My 2006 Yamaha Roadstar has a big, air cooled, 1700cc push rod v-twin, with flat tappet cams and a wet clutch that shares oil with the engine via a semi dry sump system. As such it requires high ZDDP oils designed for a wet clutch. [so no Rotella] I believe the minimum requirement is 1200 ppm ZDDP, but I prefer to stick with 1400 minimum, so I run Mobil 1 V-twin 20w50.
Earlier this year, I replaced my hydraulic lifters, because they were sticking at start up and taking increasingly longer to fully pump up. [Like 5 mins.] After hearing all the horror stories about destroying old cams with new lifters, I made sure to lube up the lobes and lifter faces with high ZDDP assembly lube and added some Lucas High ZDDP Break in Additive to the oil as well, which should put my oil well north of 2000-2500 ppm ZDDP.
I'd *just* changed the oil a couple hundred miles before installing the new lifters, and with a new filter and 4 quarts of Mobil 1 V-Twin running me $50, I just kept the oil with the extra ZDDP. I've put on about 2500 miles since and I'm wondering if there's any potential damage this could cause.
On a side note: I did have a considerable amount of carbon build up on the head and piston face, so I cleaned them both and put everything back together. As a preventative measure, to keep the carbon build up from returning, a couple days ago I re-routed my crank case breather from the intake to an external filter that vents to atmosphere. It's located down by my shifter, but after my first ride this weekend with the new breather, the smell was almost nauseating. The oil has a rancid smell that's difficult to describe. [not like gasoline] Can this be due to the Lucas ZDDP additive or some other issue that's possibly causing oxidation, and if so, what? I've also noticed my clutch occasionally slipping in 2nd gear under hard accel, so I'm probably due for a new clutch soon. Could this have anything to do with it? It's not the typical burnt smell of a clutch overheating.
Any and all input is appreciated.
Regards,
R_R
[Roadstar_Rider]
Earlier this year, I replaced my hydraulic lifters, because they were sticking at start up and taking increasingly longer to fully pump up. [Like 5 mins.] After hearing all the horror stories about destroying old cams with new lifters, I made sure to lube up the lobes and lifter faces with high ZDDP assembly lube and added some Lucas High ZDDP Break in Additive to the oil as well, which should put my oil well north of 2000-2500 ppm ZDDP.
I'd *just* changed the oil a couple hundred miles before installing the new lifters, and with a new filter and 4 quarts of Mobil 1 V-Twin running me $50, I just kept the oil with the extra ZDDP. I've put on about 2500 miles since and I'm wondering if there's any potential damage this could cause.
On a side note: I did have a considerable amount of carbon build up on the head and piston face, so I cleaned them both and put everything back together. As a preventative measure, to keep the carbon build up from returning, a couple days ago I re-routed my crank case breather from the intake to an external filter that vents to atmosphere. It's located down by my shifter, but after my first ride this weekend with the new breather, the smell was almost nauseating. The oil has a rancid smell that's difficult to describe. [not like gasoline] Can this be due to the Lucas ZDDP additive or some other issue that's possibly causing oxidation, and if so, what? I've also noticed my clutch occasionally slipping in 2nd gear under hard accel, so I'm probably due for a new clutch soon. Could this have anything to do with it? It's not the typical burnt smell of a clutch overheating.
Any and all input is appreciated.
Regards,
R_R
[Roadstar_Rider]
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