2strokesrock said:If it was a lean siezure adding more oil to the gas will not help, you should beable to raise the needle in the slide a clip or two and that will make it richer.
When a bike is running lean it is getting too much air and not enough gas to lubercate properly, by raiseing the needle it allows more gas into the crankcase resulting in better lubercation.
jason33 said:really depends on what its lean on , air fuel or oil,gas doesnt lubricate oil does, a wet plug is fuel fouled, oily is black ,and nasty,a bad plug can look either though sometimes
(rule no1)---NEVER LET ANYONE ELSE MIX YOUR FUEL,AND OIL!
no2 there are "smokeless oils out now"
sorry for your problem , i honestly dont know, i wasnt there or am looking at parts,if it was a detonation thing i think it would have melted a hole in the piston,and burnt the electrode off of the plug
(possibly too lean on the oil)
rmc_olderthandirt said:How long has it been since the last top end rebuild?
How long had you been running since the last fill up before it failed?
How about more details, like how hard you were riding. Were you in 5th gear pinned? Or just putting?
Like Jason said, I would be very careful about who mixed my gas. Preferably do it yourself. And you shouldn't be pouring oil directly into the gas tank, the mixing should take place in a can before you put it in the tank. If they added straight gas to the tank, then poured in the oil it would be possible that a layer of straight gas settled to the bottom of the tank and didn't mix with any oil. This could explain it if the failure was right away. I would expect the first set of whoops to mix things up well enough so if the failure was well into the ride it probably wasn't that.
IndyMX said:Again, for the hundred millionth time, LEAN / RICH only refer to the FUEL/AIR mix and have nothing whatsoever to do with the amount of premix oil in your fuel.
This misinformation has been spread around here way too much.
Hey Rod a couple of people in this area said the same thing, that it was proboly time for a topend since it was the original, Thank-you for your inputrmc_olderthandirt said:I would drain the gas out of the tank, put some in a clear jar and take a look at it. Does it look like it has the proper amount of oil in it?
If you are reasonably sure that the oil was mixed properly then I would assume that the seize was due to the long time since the last top end rebuild. If I understood what you said the engine has never had a top end rebuild until now. That would be way beyond the recommend interval for changing out the piston.
Rod
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