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BTW, I'm new to two strokes, haven't had one since I was a kid and dad did all the work. Ok, so I've searched and not found what I'm looking for so figured I'd ask here. Recently picked up a 2000 yz250 that supposedly has a 295 or 300 big bore kit. It ran strong so I didn't fret too much over the little things. Paid $1500 and took it home. Drained the gear oil and it looked a bit odd to me. I refilled with Rotella, ran it for about 15 or so minutes out back. Drained and it looked the same. ? Could this be water getting into the oil? Read somewhere that it should look like this but seems odd. Any help would be appreciated!

So I haven't even broke this bike in yet. I have been way to busy to ride it. So I cleaned the garage out Thursday and moved the bike I come out today to watch some football and noticed a few drops under the bike. I can't seem to figure out where it's coming from. I personally don't even think I should try it's BN never rode. What's your thoughts? Thanks Jeramy

Hey yall so I was watching youtube and stumbled across video by FortNine on his chain lube testing. Well the gear oil looks pretty promising and as I have a 2 stroke and I always have honda pro hp gear oil laying around, is that the ultimate answer just to use wd40 to clean and gear oil to lube the chain after every ride? It seems to do excellent in rust area and friction prevention but it attracts a lot dirt.... What do yall think? or just use bicycle chain lube video by project farm

So I bought a used 2014 Honda CRF450R for my son. Replaced engine oil and gear oil before our first ride, only to discover gear oil was milky and dark grey coming out of the bike. Engine oil was dirty, but fine. Called local shop to ask if the milky grey transmission oil was evidence of coolant in the oil, and they said maybe: change the oil out, go ride for a few hours, and empty oil out again. If oil is just a little grey colored after riding, that can be OK: the steel clutch plates can turn the gear oil a bit grey in color. If it's milky again, they said I've got coolant in the oil -- and first suspect is water pump shaft/bearings/seal. SO, I follow their advice, used Honda oils, and we go for a first ride. 80 degree weather, and got into some gnarly rocks in a canyon (unexpected) at about the two hour mark. Slow speed 1st gear stuff, lots of clutch work to get through some tough sections with boulders, and my son stops and says that clutch seems grabby and he's having a tough time. I get on the bike myself to get it through the section, and see if in fact it's not behaving well, and sure enough the clutch is kinda grabby and seems a little finicky as I try to get it out. Hmmm. Once out, I stop and inspect: bike is dripping same grey colored milky oil through the tranny breather tube onto the dirt. Bike is hot, which could be why clutch is acting up. However, nothing coming out of water pump weep hole, and no coolant drip. We decide to let the bikes cool down, and after enough time I open radiator cap and sure enough the coolant is low, not even showing coolant at top of fins. I assume there's a coolant leak mixing into the transmission oil, so we ease the bikes back to the trailer and head home. Here's where it gets interesting. Tonite I drained both the engine oil and transmission oil. Both looked completely fine, fresh and barely dirty. No milky grey color gear oil, not milky at all. Inspected clutch plates, they look fine too. I then pulled the water pump cover and the propeller off, and while I didn't pull the engine case off and inspect the water pump shaft (because kick start lever was frozen on and I couldn't get off), shaft did not appear loose to me. It could be leaking coolant through seals, I suppose - but if it was, the gear oil would be milky again (right?)... which it wasn't. So - I've concluded, correctly or incorrectly, that the milky oil from the engine case breather tube (emptying out below swing arm) that was dropping milky oil on the ground in the canyon was residue leftover from old oil getting pushed through the tube. I've assumed this because new tranny oil was clean and not milky or grey colored. I'm not sure where else it would have come from, since both engine oil and transmission oil were like new... but I'm scratching my head as to where the coolant went, why the loss. I checked the coolant level before we rode, and it was just above the radiator fins before we started, but was below fins after our ride. Anyone have suggestions or ideas? I'm not sure where to go from here... thanks for any advice you can offer. (I'm not much of a mechanic, pretty inexperienced, and maybe the problem is obvious to those with more experience).

2006 YZ 250.. The manual calls for 10w30 (yamalube 4 stroke oil), can I use 10w50 (Motul semi sythetic 4 stroke oil) ?? I bought the bike, want to change the gear oil before I ride tomorrow but all I have at the moment is the Motul 10w50 semi synth. Is that oil going to be too thick compared to the 10w30 or will it be fine.. Thanks

Hi guys, I have a 2014 Husqvarna te300, and I’ve noticed that when filling the bike back up with gear oil it only seems to take about 650ml before oil starts coming from the drain plug?! Just wondering why this is considering the Manuel says 800ml. And yes I have my bike flat on a bike stand and yes all the old oil is out I left the drain bolt out over night as I installed a helicoil kit for the drain bolt. Any positive input would be much appreciated, should I just do as the Manuel says about the 800ml or also do what the Manuel says about the oil check bolt? ?