MustashMike
Scoot Member
Still alive & well
Posts: 89 
Location: Indianapolis
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Post by MustashMike on May 4, 2019 9:45:09 GMT -5
The BUNNY has a kit that meets my needs except removing the stock oil pump (SEE BELOW)
Polini Sport 70
This iron cylinder has the angled Minarelli Style exhaust port but doesn't appear to be machined for the CPI/Keeway/Vento stock oil pump. It could be required to remove it in this case.
Can I grind the casting to accommodate the factory oil pump? Has anyone done it?
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Post by oldgeek on May 4, 2019 10:02:43 GMT -5
Certainly
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on May 4, 2019 10:12:31 GMT -5
I haven't done this myself but would have no hesitation doing so. Grind on.
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Post by ThomasTPFL on May 4, 2019 10:13:31 GMT -5
Or throw away the factory pump and premix.
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on May 4, 2019 10:18:46 GMT -5
Or throw away the factory pump and premix. That's just a lot of work. |
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Post by ThomasTPFL on May 4, 2019 10:36:40 GMT -5
Or throw away the factory pump and premix. That's just a lot of work. I don’t trust factory pumps with oversized cylinders. They meter volume/rpm, not volume/volume. Once you’ve increased your bike’s fuel consumption with a kit/carb/pipe how do you know it’s pumping enough oil? Some kits, Polini Corsa for one, ask for 3% mix. How do you adjust your factory pump for that? I’ve seized one engine due to oil starvation and don’t want to risk it again. Pouring a spot of oil in when I fill up isn’t that big a deal. It'd be an expensive doohickey I’m sure but someone should come up with a dual fuel/oil pump that meters one to the other. |
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Post by ThaiGyro on May 4, 2019 10:38:22 GMT -5
Haha! Premix is work? I have rid myself of shit working oil pumps since 1975. Better and more consistent performance by far. What do you view as "work"? Math? Your mobile phone won't make a mistake. Sorry brother, but simple is less work and less pain.
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on May 4, 2019 10:44:57 GMT -5
Haha! Premix is work? I have rid myself of shit working oil pumps since 1975. Better and more consistent performance by far. What do you view as "work"? Math? Your mobile phone won't make a mistake. Sorry brother, but simple is less work and less pain. I would have replied to this - but it's just to much work. |
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on May 4, 2019 10:46:12 GMT -5
That's just a lot of work. I don’t trust factory pumps with oversized cylinders. They meter volume/rpm, not volume/volume. Once you’ve increased your bike’s fuel consumption with a kit/carb/pipe how do you know it’s pumping enough oil? Some kits, Polini Corsa for one, ask for 3% mix. How do you adjust your factory pump for that? I’ve seized one engine due to oil starvation and don’t want to risk it again. Pouring a spot of oil in when I fill up isn’t that big a deal. It'd be an expensive doohickey I’m sure but someone should come up with a dual fuel/oil pump that meters one to the other. No problem on sport cylinders. |
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Post by aeroxbud on May 4, 2019 13:29:58 GMT -5
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Post by ThomasTPFL on May 4, 2019 14:43:23 GMT -5
€ No problem on sport cylinders. It was a Malossi sport cylinder, Technigas Next R, stock upjetted carb combo that seized from oil starvation on me. Temps were fine, plug looked fine, top of the cylinder and head looked fine. Had four solid scores down the sides, and on disassembly realized the main bearings were picking up a lot of slop. |
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on May 4, 2019 15:10:54 GMT -5
€ No problem on sport cylinders. It was a Malossi sport cylinder, Technigas Next R, stock upjetted carb combo that seized from oil starvation on me. Temps were fine, plug looked fine, top of the cylinder and head looked fine. Had four solid scores down the sides, and on disassembly realized the main bearings were picking up a lot of slop. That's unfortunate. I have good experience with the standard oil pump and big bore. Malossi sport altso in fact. Combined with Giannelli Go. Run it WOT for miles and miles. |
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Post by 'O'Verse on May 4, 2019 17:29:57 GMT -5
Anything above stock go pre mix. Guarantee that the cylinder is getting the lubrication it needs. Stock pumps aren't known to fail but, there also not known for supplying more oil to a cylinder that revs higher and needs it.  |
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Post by benji on May 4, 2019 18:59:20 GMT -5
here is the answer. Clearance your bbk for the pump. It is a good idea to add more oil to the cylinder, but you have a couple options there. You can go premix, or you can add oil to the gas and still use the pump. I know of guys who've added an oz of oil the the fuel tank and still ran the pump. If the pump is attached to the throttle, you can ziptie the pump to 'full open" so it gives a little more oil. You can also do nothing, and just use the OEM oil pump set up. But, You may burn up your cylinder faster. |
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Post by benji on May 4, 2019 19:01:16 GMT -5
Haha! Premix is work? I have rid myself of shit working oil pumps since 1975. Better and more consistent performance by far. What do you view as "work"? Math? Your mobile phone won't make a mistake. Sorry brother, but simple is less work and less pain. I would have replied to this - but it's just to much work. I'll reply- it's more work when you add oil to the gas. It may not be much work, but it is more work than just pulling up to the pump and filling up. |
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