brooksie

Well I drained the fuel tank and carb and refilled with fresh fuel from the nearest Shell Station, which isn't that near really. Added the recommended amount of Amsoil Octane Booster and went out for a play. Much, much better! Guess I'll just have to be more fussy where I get my fuel from. Thanks very much for yout time Jon. Much appreciated. On another note,I have had to bleed the clutch every two or three rides. Once it's bled, it's fine again. I had a good look at the clutch pipe, but there's no obvious signs of a leak. But the lower part is rather dirty, so it's difficult to tell. Is there any seals inside the clutch cover that could be leaking perhaps? The bike had been stood for quite some time until I bought it. Thought if I was going to order a new pipe, might as well get seals and a gasket and do the whole thing all at the same time. Cheers

Thanks for the reply. I know the previous owner. He's a pretty good trials rider and very fastidious regarding the maintenance of his bikes. As mentioned, the bike is practically new having had very little use. It hadn't even been truely dirty until I got it! He used Motul 900 full synthetic mixed at 80:1, changed the trans fluid after every ride. I'm doubtful regarding the build up of carbon because of the low running hours, and cleanliness of modern oils. The spark plug for example is the original one, and it's like new. There's not a trace of carbon on it. The bike has plenty of grunt off the bottom end and it doesn't fade even when it starts to pink. But I'll take your advice and remove the exhaust to have a look. Perhaps I got a really crappy gallon of fuel from the gas station? Not many people use premium, so it could have been sitting in the pipes for a while. Just wondering if it might need the timing retarding a bit? Cheers

Dellorto PHBL26 Main Jet #118 Pilot Jet #42 Inter #60 Slide #60 Needle set on highest position (lowest clip) The carb was as clean as could be when I stripped it to findout what size the jets were. Usually operating at 600ft ASL. Cheers

Hey folks, Sorry in advance if there's a post covering this. i just spent the past hour trying to find it! Great site though. Anyway, just bought a very lightly used Gas Gas 300 TXT 07', less than twenty hours use. Not had a trials bike for a few years but absoultely loving it! I've noticed though, when climbing steep hills the engine will start to "pink" as the load increases. I'm using premium fuel mixed at 70:1 with a touch of octane booster, and also tried a harder plug. But it didn't make the slightest bit of difference. I've read a few posts regarding "pinking", but it seems to be more of a problem on the over run, which is not my problem. I guess it's time to order some bigger main jets, but would appreciate members advice/experience of the same. Cheers