shokrefumi

Feel like a bit of an idiot now... Couldn't wait to go over everything on the bike once again. Checked all the electrics and the carb for the thousandth time. Still nothing. Decided to pull off the flywheel... Everything OK. Timing: OK. Took the cylinder off and found a nice surprise! Both rings on my brand new S3 piston tightened up and got stuck in the ring groove. It's a mystery to me why, as they were gapped to .30 mm and were installed the right way up. Maybe the oil (which i put there 7 months ago) gummed up and made them stick? anyway, cleaned them up, put everything back together and now she's a first kick starter. Loving life again! Thanks for all the great advice people, it's been a real adventure!

The spark I get while kicking it over (with the plug grounded on the cylinder) is a blue to white color, and quite strong for slow kicking. The fuel cut off needle valve (with the rubber tip) is moving freely both ways. Haven't tried putting the float level back to 18.5, will do tomorrow. Also, tried starting it without the airbox, no joy either. While kicking it over a lot I do get a bang and a pop out of the exhaust on occasion. Maybe it is a grounding problem, but how come I've got spark when I lean the plug on the cylinder but not when the plug is screwed in? baffled...

I took the carb off something around 20 times today, spent two cans of Carb Cleaner on it and blew out every little orifice I could see (and I even used a magnifying glass). What's strange is that it's not firing even when pouring gasoline directly through the spark plug hole. Must mean it's decided to fire a spark at the completely wrong time. Even checked my reed valve. Oh yeah, I've tried bumping it, dragging it with a car and even hand starting it on the stand (put it into 6th and turn the wheel by hand very fast). Nothing worked, but still haven't given up on it. I'll make a flywheel puller on Friday to try and see if the stator has loosened/spun or did something else. If not, I'm in for a complete Kokusan conversion. Where does one find these?

My flywheel hasn't got a metal bar, but a channel dug out in it. Do pick-ups go crazy and read a wrong position? What about the distance from the pick up to flywheel? How much should the clearance be?

Just went to check for this; no, they are in the correct way. Even with 10 cc of fuel down the plug hole she's not firing. Leads me to suspect timing. Which is terribly odd if it fired up yesterday and if the key is in place. Very, very strange. Off to the petrol station to see if brand new fuel solves it.

The plug is moist, not really wet. That gives me doubts that it's not getting enough.

I cleaned everything, even soda blasted the damn thing, then sprayed carb cleaner everywhere and blew it out with air. Maybe I should repeat the process as it's been stood still for a while?

Since writing here I've tried a new voltage regulator and checked and rechecked the carb. Maybe I'm missing something really simple. Also, changed 4 plugs (one used and 3 new), even tried gapping one down to 0.3 mm. There's enough spark to get a much larger engine going, but by now I'm worried that it's throwing a spark at the wrong time. Does anybody know when the dug out in the rotor needs to pass the pick up (how many mm before TDC)? Although, the rotor hasn't spun, and it did start three times before the ride... Does anybody have the settings for the Dell'orto carb? I've tried a 45 pilot jet, but no change. Where should the idle and mixture screws be? I've been trying 2,5 turns to 4 turns out with the mix screw and every position known to man with the idle screw. Thanks for the help, I'm really keen to get riding!

Hate to join a new forum and make my first post a problem one, but that's the way the cookie has crumbled. I come from the beautiful country of Croatia, where, bar one Ossa and another GasGas owner, trials is as a foreign word as Okonomiyaki. I really enjoy it and love these bikes, but mine is being a stubborn idiot at the moment. So this is my story. Bought the bike in '12, rode it carefree for a few summers and then stopped using it for a year while I changed jobs and moved house. Got it to the new house last July, rode it once and then during one ride it just cut out and died. Bike had no spark, I tried all the usual things but in the end I had to order a new CDI. While I was at it, I ordered a new voltage regulator as well, because you never know. The bike has Ducati electrics and electronics all round (which is strange, as GasGas states that only the 300 should have Ducati electrics for that year), so these parts were as rare as hen's teeth. I had to wait 6 months for the parts to show up. During the waiting period I did some maintenance on the bike: changed the piston, linkage bearings, cleaned the carb etc. The parts delivering Gods decided to have mercy on me and sent me the ordered parts, and to my total joy, after fitting the new CDI, the bike started 3rd kick. Now to my real troubles. Yesterday I went for a ride and managed only 250 m riding. It cut out and died again. But this time it has spark (with every kick). It also has a ton of compression when spinning the back wheel in 6th. I took the carb apart again and checked the jets; 36 pilot and 118 main, no clogs, set the float height to 16 mm (with the carb upside-down). Still won't start. What's causing my issue? The carb is not overflowing, there is compression (I had a doubt as it's not too hard to kick over, so I pulled the exhaust to check if the rings were stuck, but they seem fine; they have a spring feeling when pushing on them through the exhaust port), and there's spark. I also checked the flywheel. It looks a little bit rusty in a few places, but it shouldn't be causing the problem, as there is spark. What about the ignition timing? I checked and the key is in place. Please help!