Recent content by grachal

Hello, I have new problems with my 98 EC250. After repairing and afterwards leaktesting my gastank with water, I ran the bike and everything was fine. After about 10 kilometres it did not want to rev out fully, and the "reachable" RPM then got less and less until it died and left me stranded. As...

Thank you very much @SS109. But after some more reading in the forums, I now would like to have a 2010/2011 fueltank. You happen to have this one also? Very hard to find anything in decent condition.

2010/2011 fuel tank Hey, looking for a 2010/2011 fueltank - best case in very good or new condition. Prize doesn't matter, I need it desperately. Biggest hurdle will be, that I need it shipped to germany! Thanks

Thanks for your suggestion. I checked the impeller and it is good. Flushed the radiators and it showed that it was not as bad as it looked before. Clear water with some dark sediment in it. Maybe some Oxidation residue from the radiators (cheap chinese ones) or the engine itself? I refilled the...

One more question. Bike ran fine the last 400 kilometers, but I noticed, that my coolant turned black. It looks like dissolved aluminium particles in there if i would need to guess. Any idea what this comes from? I have no water in the crankcase or in the oil. But the water level got slightly...

I did not find anything wrong and I do not feel like pulling the motor back apart. I'll just send it till she blows, lets see :rolleyes:

I did not have the possibility to properly check if the crank is still true with a gauge, but if it was not, you would expect it to slightly bind when turning it by hand in the assembled case, right? The journals were polished, as suggested. Thank you for the possible main bearing failures. I...

So today I slapt it back together, and took the bike for a quick spin. Runs like it used to, but I have a bad feeling about the motor. When driving I hear a slight whine. Comparable to what a lengthened timing chain would sound like. At a standstill I can't hear it, and I can't tell where it...

With a gastorch and a puller I got the bearing out of the case. Removing it from the crank took raw violence tbh. The bearings cage is broken in 3 spots, parts of it were completely broken of. I think it got very hot and shrunk on the crank very good. So I guess i will just replace both crank...

Thanks guys, today I disassembled the engine, but got stuck at the left main bearing. It does not want to come out of the case, or the crank out of it either. It is also the faulty bearing, it feels very rough and has lots of play. Tomorrow I'll build a more beafy puller, as the 3 M5 threads in...

Today I pulled the top end, and to my surprise: cylinder and piston are fine. I now discovered, that at least one main bearing is damaged. Crank has no side to side or up and down Play, but when you turn the motor over, you can feel the individual balls grinding in the bearing rings. So that...

Short update: just after 53 kilometers I managed to seize her again. The motor started to develop a high pitch squealing noise, but ran great so I tried to bring her home unter its own power. 200 meters further, engine shut off with no compression. Now it starts back up, but doesnt sound all...

Thank you so much guys, finally she is up and running again! The carburetor was the issue. Even tho I tested the float by blowing into the fuel line and actuating it, it seemed to get stuck once there was fuel in the carb. Had it all apart again, and put it in a ultrasonic cleaner. She pulls...

@Jacobs 'Berg: Ok, so today I removed the crankcase drain bolt, but no coolant came out, just fuel. I also removed the carb a few times, but did not find anything. The jets are clear, no debris or oil residue. The float valve works fine. I also tried cranking it without the drain bolt, and it...

Thanks guys! @Biff: The waterpump impeller was fine. I replaced the impeller, the drive gear and all the seals last year, and they are still good. @Zman: Crank seals, of course are new, genuine viton ones. No rag in the airbox, so it should get sufficient air. Spark outside the engine is very...