50cc motor bikes

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1. Scooter Repair

   So you buy a scooter and something breaks. Who is going to fix it? Well, if you’ve bough in person from our retail store in California,? we have access to parts, shop manuals and we will have mechanics trained to fix your scooter. All you have to do is bring them in.

   But what if you are located outside of California, we have a few suggestions for you. You can try contacting local motorcycle (or better still, scooter) repair shops. If they are not very enthusiastic about working on a Chinese scooter, no worry! Have them contact our tech support department directly. We will make sure they will have the easy access to our spare parts and the technical support they need. Remember, we are the only company who actually carries all common parts in stock.

   150cc engine and transmission as used in many Chinese scooters

   You might also get some help from a lawn mower repair shop. They are used to working on small engines and the engine in a scooter isn’t all that different from the engine in a lawn mower. You can also try snowmobile and ATV repair shops.

   CVT (transmission) belt. Price ~ $40. Belt life anywhere from 2500 to 10,000 miles

   Comment by master — 05/12/2010 @ 3:15 pm

2. If you do have a spark, you need to check the gas. Make sure there is gas in the tank first! If there is you need to check the fuel valve. Most scooters use a gravity fuel feed by locating the fuel tank higher than the carburetor. The fuel usually then flows through filter and then through a vacuum operated valve. The valve has three hoses connected to it. One if from the fuel tank and is for the gas going in, one is connected to the carburetor and is for the gas coming out and one goes to the engine manifold which provides a vacuum. If you disconnect the hose from the carburetor, fuel should run out when you crank the engine (be careful to catch the gas if you do this and don’t do it with a hot engine). If you don’t see gas the fuel valve may be faulty. You can try applying a vacuum to the control port of the valve and see if the fuel flows. Sucking on the line is one way to do this (but make sure it’s the vacuum line, not the gas line if you try this!).

   If you are getting a spark and you are getting gas to the carburetor and the engine is turning over on the starter OK, it’s possible that the electrically operated automatic choke has failed. It’s supposed to operate when the engine is cold, but if it’s stuck or burned out, the mixture will be weak and the scooter probably won’t start. The automatic choke is usually a black cylindrical object attached to the carburetor with a couple of wires coming out of it as shown on the left. It’s the only electrical powered component attached to the carburetor, so it’s usually not hard to spot. If you have a voltmeter you can measure the resistance across the leads of the choke. It should be somewhere in the region of around 10 or 20 ohms. If it’s an open circuit, it’s burned out and will need to be replaced. If it seems to be OK it may be stuck, or the wiring to it may have a problem. Check to see that it’s getting voltage.

   It’s also possible that there is a problem with the carburetor and if so you may need to remove it and clean it out. If the scooter has been sitting for a few months with gas in the carburetor, the gas may have evaporated and left a sticky “gum” behind that will prevent the carburetor from working properly and which must be removed.

   If the automatic choke is OK, the starter cranks the engine, there’s gas and there’s a spark then there may be an engine problem. You need to check the cylinder compression. You need a compression tester to do this. It screws in instead of the spark plug and measures cylinder pressure. When you crank the engine you should see a reading of around 150 psi or more. If it’s 100 psi or less there’s likely and engine problem (bad valve, bad piston, failed piston rings) which will need the engine taken apart to find.
   Probably the most common problems are a dead battery or carburetor problems due to bad adjustment or build up of gummy deposits. Carburetor problems usually come on slowly though. If a scooter is OK one day and refuses to start the next day, I’d first suspect an electrical problem.

   Comment by master — 05/12/2010 @ 3:15 pm

3. Small 50cc scooters (“Mopeds”) are good for about 30 mph, maybe 35 mph in some states without speed restrictions. They will just about keep up with urban traffic, but you have to ride them WOT (Wide Open Throttle) do to that. This can be good for novices and young riders because in most of states the rider does not need a motorcycle license to operate a 50cc less scooter, but the inability to keep up with faster traffic can sometimes be a hazard as cars try to “squeeze” past you when there really isn’t room.

   150cc Chinese scooter. It might look fast, but it’s not really very happy above 60 mph. Mid sized 150cc scooters are good for 55-65 mph, though with a long enough run at it they may get up to 65+mph, especially if there’s a tail wind or slight downhill grade. 45-50mph is enough to keep up with most urban and suburban traffic, though it’s really not enough to flow with the traffic on a freeway, where speeds of 65-75mph are more normal. We?ˉd certainly recommend a 150cc scooter over a 50cc scooter for commuting unless you live in Manhattan. Most of the 150cc scooters cruise quite comfortably at 45-50mph.

   If you want a high speed machine, you would probably be better off with a motorcycle.? 250cc scooters are just about OK for freeway use and should be able to cruise at 60mph and get up to speeds of 70mph or more if pushed. We wouldn’t recommend riding anything less than a 250cc scooter on the freeway, you might want to check on our 300cc motorcycle that is listed on our website.

   What MPG Does a Scooter Get?

   This depends mostly on the engine size. The smallest engines are typically 49cc and they can give up to 90 mpg, depending on what type of riding you do and how much you weigh. Obviously if you weight 300lbs and do mostly short “stop and go” trips you’ll get a lower mileage than if you weight 100lbs and travel mostly on long trips at modest speeds. At the extreme, we’ve seen figures of 110-120 mpg for 50c scooters when the rider was trying their best to drive as economically as possible.

   150cc scooters aren’t quite as frugal, but we’ve seen reports of up to 85mpg. With the larger engine sizes (300cc) you should still get around 70 mpg from a scooter traveling at legal highway speeds. That’s about the same as a Toyota Prius Hybrid, but the scooter will be a lot more fun!

   Comment by master — 05/12/2010 @ 3:15 pm

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