This is why you replace coolant on HD200

[BettinANDlosing]

Almost every SYM I work on the radiator looks like this. IDK what they did at the factory but it is one major down point of most of the liquid cooled Sym scooters. Performed a full flush with distilled water and added high quality coolant.

[Stig / Major Tom]

Perhaps their shipping coolant is missing a rust inhibitor?.....Which makes little sense to me.
And have I not read of SYM problems with over-heating due to the difficulty 'burping' an air pocket from the coolant system after replacing the coolant?
Always seemed like what should be a simple procedure (flush/fill the coolant) becomes a touchy procedure on these SYMs ?
And parts availability is a concern sometimes - otherwise a heck of a scooter!
(there is a great video/post/pix of a young Russian couple buying a used SYM and riding all over America - two-up with all kinds of gear. No probs w/the scoot!)
Stig

[0BARK4322]

Are you sure they didn't use caramel for coolant

[AMAC1680]

Perhaps their shipping coolant is missing a rust inhibitor?.....Which makes little sense to me.
And have I not read of SYM problems with over-heating due to the difficulty 'burping' an air pocket from the coolant system after replacing the coolant?
Always seemed like what should be a simple procedure (flush/fill the coolant) becomes a touchy procedure on these SYMs ?
And parts availability is a concern sometimes - otherwise a heck of a scooter!
(there is a great video/post/pix of a young Russian couple buying a used SYM and riding all over America - two-up with all kinds of gear. No probs w/the scoot!)
Stig

Rumor has it that it's missing more than just the rust inhibitor, lol.
The dealer here flushes all new SYMs as PDI. Sad that it needs to be done. That said the stuff coming out of the 2014s looks better.

Of course it could just be food coloring......

Be Big.
AMAC

[SUPER 9 MANN]

YUCKY

[slug50]

Where is all the "rust" coming from on a aluminum engine, surely these little engines don't have wet sleeves. I have seen cars with less crap in the coolant after 100,000 miles of neglect. I would be really mad if I bought a new scooter and had this happen in such a short time, the Kymco liquid cooled don't do this, similar trained engineers and real similar manufacturing standards, just baffled about the whole thing.

[AMAC1680]

Where is all the "rust" coming from on a aluminum engine, surely these little engines don't have wet sleeves. I have seen cars with less crap in the coolant after 100,000 miles of neglect. I would be really mad if I bought a new scooter and had this happen in such a short time, the Kymco liquid cooled don't do this, similar trained engineers and real similar manufacturing standards, just baffled about the whole thing.

The answer I get is a "problem in the supply line".
They clain the vendor issues have been resolved. Time will tell.

BTW I'm not sure it's rust. I've seen the crap come out and it looks more like it coolant itself that gets funky.

Be Big,
AMAC

[Yager200i]

Isn't that what DexCool (aka DeathCool) coolant looked like in GM cars when it was drained?

Kymco says they use DexCool-rated coolant in my scooter as factory-fill, I'm assuming they use the same in all of their scooters... and yet we don't see this sort of problem.

Does Sym use DexCool coolant?

From my antifreeze analysis:
=========================
http://www.kymcoforum.com/index.php?topic=3649.msg97448
DEXCOOL NOTE:
DexCool is not a specific formula, it just denotes that the anti-freeze product passed GM's testing requirements. All three brands that have the label (Texaco Havoline, Prestone Extended Life and Zerex Extended Life) are somewhat similar. In particular, they’re OAT (Organic Acid Technology) coolants. All DexCool-approved coolants to date use two organic acid rust/corrosion inhibitors, one called sebacate, the other called 2-EHA (which stands for 2-ethylhexanoic acid).

POTASSIUM 2-ETHYL HEXANOATE:
DO NOT USE THIS INGREDIENT! This is an OAT (Organic Acid Technology) ingredient. If the least bit of air gets into your system, it will turn into a rusty-colored sludge that will plug up coolant passages (i.e.: Dexcool used it, and has gained the nickname 'DeathCool'). Your coolant expansion tank will sludge up, since it is exposed to air. OAT anti-freeze ingredients take a long time to lay down a protective layer of metal oxide (the passivation layer) to protect the metal. Hence, if your water pump is cavitating and exposing fresh metal (as I suspect ours do, with the high RPMs developed), OAT will not work quickly enough to protect it. The result will be a badly corroded and eroded pump impellar. This was not listed on any of the anti-freeze products I looked at, but is known to be used in some Dex-Cool anti-freeze products.
=========================

I've found Zerex Asian Vehicle is the most-compatible coolant on the market for our scooters. I looked at pretty much every coolant out there, all their ingredients, did tons of research on the effects of the ingredients upon the metals in our scooters and how those ingredients age, etc.