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Post by paulpaul on Sept 2, 2011 16:26:40 GMT -6
Hope you find out what is wrong. I'm having the same problem. We were riding at 65 & 70 all of a sudden it slowed to 45mph. We were 20 miles from home it runs great , idles grate , cranks grate. I'm waiting on parts. Hope to have it back running next week. I did notice when i finally lined all the timing marks up. The one on the cam side and the one by the oil check. The valves were set way loose or had loosen up. I will watch to see what you find. I will post if my is repaired this next week. If anyone knows what the roketa Yamaha clone compression should be . I was reading above the info i have says 26 to 28 setting the plug. If i getting the right info , 30 could change the timing some. I don't know if it would be enough to make a difference. Thanks Paul
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Post by paulpaul on Sept 1, 2011 5:09:28 GMT -6
This is something our government did not tell you about oil. The off the shelf oil are not good for flat tappet motor. ZDDP Engine Oil - The Zinc Factor Tweet | Because the EPA wants a minimum 100,000-mile lifespan from catalytic converters, they need a fighting chance at survival. Zinc in the oil undermines that survival. That's why both the automakers and Washington decided zinc had to be eliminated from engine oil. Without zinc in the oil, wear for vintage engines with flat tappet cams increases exponentially. In fact, it is alarming how quickly it happens and how much damage it does. Zinc is crucial not just for cold start-up, but extreme conditions that make heavy-duty engine oils necessary for reliable operation. There's no magic in heavy-duty engine oil, just higher levels of ZDDP to help reduce wear. The first thing you want to know about engine oil is if it has an "SM" rating, which indicates greatly reduced or zero zinc levels, which makes it harmful to your classic Mustang's engine. Do not use engine oil with the "SM" rating. Or, if you're going to use engine oil with the "SM" rating, use a zinc additive that will maintain proper ZDDP levels. Front and center for this issue is California, which wants all zinc eliminated from engine oil. Regardless of what government and industry mandate for engine oil, it is up to you to ensure sufficient zinc levels are maintained when you change or add oil. ZDDP is crucial to engine wear and break-in issues because so many things need to happen when you fire an engine for the first time. When you fire a vintage engine with flat tappets for the first time and run it at 2,500 rpm for 30 minutes, you are work-hardening the cam lobes to ensure long life. Cam lobes not only move the lifters, pushrods, and valves, they also spin the lifters in their bores for proper function. The lifter and lobe must have sufficient traction for spinning to happen. This is why you don't want to run synthetic oil or friction-reducing additive during break-in. ZDDP helps lifter/lobe traction. It also works into your engine's hardest working parts Read more: .mustangmonthly.com/techarticles/mump_0907_zddp_zinc_additive_engine_oil/viewall.html#ixzz1WhGnlwtf" rel="nofollow" target="_blank"> .mustangmonthly.com/techarticles/mump_0907_zddp_zinc_additive_engine_oil/viewall.html#ixzz1WhGnlwtf I would not know this if someone had not sent a article about this. This is not the only article out there. I went under gov rating for oil and in the ratings it said ,do not use Sm rated oils in flat tappet engines. If I'm wrong please send me an article that proves that. Most people do mot know they have changed all oils even oil we use for years they have changed. the new oils are only good for roller tappet engines. Not trying to be a smart A. I realize I'm not always right. But if this is true and i believe it to be . You are hurting your motors and shorting there life. Thanks JR |
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Post by paulpaul on Aug 31, 2011 17:43:48 GMT -6
I told the truth about the oil. If you would take the time to check it out you would not be leaving messages like this one.
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Post by paulpaul on Aug 30, 2011 18:04:38 GMT -6
I use am soil 10/40 high Zinc. In 2004 our Government told the car industry that the catalytic converter had to last 100,000 miles. Now they say it has to last 150,000 miles. The car manufactures got together with the oil company's an decided the only way they could make that happen was to take the zinc & phosphorus out of oil. That is the shear factor. That means any flat tappet engine can and will wear the cam shaft out with in 15 to 20 thousand miles . If you go to government ratings for oil they tell you about this there. Mobile 1 and all oils with the exception of some racing oil are now not good for scooters with flat tappet engines. You can use an additive that puts the zinc and phosphorus back in the oil or buy am soil high zinc. There are a few other oils that are this way but you cant buy them at walmart. Thanks Paul
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