Hello from Texas!  By  wingsltd (Read 1,487 times)

Welcome to the forum! I have the same exact make, model, and year scooter. So if you have any questions let me know.

If you have noticed this forum has a very informative tech library. There is a lot of good information there. And if you have any question just ask, there are a lot of very knowledgable members here that are more than willing to help.

As for websites it depends what you are looking for, scrappydogscooters.com, partsforscooters.com, eBay, and Amazon all have parts. 157QMJ is the engine model.

This is a good one for hard to find OEM parts.
www.powersportsmax.com/index_parts.php/tID/3/vID/1006

I am currently at about 1200 km on the odometer. And I have done oil changes at 100, 300, and 1000 kms. Gear oil is another one. First change was at 100, my next days off I'll be doing it again.

As for mods, removing the emission devices, 12 gram rollers, after-market carb for jet and Air-fuel adjustment, rejet to 108, pod filter, 11-pole stator upgrade, and O2 sensor. The 11-pole stator was necessary for the amount of current the O2 sensor needed. Before the stator upgrade the 8 pole was not enough and my battery was not charging.

Almost forgot, I also changed the vacuum and fuel lines. The factory lines become brittle very quickly which will lead to vacuum leak and other problems.

This is a good video on how to change the engine oil. Do not be alarmed when you see metal particles in the oil after the first few changes. You have to be careful to not over or under fill the oil. I use 700 milliliters.

Welcome to the forum!

I'm an old biker from back in the sixties, and discovered scooters seven years ago. They are great! I now ride a well-used Kymco 250, but happily rode a Xingyue 150 (probably a near "clone" of yours) for six years.

Chinese scoots have definitely gotten much better over the years. My old Xingyue did ALL the typical "things Chinese" but the overall quality was good, and after working out the bugs, it was great transportation for five years.

The things I had to "correct" were typical and it's likely that your new model may be much better. My "deal-breakers" included the factory CDI, fuel/vacuum lines and carburetor.

The CDI went bad the first few months (slowly... did all sorts of weird things causing me to try to adjust other things until I just replaced it)... LOL! I replaced it with one of the many "color" CDI's off eBay and it was very good. Please note; NOTHING on these scooters is "waterproof". Do NOT spray-wash under the seat, or into the dash/electrics. After several years, I ruined the new CDI simply washing the engine down, requiring another replacement and a long walk, pushing the scoot home...

Replacing the coil with a good Japanese one also helped. I just don't trust Chinese electrics in general but I think most of the aftermarket parts are pretty good.

Fuel/vacuum lines... The older Chinese lines do not seem to hold up to American gasoline. Mine "decomposed" from the INSIDE... (how SNEAKY)... And really gummed-up the carb... So bad, I replaced the carb after numerous attempts to clean it out. I used an inexpensive Japanese Mikuni carb that was not a high-performance version, but a simple OEM style replacement. That carb was very good, but would not have been necessary had I replaced the fuel lines early on.

I also replaced the vacuum-operated petcock with a manual one since those have a tendency to act up. Just a precaution.

Some Chinese scoots run fine with the factory air-filter system and some don't. I can't explain it. If yours is good, don't fool with it. Mine did not. I finally ended up using a UNI "sock" filter with no extension between it and the carb. That setup was easy to tune and ran great.

I found the factory drive-train was pretty good as-is. I was however, able to improve acceleration and top speed by fooling with the variator weights. I was about to go with sliders (which offer some additional advantages by allowing more "full" range opening and closing of the variator) when I decided to "upgrade" to a larger engine sized scooter for more speed capability on increasingly faster local streets.

Even with a new, improved Chinese 150 I would consider replacing the fuel/vacuum lines and petcock just for "peace of mind"... It's a cheap, easy fix. I would also consider replacing the CDI with a no-rev-limit upgraded one. They too are affordable, a 10-minute "plug n' play" swap and on my scoot, made a BIG improvement.

Also being from Texas (Grapevine) I found the 100 degree summers make these air-cooled scoots run HOT! (Heck, they make my water-cooled Kymco run HOT too...) The second year I had the Xyngyue, I got a cooling-fan "scoop" and made an extension to place it out past the lower plastics, into fresh air. That mod actually lowered my oil-temp by around 20 degrees on the hottest days. It's an easy mod, not necessary except for extreme hot weather, but my scoot did not dirty-up the oil so badly after the scoop went on. I figured that made the mod worthwhile.









The fan-scoop is just one of those "Texas mods" that actually did significantly lower the scoot's operating temperature so it's worth a thought down the road.

The exhaust shown in those pix is actually a 50 cc two-stroke "chamber" pipe I had on hand. From my 1960's kart-racing days, I knew 4-stroke engines run great with them too. My OEM muffler finally rotted out, so I made a header and put the chamber on. Mainly, I wanted to replace the OEM header with a full-diameter one. Most OEM headers are actually SMALLER inside-diameter than the exhaust port. Opening up the header did make a noticeable difference in "tuneability"... Again, something to think about down the road.

As for oil, my Xingyue manual (and my Kymco manual) both recommend 15w-40 Diesel oil. I've always used it and have had no trouble. The gears usually use regular 90W gear oil. Whew, does THAT stuff SMELL!

At any rate, I found Chinese scoots to be a very good bargain. Lots of "bang for the buck" and most of the common problems are simple fixes. There are plenty of riders here to help you out with most any need.

Ride safe, and enjoy that new scoot!

Leo in Texas

That leak you are having is coming from the valve cover vent. I had the same issue, and one of the reason why I removed the emission devices.

One way to fix that is to remove that tube from the airbox zip tie to the bottom frame, and have it vent to the atmosphere. It's designed so any oily mist from the valve cover will be vented into the airbox, then eventually sucked into the carburetor to be burned. In theory it should be good and reduce emissions, but it's poorly designed and only will gunk up the engine with carbon and burned oil residue.

Well the back is starting to fall apart from the heavy headwinds..going to have to superglue it back together.

The only other worry I have now is that I made a kind of bad investment in the cheap scooter since I couldn't afford anything else.

Do the engines really rattle themselves to death at 2k Miles or 2k KM?

If so..that means in my car I would have spent $268 in gas..which is nothing compared to the $1300 I spent financing the scooter..and the muffler is rattling off too..lol..

I was wondering if there's ways to get a LOT more life out of it, or if there's things we can replace so it actually lasts long enough to pay for itself.

I Drive 7.7 miles to work 1 way..so that's a minimum of 14 miles a day..which equals to about 66 days before dead engine..though I've been driving it a lot more than that (409km today on the odo) and it's just got me kind of in a funk if it's really going to finish falling apart around 3628KM