2013 KTM 150 problems

[cnrcpla]

Put a pic up of the spark plug.

[TotalNZ]

I don't think a pic of the plug will help unless he does a WOT plug chop cause it'll be the main thats too small i'd guess.

[Stusmoke]

Wow, thanks a lot for all your help

to answer a few questions

not sure with the octane, but it's unleaded petrol

Fuel to oil ratio is 1:40

Cooling and water pump is fine

Not sure about an air leak

Jetting is 185

You need to find out the octane rating of the fuel you're using. I would'nt go any less than 91 with no ethanol.

Fabbo raised a good point, are you certain that the break in the ring(s) is sitting over the bridge in the piston's ring groove?

post up pictures of your cylinder. Your description of it sounds bad. Also post up a picture of the zappy end of your spark plug.

EDIT: my bad for the poorly worded bridge sentence. Its been corrected.

[TMKIWI]

Also post up a picture of the zappy end of your spark plug.

Is that a technical term stu.?

[Stusmoke]

Also post up a picture of the zappy end of your spark plug.

Is that a technical term stu.?

Hey it zaps so why not call it the zappy end?  Whats the fun in spark testing if you don't use your own body as the ground

[gpnewhouse7]

Also post up a picture of the zappy end of your spark plug.

Is that a technical term stu.?

Hey it zaps so why not call it the zappy end?  Whats the fun in spark testing if you don't use your own body as the ground

Hahaha thought it was just us farmers that tested electrics by putting our fingers electrical stuff and turning the engine over in the hope of being electrocuted.

[Stusmoke]

Also post up a picture of the zappy end of your spark plug.

Is that a technical term stu.?

Hey it zaps so why not call it the zappy end?  Whats the fun in spark testing if you don't use your own body as the ground

Hahaha thought it was just us farmers that tested electrics by putting our fingers electrical stuff and turning the engine over in the hope of being electrocuted.

I've lived out in the country my whole life, so thats mostly true

[SpeckleZz]

Guys I think I solved it.

Frustrated at KTM I rang my dealer back up and told them to sort this out, so they said send the piston, cylinder, barrel and spark plug to them, so I did. They phoned today and said the bike was running too lean. So correct me if I'm wrong, the two times I ceased the bike up I was on the gas and there's not been enough oil going through making the bike overheat. I've never had this problem on my 2010 125 and I wish my dealer had said if your quite a fast lad then step up the jetting. I did some searching and I've heard 195 - 205. But I'll got on a KTM forum to find out most probably.

Thanks to everyone who helped to find the source of the problem you've been great help.

[Stusmoke]

Guys I think I solved it.

Frustrated at KTM I rang my dealer back up and told them to sort this out, so they said send the piston, cylinder, barrel and spark plug to them, so I did. They phoned today and said the bike was running too lean. So correct me if I'm wrong, the two times I ceased the bike up I was on the gas and there's not been enough oil going through making the bike overheat. I've never had this problem on my 2010 125 and I wish my dealer had said if your quite a fast lad then step up the jetting. I did some searching and I've heard 195 - 205. But I'll got on a KTM forum to find out most probably.

Thanks to everyone who helped to find the source of the problem you've been great help.

No, theres been too much oil going through. Well thats not the cause, the cause is that your bike has a lean Air/Fuel mixture. Lack of oil is not to blame.

Whenever someone is referring to a rich or lean air/fuel mixture, they are using rich and lean with respect to the fuel that is in the mixture. Therefore, if your bike is running lean, then there is too much air and not enough fuel in the combustion chamber. This results in an increase in the heat generated by the combustion of the fuel and air and its what was causing your seizure problems. Lucky its not a four stonk

go on KTM talk, find out what the usual temperature is where you ride, go on google maps to find your elevation, provide these details to the guys on KTMtalk and watch the magic happen.

[2T Institute]

Is the 150 bridged exhaust port?

[Coop]

Though I suspect the main jet is the culprit there is more to jetting that the main. Main jet, pilot jet, needle, clip position, etc.

And like Stu said the mix isn't involved in jetting. Mix is fuel/oil, jetting is fuel/air.

[Stusmoke]

Dont take what were saying to mean that you can just put whatever amount of oil in you feel like. When a bike is jetted, it needs to be jetted for a specific fuel/oil ratio, that is, your fuel. If you run 32:1 and you rejet your bike for that oil/fuel ratio, you need to stick to it. Its no good waking up one morning and thinking hey I wonder if I should try 25:1 maybe it will make my engine last longer. Thats not good and the reason is that, becasue there is more oil in the fuel at 25:1 than there is a 32:1, it translates into a leaner air/fuel mixture during the combustion cycle. Granted a change that small wouldn't be a disaster I'm just using that as an example. If you dramatically change your premix ratio, you might need to rejet. But its usally just one size either side and it sounds like you bought that bike brand new so there should be a few optional pilots, needles and mains. Hopefully you can get away with using those.

Good luck, glad you got the problem sorted.

[evo550]

Guys I think I solved it.

Frustrated at KTM I rang my dealer back up and told them to sort this out, so they said send the piston, cylinder, barrel and spark plug to them, so I did. They phoned today and said the bike was running too lean. So correct me if I'm wrong, the two times I ceased the bike up I was on the gas and there's not been enough oil going through making the bike overheat. I've never had this problem on my 2010 125 and I wish my dealer had said if your quite a fast lad then step up the jetting. I did some searching and I've heard 195 - 205. But I'll got on a KTM forum to find out most probably.

Thanks to everyone who helped to find the source of the problem you've been great help.

It's not the dealers fault that it's running lean, how were they to know how, what, where, when and why you ride it.
You would have got a manual with it, read it and use whats recommended for your circumstances (as a starting point). Temp, altitude and atmospheric conditions all play a part in your jetting. Mix your fuel to KTM specs 50/60 :1 and leave. Then work on getting the jetting right.
Don't despair...in 5 yrs, 27 pistons and 6 cylinders you'll be a real pro at jetting.

[2T Institute]

Dont take what were saying to mean that you can just put whatever amount of oil in you feel like. When a bike is jetted, it needs to be jetted for a specific fuel/oil ratio, that is, your fuel. If you run 32:1 and you rejet your bike for that oil/fuel ratio, you need to stick to it. Its no good waking up one morning and thinking hey I wonder if I should try 25:1 maybe it will make my engine last longer. Thats not good and the reason is that, becasue there is more oil in the fuel at 25:1 than there is a 32:1, it translates into a leaner air/fuel mixture during the combustion cycle. Granted a change that small wouldn't be a disaster I'm just using that as an example. If you dramatically change your premix ratio, you might need to rejet. But its usally just one size either side and it sounds like you bought that bike brand new so there should be a few optional pilots, needles and mains. Hopefully you can get away with using those.

Good luck, glad you got the problem sorted.

25:1 =4% oil and 32:1=3% oil is your bike jetted to within 1% of a seizure? You should be running 20-25:1 anyway. 

[motoxr377]

awesome