plug out, turn the RC upside down and rotate the engine several times. If fuel is coming out you're probably running too rich. The first area to start with would be to lower the LSN a 1/4 turn or so to the right. It's also a pain to start new nitro engines. Once they're broken in you can start them on 1 or 2 pulls if it's tuned right.

Anytime you are having problems with it running you should have an extra plug on hand. 99% of the time if you think you have it tuned pretty good then all of the sudden it stops running good its the plug. You should have no fuel coming out of the plug. Check for tightness and copper gasket. Also any time you change fuel you need to retune and anythime weather changes you need to retune. They dont stay tuned.

There is a copper ring and yeah there is def some fuel comin out, i'l have to drain it out, i'll put the LSN at 2.5 turns out like factory then turn it in 1/4th and give it a few goes if anyone else has any other tips, it'll be highly appreciated thanks.

get a new plug. and make sure it's the correct one. I put the wrong one in my MT and it ran like crap and over heated. Then I put in the correct plug and it worked again.

No there shouldn't be any gas coming out where the glowplug is, unscrew it and make sure everything's ok as you may be getting leaks

Is the glow plug tight when there is fuel leaking out? Remeber that the plug seals the chamber, so if thats not sealing you are losing compression and will make tuning a *****. Get the leak sorted out first, that will definitely be a problem.

Yeah, Im gonna fix the leak today maybe thats why my tuning is so hard, so i'll pick one up today. It still seems to be leaking a little bit so.

I dried out everything too out the plug replaced it the engine started fine on factory settings but I think the Idle screw is still messed up or something is wrong, the engine just wants to take off. I had the LSn set a little bit to where it was like you tap the throttle and it went but sometimes would like speed up and hit like really high rpms or sometimes id go to gun it and itd bog out. the engine is like on the fritz i just cant put my thumb on why this thing is running so screwy. I mean it should be cake. you set the LSn and HSN to factory and basically all yous hould have to do from there is turn clockwise to make it run better but im all over the place! Need some sick help lol

Thanks

Tuning will be easier once you fully break it in, how many tanks have you run through it? You should keep it at factory settings when tuning which should always be rich.

As for the Idle screw.. have you tried just trimming the throttle via the receiver? Trim it engine off until the throttle is closed completely than turn it one twitch, when it starts trim it accordingly. Usually ive found that poor idle is because of LSN setting. Make sure you dont over tighten the plug, just a firm tightness is sufficient (ooo sounds dirty o_O).

Bogging down can happen when its too rich or lean. Try making it very rich and listen to how the engine sounds. Now make it lean and listen how that sounds. Maybe this will help.

Just make sure you always see atleast some blue smoke coming out of the exhaust. At full speed tap WOT and see if puffs of smoke are coming out.

1/4 turn incriments are kind of big, i would suggest doing at most 1/8 turn incriments. I feel its easier to adjust your HSN first than adjust your LSN for start off acceleration than go back and fine tune HSN.

Wish i could help you but im sort of a beginner in the hobby too. I hope this helps a little. Just some things that made it easier for me to get tuning down. And beleive me it took me a wile.

Best of luck!

Thanks Crypt, your only like 2 hrs away from me you should come up and help ahahahahahaha. im gonna try all that and see what happens idk it was just running weird and yeah at the most i may have ran 2 tanks if that.

Hold on a minute... You will damage the engine if you lean it before being broken in. The piston sleeve has to have time to conform and mold to a perfect fit. Return your LSN and HSN to factory Break-in settings illustrated by your manual. This is very important. The engine cant get too hot wile being broken in so you must leave it at factory settings wile breaking it in. Break-in will take at least 6 tanks of gas. I use this method:
1st Tank - Idle
2nd Tank - Quarter Throttle Held no more than 2 seconds at a time
3rd Tank - Quarter Throttle
4th Tank - Half Throttle - Held no more than 2 seconds at a time
5th Tank - Half Throttle - Held no more than 4 seconds at a time
6th Tank - Full Throttle - Held no more than 1 - 2 seconds

Than i recommend for at least 4 more tanks you take it easy and dont apply full throttle for more than 4 seconds at a time.

During break in you will feel more and more power and after being finished you can start leaning your mixture.

only 2 tanks. Yea, don't get frustrated. and don't play much with the needles if you can get a few more tanks through it. after about 6 or 8 tanks these things start right up and work like you are hoping. It's always a little frustrating during the break it period. Trust me.

Oh, and here is something I posted after two months of doing this. it might help.

http://www.rcuniverse.com/forum/m_8514869/tm.htm

Awesome you guys are great I guess I just gotta play around with it, im just scared about breaking something via all this revving and stuff.

you are going to learn a lot of stuff. Just ask a lot of questions on this forum. I found that people helped me a lot.

Yeah I noticed everyone is so helpful on here, tomorrow I get outta work at 345pm and its gonna be like 60 degrees out. I will tune the damn thing and run it for hours tomorrow until it runs right, So expect questions tomorrow!

ok I have all the needles set back to factory, I held the exhaust to prime, I pull the cord it'll start for a second stop and so on. What do i turn so it wont do this? Im making this question real basic a newby bc i could prob figure it out myself but i dont wanna screw this up

My engine usually does that anyway you just have to keep pullng until it will be a consistent idle then keep blipping the throttle to warm the engine up, the break in will annoy the s*** out of you but it'll get better, other things to consider are "is your engine having leaks elsewhere?" or is your glowplug bad?

GLow plug is brand new, the Leak that was there doent seem to be there anymore. but I do know these cars are know to have bad front bears that leak idk. i'll keep trying

Now it doesnt even wanna start any more. idk i think theres something wrong with the HSn and it getting gas.....seems like whenever i put gas right through the carb it runs a little bit other wise it wont run at all.

Hmm.. well i know that when my mates Inferno wouldn't start (it has the gxr21 engine) it took alot of priming to get the fuel into the engine, just take your glowplug out, blow on to the exhaust gas pressure line and cycle the engine slowly whilst your doing this. Do this for a while until you see fuel splashing out the top of the cylinder head, then pull the engine pullstart hard as if youre trying to start it there should be quite a lot of fuel seen as its on factory settings. I know the inferno was hard to start but once we'd done this it started every time.

Good tip, will try thanks so much guys

Starting is a bit annoying when breaking in but most of the time you can correct any stalling or not starting problems by trimming the throttle via the controller. You will find a spot a tad open from closed that will make it easy to start. Try making it fully closed if it doesnt start then trim a little tiny bit open and try. Remember dont pull the cord too hard and dont pull it out fully or it might break.

ill make sure to add that onto the list of things to try as well!