I have a 49cc 4 stroke with a 4 speed on my mini dirt bike, same motor as the PB's are coming with now which is a copy of a xr50 motor. When it is cold outside like in the 30's and you start it up, it can pump the oil out of the overflow tube and you can have a big oil slick under your bike. The oil that comes in these motors is so thick it just pumps it out of the overflow tube. I changed my oil to Castrol motorcycle oil and I have had no other problems. DO NOT USE regular motor oil use motorcycle oil ONLY. It will hold a little less than a quart of oil in the motor and it does not take the motor long to pump out a quart of oil out of the overflow tube. Hope this info will help someone. Good luck
Ah bro,,,,,,,,,,,,,,,,,,,,,,,,,,your suppose to drain the oil its shipped with. Its not made to run on. And on top of that all oil is thicker when cold as a biatch outside. Run straight 30. Air cooled motors are suppose to run a straight weight not multi viscosity.
Viscosity is a measure of the "flowability" of an oil. More specifically, it is the property of an oil to develop and maintain a certain amount of shearing stress dependent on flow, and then to offer continued resistance to flow. Thicker oils generally have a higher viscosity, and thinner oils a lower viscosity. This is the most important property for an engine. An oil with too low a viscosity can shear and lose film strength at high temperatures. An oil with too high a viscosity may not pump to the proper parts at low temperatures and the film may tear at high rpm.
In laymans terms" use the correct viscosity oil not just 30"
Viscosity is a measure of the "flowability" of an oil. More specifically, it is the property of an oil to develop and maintain a certain amount of shearing stress dependent on flow, and then to offer continued resistance to flow. Thicker oils generally have a higher viscosity, and thinner oils a lower viscosity. This is the most important property for an engine. An oil with too low a viscosity can shear and lose film strength at high temperatures. An oil with too high a viscosity may not pump to the proper parts at low temperatures and the film may tear at high rpm.
In laymans terms" use the correct viscosity oil not just 30"
You have to run thinn oil down there in southern Cali.?
Troy
viscosity is the "inability" of oil to flow. In other words you should be using 30w!
I don`t care what temp your in unless northern Alaska where brake fluid is used for crankcase of such a small motor. Even in an air cooled engine such as these a bit of 2 cycle should still be used since the motor is most always at WOT. 30w in the crankcase.
30w is outdated oil. Great oil for cars in the 1960's.
Pro-Honda GN4 10W40
Honda set the standard for motorcycle oil when it introduced GN4 in 1975. We selected the highest-quality base stocks, and created an additive package specifically designed for the unique requirements of motorcycle engines. We still do. Constant testing and development has given today's GN4 even better shear resistance, viscosity stability and cleanliness to meet the requirements and stresses of a new era of engine technology.
Yamalube® 4 10W-30
Yamalube 4 was designed to provide Yamaha owners with precision-blended oil for their 4-stroke engines. Yamaha chooses only the finest lubricants in formulating these oils. Yamalube 4 also contains more performance additives than found in typical oils. These additives fight corrosion, varnish, and wear. As a result, Yamalube 4 provides low friction, high performance, and longer engine life. All Yamalube 4 formulas meet or exceed all API certifications as recommended for use in Yamaha engines.
Kawasaki's 4-cycle oil is specially blended for high-performance engines.
• Exceeds all manufacturer's warranty requirements
• Compounded to maintain viscosity at high temperature to provide maximum lubrication under speed, load, and temperature
• Contains high levels of detergent-dispersant, anti-wear, anti-sludge, varnish and rust preventive additives
• A special additive, not present in automotive type oils, provides maximum life and performance for motorcycle clutches and transmissions
I checked each site NONE sell 30w oil because it is outdated oil. 30w is great for lawnmowers used in the WARM times of the year.
Like I said choose the correct viscosity oil for your region.
4-Cycle Motorcycle Engine Oil
Quaker State® Small Engine 4-Cycle Motorcycle Oil is formulated with high-quality lubricating stocks and additives to provide high-temperature protection. High film-strength agents protect against wear and scuffing of pistons, rings, cylinder walls and gearboxes. Non-friction modified for excellent performance in wet-clutch gearbox transmissions. Available in SAE 10W-40 and 20W-50 grades for all-temperature protection (API SG, SH, SJ).
HD 30 4-Cycle Engine Oil
Quaker State® HD 30 4-Cycle Engine Oil is a heavy-duty, high detergent engine oil formulated for use in hot-running 4-cycle engines. Provides outstanding protection against wear, rust, corrosion and oxidation under severe service conditions. Perfect for engines, lawn tractors and other lawn and garden equipment where 4-cycle SAE 30 engine oils are recommended (API SL SJ, SH
Hoss it has been a Great debate on 4 stroke motorcycle oil. I now know more about 4 stroke oil than ever before. I know the members will be able to make a choice in which type of oil to put in their 4 stroke bikes. Good luck all and I hope this post will help someone.
Belray is definitely my choice I used it in all of my dirtbikes since I got my first one and it has worked without trouble from riding for 13 hours straight. I'll continue to use it in my X7 4t.
Ah bro,,,,,,,,,,,,,,,,,,,,,,,,,,your suppose to drain the oil its shipped with. Its not made to run on. And on top of that all oil is thicker when cold as a biatch outside. Run straight 30. Air cooled motors are suppose to run a straight weight not multi viscosity.
30 degrees isn't cold as a biatch. Try -50 degrees sometime then tell me whats cold.
Just to pass on some first hand info. YAMALUBE sucks. The entire product line. I use to use it in my YZ. Learned quick about BelRay.
I have used Yama R and the newer Yama R2 for over a decade without any problems. It is a semi-synthetic based oil that works excellent for me. I have had no problems with gumming up of the power valve or any negative results.
I now use Klotz Techniplate for it smells better and I get it at cost! It is also a senthitic blend with 20% castor oil in it! R-50 is Klots's 100% synthetic oil!
If mixed properly and respect is used when warming up a 2 stroke engine any good 2 cycle oil will work fine! What is good? Not the stuff at the local gas station, a motorcycle manufactures oil or an aftermarket oil made for racing applications! Just my knowledge that I am sharing with everyone. I hope it helps.
Troy
