I bought an MP150B JCL 150cc scooter from this company on 3/21/2011. The scooter arrived in good shape but as soon as I got it assembled and running the first day it was already leaking oil all over my garage floor. The scooter continued to drip lots of oil every place I went for several months until my mechanic finally figured out that there was a crack on the valve cover! How could that be? It's a single piece of metal? Obviously they made a mistake in the metallurgy and I would not have expected this from a bike that cost me $1,000. On the first month I had the scooter the voltage regulator failed as I was leaving to go to work at night I noticed my headlight and tail light would not turn on. So I couldn't bring the bike to the shop until the next day in the day time. Soon after I had all kinds of problems that needed to be repaired like the odometer and speedometer not working. The exhuast gasket broke 3 times and I had to bring it to the shop 3 times for repairs. The scooter actually sat in the repair shop more then being used on the road the whole time I had it.
Later the exhaust clamps kept breaking on me. My mechanic couldn't fix it because they were completely out of parts both new and used. I tried ordering online but all the companies were sold out. These were the clamps that held the exhuast pipe onto the scooter from falling off. There were two of them and they were made so cheaply that they broke constantly especially on a hot day because they weren't made to stand up to the heat. I later found out that these Chinese scooters are made of "Pot metal" which is a very low grade/quality metal forged at low temperatures with microscopic pits and fissures inside that weaken the metal and cause accelerated rust and corrosion. Later through the months I had the floorboard break! I coudldn't believe it, it's the part that holds the floorboard together with the frame actually failed fromt he weight of my feet so when I rode it I had to move my right food as far as I could to the left otherwise all the plastic wouldn't have fallen off. Another part that failed was the seat. Over time the seat got more and more uncomfortable. It turns out the plastic underneath wasn't strong enough to support my weight. I weighed 160 pounds at the time! That is insane. The plastic padding underneath the seat was starting to split and separate under my weight after only less than 3 months of normal use. I too had problems of enging stalling during the first month of use. Actually on the 3rd day. Notably during cold weather. The engine uses a very cheap "automatic choke" that can get stuck open or closed causing performance loss, poor gas mileage and engine stalling. What my mechanic had to do was bypass it all together. (there goes my waranty). Also because the bike was made somewhere else the information on the owners manual was in conflict with the stickers on the bike. The manual said 87 octane is fine but the sticker on the bike said 91 octane only. So who are you going to believe? I tried calling Powersportsmax but the mexican girl on the other end of the line had no clue what I was talking about and was of no help whatsoever. That is just one example of the many inconsistencies in the manual. The manual doesn't even do a good job explaining the break in period. It doesn't specify the information in "Kilometers" or "Miles". There is a HUGE difference here but once again Powersportsmax was of no help at all. They were worthless after I bought the scooter from them Online. It was actually shipped from Dallas Texas even though the company that I bought it from is in South El Monte California.
I think I had the scooter for 4 months when the engine blew. I even made sure the engine was properly broken in and everything. I made all my oil changes well ahead of schedule and used the full synthetic engine oil. None of it mattered in the end. It was late summer and I was riding home from work and noticed the slugging performance and a slight wobble in the rear wheel. It felt like something was draging but it was not the rear brake. I parked it and woke up the next morning and noticed a huge puddle of motor oil under the scooter all over the garage floor. I knew then that the engine was toast and the scooter was a gonner. It wouldn't be worth putting a new engine in the scooter because the scooter itself isn't worth keeping. It was so poorly constructed that the whole thing was falling apart. It had a poor quality frame, poor quality electrical, poor quality engine, poor quality everything. It sat for about 6 months and I got someone to buy it off of me for $100 non-running. He was going to fix it up for reselling as a business. Good luck with that!
On the bright side I went shopping for a new scooter locally and found out that there is a huge difference between a Chinese scooter and a Taiwan/Korean made scooter. A Taiwan/Korean scooter sells for twice as much and it's like buying a Honda, Nissan, or Toyota car. A Japanese/Italian scooter is like buying a Mercedes or BMW car. I heard you can't go wrong with Kymco, Honda, Suzuki, or Yamaha brand scooters. But stay away from Chinese made scooters. They are all junk. Taiwan and Korean made scooters are acceptable. And you can tell if you look closely the difference in the craftsmanship and quality.