Two stroke advice

[phil.hughes1983]

2011 ktm 300exc is on it's way to me next week.

I was just wondering what transmission oil do people generally use on thier bikes

Also the pre mix oil any recommendations ? And ratios your using. Cheers.

Not sure how the bike is jetted till I get it home and take a look.

Will ask the guy what he has been running it on when I next see him

Phil

[kris]

I have a tatty 2009 one

Luke Bull (on here @Luke B) did a great job sorting the jetting on mine so now it is good on fuel .. before that it was DREADFUL

50:1 oil/petrol
amber spring
I use ATM (automatic transmission) for my gearbox oil

[G-Bru]

Yup, most of us here use ATF in our trannies, it's cheap and available from Halfords.

As for Premix, well, you're gonna get 100 different answers just pick a very good reputable brand and you're golden.

50-60:1 is optimal then jet accordingly.

Have fun on the new toy!

G

[phil.hughes1983]

Yeah tell me about it. Everywhere I look on forums etc there are a million different answers.

Bike is running standard pipes and until I get the carb apart not sure how it's jetted.

Is there a chart for what jet settings to use to the premix ratio?

Sometimes there's just way too much information. And can be counter productive. My mate has a dyno locally so may be worth getting it checked and set up on there.

I think I may try to find a larger fuel tank as it's stock 9.5 is possibly on the small side

[G-Bru]

Ride it first to see how it feels and report back here.

If you need to adjust the jetting, you'll find a jetting chart in your owners manual which is per manufacturers specification of 60:1. Use the factory setting as a starting point, adjust the pilot first along with air screw, then work on needle (most 300's are on clip 3 or 2), lastly your main. Some leg work in getting smokers setup, but once you've nailed it they are friggin awesome!

I wouldn't waste your money on a bigger tank, we all run stock - if your jetting is on the money you'll get good mileage out of a tank anyway.

G.

[leejerome]

Very helpfull information was just going to ask the above .

[kris]

imho .... i think the bigger tank was money well spent ...it was a like for like swap... useful in wales when you are on a lee walters awol mission

[phil.hughes1983]

I will keep my eye out for a bigger tank in the future and just see what it's like at the moment. I will invest in the jets and needles and have a play around and see what works best. What do you run on your bike ? Thanks

[burls]

In my experience jetting is more an art than science. It took me 9 months of trial an error to arrive at what I think is the perfect jetting. As has been said, start with the standard jetting for the weather from the chart in the book and work from there. Every bike is different so it doesn't always figure that you can copy your mates set up. I was also amazed at the difference the weather makes. So much so that I run a different set up for summer and winter. Patience is a virtue with this job. You won't arrive at the perfect set up at the first attempt. I'd also avoid taking it to a dealer as they'll just put in the chart settings. Good luck.

[phil.hughes1983]

Cheers Andy. I will buy a few different bits and have a play. Went out for a little ride after I picked it up around Chichester and bloody hell the bike is an animal if you open it up. Also very rideable at the same time. Totally different to 4t bike and loads more vibrations.

[kris]

Jetting is the only two stroke downside