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Post by cleverscooterpun on May 15, 2015 18:06:42 GMT -5
So a couple of weeks ago, I was riding to the 'upcountry' part of the island. Its about 2000' climb in elevation. I have made this ride several times before with no issues. This day I decided to go back and forth twice, to drop off a gift for the girlfriend. Well on the return trip I started losing power, and eventually the scoot died. I eventually discover that I had blown oil into the air box and clogged the air filter.
I clean the air filter, dry it, put it back in, but again after a few miles, I've dumped all my oil.
I did some searching on here and found the cheap fix of using a small fuel filter, attached to the line going from the valve cover to the airbox (this is the line that's spewing the oil), mounted vertically etc. Yet still, spewing oil.
I eventually rig it all up and load the storage with several quarts of oil, and nurse it back to town where the scooter shop is. I get it looked at, and the answer I am told is that I am simply putting too much oil in. I try to explain that this is not the case, but the mechanic insists that he could not get it to spew oil, so he says I am just over filling it.
Well I take the scoot back home, it spews almost all of its oil in the three mile ride to my house. Now I'm at a loss.
Could it be an internal gasket that's blown and allowing it to spew too much oil through this hose? If I take it to the shop to diagnosis this, I know I'll end up paying way too much.
This problem came out of nowhere, after well over 1k miles on the new bore kit.
Would it be worth while to get one of scrappy dogs products that claim to fix this?
Am I stuck taking the engine apart?
Any help would be greatly appreciated.
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Post by keikara on May 15, 2015 18:15:24 GMT -5
I'm almost wondering if you are getting blow by thru the rings which is pressurizing the crank case and forcing the oil to come out the valve cover. May have to do a compression and leak down test to tell for sure if it could be the rings, or I may be way off, just what came to mind after reading the issues. Shop may not have been able to duplicate if they did not take it for a ride and only looked at it in the shop.
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Post by geh3333 on May 15, 2015 18:57:24 GMT -5
I'm almost wondering if you are getting blow by thru the rings which is pressurizing the crank case and forcing the oil to come out the valve cover. May have to do a compression and leak down test to tell for sure if it could be the rings, or I may be way off, just what came to mind after reading the issues. Shop may not have been able to duplicate if they did not take it for a ride and only looked at it in the shop. I'd expect the scoot to smoke like a chimney if oil was passing the rings. How much oil is left in the crank case after this happens ? |
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Post by cleverscooterpun on May 15, 2015 19:47:42 GMT -5
I'd say less than 1/8" on the dip stick, if any.
It doesn't really smoke at all when this happens. Any smoke that I have seen was due to oil making its way onto the exhaust.
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Post by ramblinman on May 15, 2015 20:05:46 GMT -5
I'd say less than 1/8" on the dip stick, if any slim margin between needing oil and over filling if you see oil on the dip stick. if i check mine and see 1/8" on the dip stick then i add about 100ml. these scoots only take about 750ml total. i'm not agreeing with your mechanic... just pointing out the obviuos incase you're not aware. |
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Post by dmartin95 on May 15, 2015 20:58:19 GMT -5
I'd say less than 1/8" on the dip stick, if any. It doesn't really smoke at all when this happens. Any smoke that I have seen was due to oil making its way onto the exhaust. I advise you to get a compression tester and check that first... Excessive blow-by can be caused from your piston rings. You may need to hone the cylinder and install a new set of rings... You may also want to consider checking your valve clearances. |
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Post by cleverscooterpun on May 15, 2015 20:59:33 GMT -5
How bout just installing a 100cc kit? Wouldn't that essentially replace any potential issue?
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Post by dmartin95 on May 15, 2015 21:13:25 GMT -5
How bout just installing a 100cc kit? Wouldn't that essentially replace any potential issue? Yes and no.... When you install a BBK, you also have to mod your carb (upjet), free flow air and possibly exhaust.... But yes, if the problem is coming from somewhere within the compression chamber, a BBK would fix the problem. But if you don't do the other mods, you can create more problems..... For example... You put a BBK and run stock carb, you'll lean out your motor and over heat it, causing it to seize up..... |
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Post by geh3333 on May 15, 2015 21:53:51 GMT -5
I'd say less than 1/8" on the dip stick, if any. It doesn't really smoke at all when this happens. Any smoke that I have seen was due to oil making its way onto the exhaust. Is that screwed in all the way , and on the center stand ? Never add and check oil unless the scoot is level " side to side " . if you and your mechanic added oil with the scoot on the side stand , then more then likely your scoot had too much oil. But if done on the center stand , you should be fine. I always check my oil without screwing in the dipstick. So if the scoot is level , its full when it reads halfway up the dipstick. If I check it on the side stand , it only reads about 1/8 inch or so up the dipstick. I do agree to def check compression ! |
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Post by cleverscooterpun on May 15, 2015 21:57:44 GMT -5
Wait, so you are saying, with the scooter on the center stand, and the dipstick NOT screwed in, full would read halfway up the hashed segment??
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Post by geh3333 on May 15, 2015 22:06:59 GMT -5
Wait, so you are saying, with the scooter on the center stand, and the dipstick NOT screwed in, full would read halfway up the hashed segment?? That's how it is for many . I have a 150 , so I'm not to sure how yours is. Are you measuring the same as me , but fully up the marked area on the dipstick ? |
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Post by geh3333 on May 15, 2015 22:09:38 GMT -5
If I'd add the full quart it would above the marked area on the dipstick . actually pretty far above. Not screwed in. After you reach " full- halfway up " you can over fill pretty quick.
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Post by geh3333 on May 15, 2015 22:23:56 GMT -5
Best thing to do , is to drain the oil and see how much is left in the crank case. This will tell you if it was over filled or not. You won't get all the oil out but you will get most of it out.
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Post by keikara on May 15, 2015 22:40:56 GMT -5
I'm almost wondering if you are getting blow by thru the rings which is pressurizing the crank case and forcing the oil to come out the valve cover. May have to do a compression and leak down test to tell for sure if it could be the rings, or I may be way off, just what came to mind after reading the issues. Shop may not have been able to duplicate if they did not take it for a ride and only looked at it in the shop. I'd expect the scoot to smoke like a chimney if oil was passing the rings. How much oil is left in the crank case after this happens ? Only if oil was getting into the combustion chamber, but if the blow by is back into the motor there would be no smoking, it would in turn just be letting the compression leak past the rings and basically prime the crank case, which in turn would cause it to spit oil. Have seen this happen on a car motor don't know if that could happen on one of the scooter motors, but heck anything is possible. |
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Post by geh3333 on May 15, 2015 22:48:37 GMT -5
I'd expect the scoot to smoke like a chimney if oil was passing the rings. How much oil is left in the crank case after this happens ? Only if oil was getting into the combustion chamber, but if the blow by is back into the motor there would be no smoking, it would in turn just be letting the compression leak past the rings and basically prime the crank case, which in turn would cause it to spit oil. Have seen this happen on a car motor don't know if that could happen on one of the scooter motors, but heck anything is possible. TBA , I would not see much harm since there is already oil flying around in the crank case . I'm sure the crank case oil is reaching the lower cylinder wall anyway . isn't the crank case pretty much open around the inner crank ? |
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