Solution to my excessive fuel use problem

[19Brendan81]

I know there has been a couple of guys here who have posted about excessive fuel consumption with their bikes and mine used to be the same. I was able to fix mine by leaning out the main jet by three sizes. I originally had a 122 in there, and I leaned it to 120 and the improvement in power was remarkable. I then leaned it out further to a 115 main and the power gain was again significant. I took the bike out on the weekend with this setup and rode hard for 2.5 hours on just over half a tank. I estimate an easy 4 hours from a tank now, possibly more which is a vast improvement over before when I could not make 2 hours, and would normally run out at 1 hour 50 or so.

All the extra power that I have avail now means I dont have to run around at full throttle all the time, hence the drastic reduction in fuel use. I couldnt believe that such small change had such a huge effect on fuel economy. Its a shame I have only sorted this out now, about 2 weeks before I upgrade to the 35mm carb. Oh well.

 

[KDX CRAZY]

Just be careful you dont lean it too far , and damage the engin .

 

[19Brendan81]

For info guys - On the weekend I went for a ride with a mate on a KLX300, road registered. So we were able to measure how far we rode. I took the opportunity to also measure the fuel economy of my bike. I filled the tank to the brim, then went on the ride, then came home and filled the tank to the brim again out of a graduated container. We rode for 92kms that day and I only used 6.5L of juice, so my bike uses 7 litres per 100km. This should give me a 130 km range out of my 10 L tank. I figured out that when my bike was set up poorly (too rich) I could only get 46km out of a tank so thats a vast improvement!

Bike is stock except 35mm carb and pipe mod as per canadian daves website. Temp was 10 degrees, riding between 1000m and 1500m.

Brendan