Quote:
Originally Posted by hobbes748
Good morning folks,
My apologies for my first post being of the begging variety but I'm looking for a suitable workshop manual for a 2001 EC300 and non of the old links on the forum seem to be active any more.
But seeing as I'm here now, I should probably introduce myself. The name's Steven, I'm 53 years young and was born and still living in Scotland.
Bike-wise I've currently only got two. A 1997 Ducati 748SP which I've owned since 2000 and this 2001 EC300. Historically, they've virtually all been Italian makes (dunno why - just happened) other than a CB500 and an RMZ250.
I picked up this rebuilt (but poorly running) GasGas last year but I've only just got round to dealing with it in earnest. It came with some bizarre jetting which I returned to stock (still ran rubbish) and then moved up and down the range of jets, but nothing cured it.
Think it may well be an air leak so got a test kit on its way. We'll see what results we get and take it from there.
Thank you in advance.
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Send me a private message with your email address, and I will email you a pdf file of a workshop manual that will work with your bike. (It is a 2005/6 workshop manual; the first year that GasGas published one.)
The stock jetting was "motocross style" jetting, which promoted midrange to high rpm running, but didn't promote an engine idling or a smooth transition from low rpm to midrange.
For your bike, with it's Air Striker 1 carburetor (which required richer jetting than the AS 2 carb that came on later models), I would suggest a 42 pilot jet and a 178 main jet, coupled with a jet needle which has a better transition from low end rpms to the midrange rpms. The only jet needle from the GasGas factory that I could make work to my satisfaction was the N1EG. The N1EG is very hard to find, so most owners have moved to either a Yamaha 250 or a Suzuki 250 OEM jet needle listed as "optional" on the various parts breakdown listings. I have used a NEDJ, and lots of owners used a NECW. The various optional jet needles will allow the owner to customize their bike's power delivery as it transitions from low end to mid-range; a critical point in the bike's power delivery if you are doing enduro or trail riding in very tight or very rugged terrain.
If I can assist you in any other quests with the bike, let me know.
Good Riding to You!
Jim Cook