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Post by gingel on Aug 8, 2013 14:57:23 GMT -5
Hi, I wanted to share with you that i just reached to 100K KM (around 62,000 miles) on my 125cc scooter. It's a SYM scooter, with a 125cc engine (air cooled). I never had to rebuild the engine, although recently i noticed it's starting to burn a little more oil. It was burning around 200ml of oil for 1000 km (620 mile) for the last 10K KM, but now i noticed it's burning a little more (still need to follow it to know exactly how much more). I don't see any leaks. The scooter runs ok, feels great. Is it possible that i will only need to replace the piston rings and gaskets, to lower the oil consumption? Do i need to do something to the cylinder if it doesn't have any damage? Thank you. Attachments:
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Post by jeepsteve92xj on Aug 8, 2013 15:57:51 GMT -5
Thats a nice high mileage scoot!
Gaskets, Rings, hone the bore, at least lap the valves if not replace them, and new valve stem seals. Verify the valve guides aren't out of spec.
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Post by sailracer on Aug 8, 2013 17:16:31 GMT -5
[replyingto=gingel]gingel[/replyingto]   I think you win the who's got the most mileage thread |
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Post by brandjur on Aug 8, 2013 18:09:40 GMT -5
Wow! That shows the SYM quality. I think you are due for new rings at least, if not a rebuild. If I were you, I would just keep on riding it and check the oil more often. Ride until it dies.
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Post by domindart on Aug 8, 2013 19:36:52 GMT -5
DX
I hope I get mileage remotely close to that! ^)
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Post by sailracer on Aug 8, 2013 20:29:47 GMT -5
[replyingto=domindart]domindart[/replyingto] :)You will... If you keep running out of gas and pushing it  (LOL, I HAD TO! just kidding) |
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Post by domindart on Aug 8, 2013 21:07:22 GMT -5
 shut up, my gauge is broke 
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Post by rockynv on Aug 8, 2013 22:29:44 GMT -5
First if you haven't done so try a heavy treatment of the gas with Berrymans Total Care. It could simple be that the oil ring has gotten a bit sticky and isn't expanding fully when the engine warms up so the Berryman's could free things up and reduce the oil consumption. Next better would be treating with Zmax using both the fuel and engine treatments. I have had good results freeing up dirty automotive and power equipment that we had given up for lost using that product.
Hone it lightly and if they are available re-ring it with chrome rings before the piston starts to chatter and leaves chatter marks on the bore. Verify if that Sym has a ceramic cylinder and modify the re-ring process to accomodate that if required.
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Post by skuttadawg on Aug 8, 2013 22:47:15 GMT -5
Amazing !! What oil do you use and how often do you change it ? Is engine stock or any mods ? How many belts and weights has it used up ? I thought I had a lot of miles with 17k . I can eat off of my engine no oil leaks at all . Congratulations on having a good scooter and being smart enough to take such good care of it .
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Post by gingel on Aug 8, 2013 23:48:54 GMT -5
Thank you all for the replies . First if you haven't done so try a heavy treatment of the gas with Berrymans Total Care. It could simple be that the oil ring has gotten a bit sticky and isn't expanding fully when the engine warms up so the Berryman's could free things up and reduce the oil consumption. Next better would be treating with Zmax using both the fuel and engine treatments. I have had good results freeing up dirty automotive and power equipment that we had given up for lost using that product. Where i live, there is a popular fuel additive called 44K, but i don't know if it's also for carburetor. you can read about it here: (scroll down to find it) www.bgprod.com/products/fuelair.htmlWhat do you think about that? Can a fuel additive reach the oil rings? I thought you need to put something in your oil, so it will reach the oil rings. Amazing !! What oil do you use and how often do you change it ? Is engine stock or any mods ? How many belts and weights has it used up ? I thought I had a lot of miles with 17k . I can eat off of my engine no oil leaks at all . Congratulations on having a good scooter and being smart enough to take such good care of it . I always used "Motul 10W40 scooter expert" oil (it's a semi synthetic). I change the entire amount of oil every 4000 KM. Although now, because i add about 200ml every 1000 KM, until i reach the 4000 KM mark, it's like i already did one change of oil. The engine is stock, never did any mods to it or the variator. I replace the roller weights every 8000 KM, and a genuine SYM belt can hold between 12-16K KM. Sometimes i used non-genuine belts which held about 8-10K KM. |
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Post by prodigit on Aug 9, 2013 1:45:02 GMT -5
You do need to flush the oil though, otherwise the debris will collect in the engine if you only refill, never change the oil.
I wonder if they sell a BBK for the SYM, that way you don't need to do much of anything, but install the BBK cylinder kit, and valve adjustment.
I'd simply ride the scoot, until the bearings start giving up, and only then rebuild it; some people are for preventive maintenance, but I usually only repair broken things. It's a gamble, but more than likely you can save more money doing things this way, than replacing them preventively, as it may be that you can still go many more miles before the engine needs a rebuild.
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Post by rockynv on Aug 9, 2013 9:39:52 GMT -5
A heavy dosage of Berryman's Total will break down the carbon build up along the cylinder to a degree and may even leave your oil so dirty that you may need to change it early. I believe that Yamaha has an OEM fuel treatment that is used right before an oil change to help keep carbon buildup from causing piston rings to stick and that also can cause a visible darkening of the oil as it breaks down carbon buildup in the cylinder.
The Zmax engine treatment in the oil along with their fuel treatment combined is more heavy duty cleaning and engine treatment approach that will go clean the rings up from both sides. You need to run the engine in immediately after adding the Zmax so you can't put it in and let it sit overnight without running the engine and going for at least a 10 minute ride. It is a metal penetrant and will have been absorbed in the bottom or the oil sump if you let it sit and the evaporatives which should have been released by engine heat after a minute or so will not have been flashed off if you let it sit overnight before running it in.
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Post by gingel on Aug 10, 2013 6:47:01 GMT -5
Maybe i should try and use some fuel additive. Unfortunately, in my area i don't think i will find the "Berryman's Total" or "Zmax engine treatment" . There is the "44k" i wrote about and also something from "liqui moly" . You do need to flush the oil though, otherwise the debris will collect in the engine if you only refill, never change the oil. I wonder if they sell a BBK for the SYM, that way you don't need to do much of anything, but install the BBK cylinder kit, and valve adjustment. I'd simply ride the scoot, until the bearings start giving up, and only then rebuild it; some people are for preventive maintenance, but I usually only repair broken things. It's a gamble, but more than likely you can save more money doing things this way, than replacing them preventively, as it may be that you can still go many more miles before the engine needs a rebuild. I do a complete oil change every 4000 KM (around 2500 miles). The manufacturer is saying to change the oil every 1000KM (600 miles), but they are saying to use mineral oil. The SYM importer where i live, recommend the use of semi synthetic oil, and to change the oil every 4000 KM. I also thought about riding it until it dies, but if it will start burning too much oil, then it's better to do a rebuild (at least for the top end). |
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Post by spandi on Aug 10, 2013 6:57:19 GMT -5
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Post by SylvreKat on Aug 10, 2013 7:24:25 GMT -5
I'm thinking there's no chance I'll live long enough for my poor Piggy to see mileage even half that high. Sigh. And if the stupid little rains keep on here, I'll never even hit five digits on the odo. Darn rain.  >'Kat |
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MJ, Orange coil, Blue Performance CDI (Orange NCY did not work), NGK Iridium, 5g Sliders
