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  #1  
Old 07-07-2018
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shawbagga shawbagga is offline
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'17 TE250 jetting specs

G'day all. Mate has a '17 TE250 bog stock with around 40 hours on it. I haven't actually ridden it but the thing is a pig on fuel. I'll get an easy 100km+ riding tight single on my WR300(admittedly has a lectron) whereas he's bone dry at 70!
I know the Mikuni probably not as economical as the old Keihin but surely 10km/L is achievable? He's not real fast or a revver either.
It's rich as on start up like a lot of these '17+ KTM's seem to be(multiple starts almost fouls) so assuming can go a size down on pilot. Not sure what his float is set at but it doesn't piss fuel until 45 degree lean over so must be close.
Not excessive spooge but more than I like. Im guessing main could come down a size too as they're normally jetted fat from factory for warranty reasons.

Main question is what needle & clip setting is everyone using short of buying a JD kit as I'm guessing most of the fuel savings will come from here? Not sure what's in it currently but would just be standard as he's changed zip.

I've told him may be worth getting head done at rebuild time for better fuelling/power/economy. In SW of WA so 0-500m, 5-20 degrees in winter(up to 30 in summer as only morning rides) & usually not much humidity. Cheers
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Old 07-07-2018
cluffie cluffie is offline
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Maybe get him to pull the carby down and find out what settings he's got now.Then he will be able to be steered in the right direction.
How does the bike ride is also important and terrain/speed/wot time.
Reducing the main to obtain fuel economy is not a good idea and not overly sucessful unless it's out by heaps and then it would have a flat top end.
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Old 07-07-2018
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No experience with mikuni but if 17 husktm's have the same manual with jetting page, I would just go leaner until 10km/L is achieved while keeping a bit of spooge (excess oil better than not enough I figure).

Worked for keihin good i thought, self taught jetter
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Old 08-07-2018
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Quote:
Originally Posted by RMJay84 View Post
No experience with mikuni but if 17 husktm's have the same manual with jetting page, I would just go leaner until 10km/L is achieved while keeping a bit of spooge (excess oil better than not enough I figure).

Worked for keihin good i thought, self taught jetter
Yeah told him to check manual for recomendations
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Old 08-07-2018
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My mate has a '17 300 he bought from Newcastle KTM. They jetted it and it's pretty much been a set and forget kinda bike for 100hrs. He gets 100k's to reserve no problem.

It might be worth a phone call to them to ask? You could say you've bought a bike originally supplied by them and the last owner has played around and ruined it?
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Old 08-07-2018
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My late brother inlaw had the same bike
We went with the jetting specs Newcastle Ktm suggested
Transformed performance and mileage
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Old 08-07-2018
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Quote:
Originally Posted by cluffie View Post
Maybe get him to pull the carby down and find out what settings he's got now.Then he will be able to be steered in the right direction.
How does the bike ride is also important and terrain/speed/wot time.
Reducing the main to obtain fuel economy is not a good idea and not overly sucessful unless it's out by heaps and then it would have a flat top end.
Yeah he wants me to help him sort it so will suss out what's in it. Not much real WOT time. Yeah I'm assuming needle is main culprit as spends most of its time trail riding in bottom-mid
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Old 13-07-2018
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True that. what im saying is tsp doesnt necessarily mean a fix. Jetting needs to be sorted to suit conditions

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Old 13-07-2018
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Originally Posted by LAPPER View Post
True that. what im saying is tsp doesnt necessarily mean a fix. Jetting needs to be sorted to suit conditions

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What Iím saying is your jetting wonít help economy if you hold it wide all day.
I have a Ď17 300 and for trail riding I get anywhere from 100-140 km per tank depending on terrain. If I race (I use the term race very loosely) I get about 60km per tank - same jetting just different attitude towards throttle position.
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Old 24-07-2018
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Originally Posted by Pete40 View Post
....

I'm going to get my head done by TSP, slide mod, ignition mod and stick with the Mikuni for now. Will buy a PWK38 later if required.
Done. Don't need the Keihin.

Quote:
Originally Posted by cluffie View Post
Like.
So do I.

Just do it.

Like - holy hell. What a difference.

Fuel consumption - don't know yet - but who cares!

One problem.... no excuses now. My sh1t riding is exposed even further!
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