The KTM300 Thread - Page 56

Leydos · 03-14-2013, 01:59 PM

I run mine at 60:1 high quality synthitic (Motorex)as stated in the Manual, no spooge, no fouled plugs, 100+ hours and still starts first kick and pulls like the it did on day one. I think KTM have enough test data to know what pre-mix works, I find it irritating to ride behind someone running 40:1 on single trail, there is no need to subject fellow riders to a smoke screen just so you can maybe go four seasons without doing the bottom end instead of three.

DirtJack · 03-14-2013, 03:55 PM

Quote:

Originally Posted by Leydos

I run mine at 60:1 high quality synthitic (Motorex)as stated in the Manual, no spooge, no fouled plugs, 100+ hours and still starts first kick and pulls like the it did on day one. I think KTM have enough test data to know what pre-mix works, I find it irritating to ride behind someone running 40:1 on single trail, there is no need to subject fellow riders to a smoke screen just so you can maybe go four seasons without doing the bottom end instead of three.

Good advice. What is sometimes forgotten is that 40:1 is actually a leaner fuel mixture than 60:1.

Lolodesiles · 03-15-2013, 08:46 AM

same as Leydos and no problem at all, almost 200 hrs

dirtyoffroad · 03-15-2013, 08:58 AM

Quote:

Originally Posted by DirtJack

Good advice. What is sometimes forgotten is that 40:1 is actually a leaner fuel mixture than 60:1.

how do you figure that?

ganshert · 03-15-2013, 09:24 AM

Quote:

Originally Posted by dirtyoffroad

how do you figure that?

The more oil in the mix the less fuel therefore 40:1 is leaner than 60:1. Not by much but it is leaner.

three things control air fuel ratio on a 2 stroke instead of just air and fuel on a 4 stroke

oil
air
fuel

We can assume air is constant...

40:1 provides 3.2 ounces of oil and 124.8 ounces of fuel / gallon

60:1 provides 2.1 ounces of oil and 125.9 ounces of fuel / gallon

40:1 is leaner as there is less fuel for the same quantity of air.

The question is what is the effect of a lean state due to more oil. Will the engine run hotter because it's lean or cooler because there's extra oil?

JohnE65c · 03-15-2013, 05:08 PM

Quote:

Thats good to know thats in there, also how well do these bikes respond to putting along and not killing it all the time, my old yz250 liked to foul plugs?

No problem with fouling at all with my '06 xcw.
I also have a coolant overflow catch tank.
Not sure if it's really needed, since it was on the bike when I bought it, but I never had any boil over issues in the Fl. sand.

Capt. Egregious · 03-17-2013, 07:15 PM

Any of you 300 guy's using cooling fans or see a need to run a fan or overflow tank? I haven't got enough seat time on mine to get a feel for the cooling system.

How about db snorkel? I don't think they are in business anymore but anyone have first hand experience with the that sort of product?

CO/WV · 03-20-2013, 07:15 AM

back to fuel capicity on my brand new leftover 300 xc. To ride the white rim trail...... 111 miles i will have 50 percent too little or 50 percent too less fuel.

AMCJEEP · 03-20-2013, 12:11 PM

Quote:

Originally Posted by Capt. Egregious

Any of you 300 guy's using cooling fans or see a need to run a fan or overflow tank? I haven't got enough seat time on mine to get a feel for the cooling system.

How about db snorkel? I don't think they are in business anymore but anyone have first hand experience with the that sort of product?

There is a db snorkel on mine. Not really sure of the pros or cons of it. It has been on the bike since I got it from chippertheripper I know he said he wished they still made them for his new 300.

Maybe he will chime in on how well it actually works. I haven't really ridden with any other 2-strokes, and have not tried running the bike with it off to see a difference.

i did find this though

KingJeff · 03-22-2013, 12:54 PM

I have a 97 300 EXC that I got last year. We were in Moab last weekend, and all of a sudden I'm getting no friction at all on the kickstarter. I was able to roll-start it down hill to finish the ride, and there was no grinding or weird noise/feel, but now I'm home and ready to figure this out. I'm a novice wrench. Am I getting in over my head on this, or is it not that complicated?

RideFreak · 03-22-2013, 04:14 PM

Quote:

Originally Posted by KingJeff

I have a 97 300 EXC that I got last year. We were in Moab last weekend, and all of a sudden I'm getting no friction at all on the kickstarter. I was able to roll-start it down hill to finish the ride, and there was no grinding or weird noise/feel, but now I'm home and ready to figure this out. I'm a novice wrench. Am I getting in over my head on this, or is it not that complicated?

Taking off the sidecover and doing an inspection isn't difficult, the issue will probably be obvious once you have it open.

KingJeff · 03-22-2013, 04:38 PM

Thanks! I'm going to pull it apart tonight

bykpimp · 03-27-2013, 06:27 PM

Quote:

Originally Posted by KingJeff

I have a 97 300 EXC that I got last year. We were in Moab last weekend, and all of a sudden I'm getting no friction at all on the kickstarter. I was able to roll-start it down hill to finish the ride, and there was no grinding or weird noise/feel, but now I'm home and ready to figure this out. I'm a novice wrench. Am I getting in over my head on this, or is it not that complicated?

Replace the top end. Piston, rings, piston pin bearing............. Sneek a peek at the crank while your'e in there.

Capt. Egregious · 04-10-2013, 10:44 PM

Rode the 300 last weekend at the Desert 100. This bike rocks

. Here are afew pics.

Capt. Egregious · 04-10-2013, 10:54 PM

And a couple more pics just for good measure

The side stand and a bunch of other parts I ordered from KTM Hutt back in February still havent come

03-22-2013, 12:54 PM	#835
KingJeff Adventurer Joined: May 2010 Location: Front Range Oddometer: 32	97 EXC kickstarter issues I have a 97 300 EXC that I got last year. We were in Moab last weekend, and all of a sudden I'm getting no friction at all on the kickstarter. I was able to roll-start it down hill to finish the ride, and there was no grinding or weird noise/feel, but now I'm home and ready to figure this out. I'm a novice wrench. Am I getting in over my head on this, or is it not that complicated? __________________ 97 KTM 300 EXC 95 XT 225 02 PW 50 04 PW 80

03-22-2013, 04:38 PM	#837
KingJeff Adventurer Joined: May 2010 Location: Front Range Oddometer: 32	Thanks RideFreak Thanks! I'm going to pull it apart tonight __________________ 97 KTM 300 EXC 95 XT 225 02 PW 50 04 PW 80

04-10-2013, 10:44 PM	#839
Capt. Egregious Gnarly Adventurer Joined: Apr 2010 Location: Edmonds Washington Oddometer: 243	Rode the 300 last weekend at the Desert 100. This bike rocks. Here are afew pics.

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03-14-2013, 01:59 PM	#826
Leydos 2 Stroke Joined: May 2012 Location: Brisbane QLD AU Oddometer: 12	I run mine at 60:1 high quality synthitic (Motorex)as stated in the Manual, no spooge, no fouled plugs, 100+ hours and still starts first kick and pulls like the it did on day one. I think KTM have enough test data to know what pre-mix works, I find it irritating to ride behind someone running 40:1 on single trail, there is no need to subject fellow riders to a smoke screen just so you can maybe go four seasons without doing the bottom end instead of three.

03-15-2013, 08:46 AM	#828
Lolodesiles Adventurer Joined: Aug 2012 Location: Switzerland Oddometer: 29	same as Leydos and no problem at all, almost 200 hrs

03-17-2013, 07:15 PM	#832
Capt. Egregious Gnarly Adventurer Joined: Apr 2010 Location: Edmonds Washington Oddometer: 243	Any of you 300 guy's using cooling fans or see a need to run a fan or overflow tank? I haven't got enough seat time on mine to get a feel for the cooling system. How about db snorkel? I don't think they are in business anymore but anyone have first hand experience with the that sort of product?

03-20-2013, 07:15 AM	#833
CO/WV Adventurer Joined: Nov 2008 Oddometer: 23	back to fuel capicity on my brand new leftover 300 xc. To ride the white rim trail...... 111 miles i will have 50 percent too little or 50 percent too less fuel.

04-10-2013, 10:54 PM	#840
Capt. Egregious Gnarly Adventurer Joined: Apr 2010 Location: Edmonds Washington Oddometer: 243	And a couple more pics just for good measure The side stand and a bunch of other parts I ordered from KTM Hutt back in February still havent come