![]() 2 or 4 stroke, don't get ripped off i.e Hog Oil, Yamalube, Evenrude, etc. Don't be fooled, none of the manufacturers own oil refineries. At that time Imperial (Esso) oil was less than 1/2 the price of Yamalube. I once brought a bottle of Yamalube and saw the name Imperial on the bottom. Most OEM brand 2 stroke oils are made by a big name company and rebranded. You can run 100:1 oil ratios if you want, but if you drive at any thing less than an idle you can expect to be rebuilding your crankshaft sooner than most Took the seat off my KZ750E and found out. Mainly it works by accumulating in the crankcase and then being whipped around by the crankshaft HONDA ATC 70 PARTS MANUAL HONDA ATC 70 PARTS FULL HONDA ATC 70 PARTS FREE. The oil in the fuel does not lubricate the parts much when emulsified with gas. Moderm 2 stroke engines that recomend 50:1 ratios are designed a little differently that old engines and are better at distributing oil where it is needed The upper con rod bearing suffers first in an oil deprived state if you are perfectly jetted for 50:1 and want to use 20:1 you need to jet up to avoid seizing your engine. Too much oil actualy causes a lean condition as its presence displaces fuel in a given space. 1982 ATC 250R 1984 ATC 250R 1986 ATC 250R 1988 and 89 TRX 250R. Oil will not foul a plug, being too rich or using old fuel will Or use a Hot Air Gun or Dryer to soften the. As stated you dont need the carb machined, just use a new TRX250R intake boot and a little grease. It rips now 1985 ATC 250R PSI Racing pipe and porting stock motor built by BHP. Too much oil does NOT make your engine smoke, been too rich does 1986 250r Atc,carb help please If this is your first visit to 3WHeeLeR WoRLD, please take a moment and look around. 1986 ATC 250R built to trail ride Billet,chrome completly redone everything and LED built 330 motor. A study years back showed 26:1 was the best for max power in a CR 250 Boyesen also makes a specific Rad valve for ATC/TRX250R, as well as a larger rubber coupler to expande the 36-41 MM carbs.all instock at BDT Racing. Your engine actualy makes more power with more oil. The Rad valve on an LT works good, on a 250R not as good as the VForce3's. I would not be scared to run 50:1 in a pinch, but not wide open for any length of time If you do the reasearch you'll find that there are a lot of opinions out there about ratios: Below are a few things about gas and oil that I belive to be true after 31 years of using them: I run 32:1 on the trails and 25:1 if I'm racing a 2 stroke to the max like at a drag strip. ![]()
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