avas.eduard

Thank you guys for the input! @d2w checked the airbox, checked the filter, checked the boot to the carburetor and to the motor, everything is nice and clean; yes, I have fuel, I took the fuel tank off the bike and the cock is working, fuel flows; checked the fuel, it has oil in it, i add 200 ml to a 10 liter bottle, that's a 50:1 mix ratio, I use BelRay H1R; I have good spark, tried with the old spark plug and tried with a new one, it starts identically hard and it has the same behaviour; can't check compression, I don't have the tool that I need, I'll borrow one from a friend and write you again; took the coolant off and I had a good quantity (I think around 500 ml, haven't measured it though) and the cooler works @lineaway & @section swept took the cap off the engine, pictures attached; before I took the pictures I noticed that the piston top and the cap inside had a black coating, pretty tick, which I took off using a brass brush, but you can see that some of it still remained - is this normal, what is that coating? I took photos of the cylinder from all the angles that I could, I hope they help; please tell me i I have to go further and take the cylinder off to check the piston and rings. I would like to add that I water flood the engine several times, it was wet outside and I didn't know why it would stop then I read on the forum that this bike has a problem with water in the airbox and I found the air filter wet so I stopped riding it in wet, but I think the engine has been flooded at least 10 times in 2 rides before I realized where the problem is coming from. And if it helps, the day what I wrote in the first message happened it was very hot outside, I believe around 30 degrees Celsius and I rode it for about 8 km in 6th gear high RPM, then let it go for a while (to avoid seizure), then high RPM again, etc. I don't know how a piston seizure looks like, but the engine did not stop, it just lost almost all its power, dropped idle RPM, made less smoke and different color. Thank you again for your help, I have no other trial riders in my area. ?

Hello everybody! I bought a 2005 Gas Gas TXT 280 PRO a few months ago t develop better technique for my enduro riding. I believe I used for less than 30 hours and at my last ride while riding on the street about 10 km (6 miles) to the spot I wanted to train, I felt a loss of power, the smoke color changed and less smoke came out of the exhaust. After I pulled over I also noticed that the bike is having difficulties keeping the idle, the RPM was lower. It also didn't rev as it should, it felt very lazy, it had no gut. I turned the engine off, let it cool down and tried to start it, but after way too many kicks it still refused to start so knowing that something is wrong (it usually started very quick), I took it home. Few days after that I tried to start it again and after a very tiring number of kicks it started and it had the same behaviour - hard to keep the idle, very low power, very little smoke, different smoke color. I know I have to start working on it but I don't really have an idea where to start from, why is it doing this, what might be damaged, worn, etc.? Thanks for the input!