Recent content by Roadstar_RIder

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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Just thought I'd post this link here in case someone else is interested: https://www.onallcylinders.com/2018...h-off-the-shelf-motor-oil-to-save-money/
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    Why manufacturer would only recommends Semi Synthetic

    It's highly unlikely this is related, however... Back in my German auto parts days, when synths started showing up on the scene, a lot of guys with older, high mileage cars, thinks 70s and 80s Porsches and BMWs, started having problems with leaking seals, where they had none before. It was...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Originally Posted by BusyLittleShop Originally Posted by Bonz 50 (M1 v twin), 40 (4T racing), 50 (Mystic JT8), 40 (Valvoline ATV), 50 (Castrol MC Dino), 40 (T5 syn blend). Bonz is this version correct??? While we're at it, that image is a little fuzzy, is this correct? 50 (M1 v twin...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Originally Posted by FastGame Well your cruiser is making torque at much lower RPM than the high revving bikes, you are living more in the torque band. Your 84.3 HP (62 kW) @ 4400 rpm is pretty good IMO. Dodge Hellcat makes a bunch of HP, it sure isn't going to pull a load like a lower HP...
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    Which Rotella for my bike?

    Originally Posted by BusyLittleShop All 3 choices will meet and exceed your mileage expectations only the freer flowing 30 grade will lower your engines operating temp because oil drag real... Lower operating temps are *definitely* a good thing, cuz some days my thighs feel like the hotdogs...
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    Which Rotella for my bike?

    Originally Posted by Lolvoguy If you feel better about running Mobil 1 V-Twin 20w50, then stick with it. Clearly no amount of discussion is enough for us to convince you otherwise from the last thread you started, the to abundance of info already posted on this forum. Wait, what? It's...
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    Which Rotella for my bike?

    This is for the Yamaha Roadstar 1700cc air cooled V-Twin and I have three choices available to me, but none are ideal. So which would you use? First, due to the flat tappet cams, I need an oil with at least 1200 PPM ZDDP. Also, I'd Ideally like a JASO rated oil for the wet clutch that shares...
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    BMW (Toyota Supra) B58 Engine Teardown Video

    As someone who's worked on many BMWs this video makes me cringe. I guess you're supposed to toss these things in the crusher after the warranty is up.
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Originally Posted by FastGame Yamaha Roadstar = 84.3 HP (62 kW) @ 4400 rpm, Torque 135 Nm (99.57 lb-ft) @ 3750 Kawasaki Concours 14 = 158 HP @ 8,800 rpm, Torque 136 Nâ‹…m (100 lbfâ‹…ft) @ 6,200 rpm Kawasaki Ninja ZX 14R = 197 HP @ 10000 rpm, Torque 158.2 Nm (116.5 lb-ft) @ 7500 rpm Both...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Unfortunately they stopped making these a few years ago, and there's no one left at Yamaha Corporate who knows anything about them. I called them on a number of occasions to no avail. And even worse, since there are so few in the wild, and so different compared to other Yamahas, the dealers...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Good info Bonz, thx for clarifying that. [Nice bike BTW] I found my other local Oreilly's had T6 5w40 for $22.99 [plus a $7 rebate]. Any problems with that over the 15w40 T6? [or 5w40 T5] It does show JASO rated on the bottle, which makes me feel a little better, and from what I understand...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Thanks for all the info guys. And thanks BLS for the oil report on the 1800, but to be pedantic, that says 1800 V-twin Goldwing, and there is no such beast. It's either a VTX 1800 V-twin or a Goldwing 1800 flat six... But I'm just busting your cajonies. Thanks again. Right now O'Reilly Auto...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    BTW... Which Rotella are you referring to the 15w40? And my Reason for concern is the Roadstar [R*] clutch slip due to weakening stock spring is as certain as death and taxes. I've owned two and had to replace the clutch spring in both at around 25-30k miles. I also know of countless of other...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Originally Posted by BusyLittleShop Originally Posted by Roadstar_RIder Not designed for wet clutch, and with a motor as torquey as the Roadstar, clutch slippage is a real issue. The holy trinity of science is 1)Reason 2)Observation 3)Experience... employing those tools we observe that the...
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    Can too much ZDDP be a bad thing for a flat tappet motor?

    Originally Posted by Lolvoguy What's wrong with Rotella?! Not designed for wet clutch, and with a motor as torquey as the Roadstar, clutch slippage is a real issue. The stock clutch springs are notoriously too weak and crap out at about 15-25k miles. [I've already had to replace mine. I used...
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