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Re: what oil should i have in yz 125 2 stroke
Alot of the motor oils for cars have additives that if used in mororcycle clutches will cause the clutch to slip. DO NOT USE OIL that is NOT recommended for cars. Maxima, golden spectro, amsoil, Yamalube, are fine....Stay away from the penzoil and such
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Mix to 32:1 and jet to get the plug to burn chocolate brown...
Golden spectro is good
Yamaha makes an oil that's not bad
Honda oil also is good
(All of these are specific two stroke mix oil)
You have a 2 stroke dirt bike, off road only, without oil injection. Get a gallon of 2 stroke oil, get the mix from the owners manual or the dealer, should be about 1 pint per tank? Or 4 oz per gallon. It might be more. Don't try to get away with burning motor oil in there, it won't work, it will overheat the engine and could do some damage. Hope this helps.
NGK BR9EG is the stock plug for your bike. You are one heat range hotter already. I suggest you go to a BR8EG to keep you in the racing plug style but one range hotter than stock. I question what 2 stroke engine oil you are using. Stick with Yamalube 2 stroke oil and you should be okay. If you are using standard motor oil like you have in the gearbox then the fouling is definitely the oil.
The problem did not start untill the 10w30 Honda transmission oil went in. It isn't the 10w30 thats the problem. It's the TRANSMISSION oil as opposed to MOTOR oil. There is a difference. As I said before, the swelling may or may not go away.
Nothing significant, don't worry about it. You do NOT want oil marked EC, signifying energy conservation. Such oil will cause the clutch plates to slip and premature clutch wear. If the oil you put in does say EC on the small round type seal simply drain it out and put in the correct oil. Not critical but the sooner the better.