Gas Gas EC250F

Got side tracked with a Gas Gas enduro bike. I set the bike up for trail riding and did various jobs on the bike, like adding indicators using a KTM EXC lighting switch and loom.
 
Had a few electrical issue caused by powercoating, so sorted the earths out and rejetted the FCR carb with is a bit of black art by itself.
 
Bike was a nightmare to start so went through a learning curve on FCR carbs, I disconnected the TPS which improved things then started to look at the jetting, best bit of advice I found was if you turn the mixture screw in all the way and the engine still runs then the slow fuel jet is too large and that was the case with mine. As soon as I dropped a couple of jet sizes the bike started and ticked over perfectly.
 
Also be careful of opening throttle when trying to start the bike, as the pumper carb will pump fuel when the fuel is turned on and the throttle is opened. I found the best technique was to turn on the fuel, turn on the choke, open the throttle once and then the bike would start first time.
 
I also did the o-ring mod to the pumper linkage, which is basically taking the slake out of the linkage, there seem to be loads of info about this but the beest and most straightforword that I found was on YouTube – https://www.youtube.com/watch?v=8SNGm3tcQVY
 
Basically take out the freeplay and add the o-ring. If you remove the subframe and airbox you can see it all happening which then make a lot more sense.
 
As I’m looking to move deciced to sell of most of my bikes. So the Gas Gas is up for sale at Haines – https://www.hainesmotorcycles.co.uk/shop/virtual-showroom/