KTM 300 Database

[anderson750]

I ran a Turbine Core II in the desert mainly and would put a Q-Stealth on for Idaho City. Q-Stealth is quite a bit quieter, but I think it also made the bike run a little fatter.

 

[Gravy]

2015 Husqvarna TE300 at 172 main and 35 idle. NBR H Needle at 3 from the top and idle speed screw 1.75 turns out and idle air screw 2 turns out. My idle seems ok but maybe a bit low, but I'm coming off 4 stroke land.

Fmf stock pipe and fmf turbine core 2 silencer.

I see what jetting you all are running but what premix ratio?
My book recommends a 172 main and 35 idle but at a 60:1 ratio.
Wouldn't a 50:1 be leaner? (More oil therefore less gas).



Would you all be willing to update your post with what premix ratio you're running please?

 

[jeeper]

50:1. Ipone race oil.

 

[anderson750]

I run 40:1 in everything. Yes 50:1 will be leaner than 60:1 so you may need to adjust your jetting a little but not a lot. The extra lubrication on the main bearings is a good thing,

http://forum.dirtrider.com/discussion/7169620/spooge-101-/p1

 

[Gravy]

Thanks Paul I kinda understood the theory but that link goes into great detail.

I was just curious because the majority of you guys seem to be running a 165 main.

 

[Cascadia]

50:1 motul

 

[glockman]

40:1 yamalube or 50:1 klotz. Slavens has a great video on premix ratios. He runs amzoil at 80:1.

Sent from my HTC One_M8 using Tapatalk

 

[Gravy]

Did some reading last night 2015 has a different carb with a bigger slide, so more air means bigger stock main jet. Makes sense now.

 

[ricsrx]

Slavens has a great video on premix ratios. He runs amzoil at 80:1.

I am also running amzoil @ 80:1

 

[ricsrx]

After getting back from five mile pass on Wednesday, my idle rpms are surging high and low, when i try to lower the rpms for my idle, the bike will die when the rpm surges go low.


does anyone know what will cause my idle to surge like that

 

[Gravy]

vacuum leak or a plugged jet maybe?

 

[anderson750]

After getting back from five mile pass on Wednesday, my idle rpms are surging high and low, when i try to lower the rpms for my idle, the bike will die when the rpm surges go low.


does anyone know what will cause my idle to surge like that

Bikes that are doing the "ring a ding ding" are usually suffering from a lean condition. Does it have a high rev when you first start it?

 

[ricsrx]

when you first start it up it idles normal, the warmer the bike gets the worst the surging gets.

we are going to clean the carb today, its crazy, i have never seen any thing like it.

 

[anderson750]

It is a lean condition that is showing up when your bike is at basically a closed throttle when the bike is warm. You can commonly see this in bikes that are jetted properly when they are being worked hard. If you were not working the bike hard then something has changed. It could be caused by jetting or you could possibly have an air leak somewhere.

 

[rholbrook]

With a lean pilot you also get a hanging fast idle. One thing to check while you have it apart is the needle seat. Make sure there is not a ring in it. The one I am talking about is the one on the float needle. I have had those cause similar issues.

 

[ricsrx]

after cleaning the carb the problem was resolved, plugged idle circuit i guess..

thanks for all the feed back, it lead us in the right direction!
btw the cheapo plastic idle adjustment screw broke..

 

[jeeper]

after cleaning the carb the problem was resolved, plugged idle circuit i guess...

:thumbs:

 

[jeeper]

What do you guys run for transmission oil?

 

[glockman]

I've been running ATF+4 in my kids bikes for a couple years and have had not issues. On my 300 I started with Rotella 15w40 conventional but the last change I switched to ATF.

 

[Cascadia]

I use klotz flex drive 30.