Wednesday, February 25, 2009

Information About The 49cc Pocket Bike

How do I find the best Carb settings on my 49cc mini bike?
This is one of the simplest but yet annoying things to do on your pocket bike. Here it is straight forward and to the point. To adjust your air fuel mixture screw on your carb do the following as I was told by a wise certified Ford mechanic.All you do is turn on the bike let it run for a couple of mins. till it idles. Next start turning the air/fuel mixture screw counter clockwise until the bike sounds like its about to turn off, then just turn the screw in the clockwise direction half a notch or so where the engine sounds stable now you are ready to go.Now if you know what you are doing you will also know that this is a form of "calibration". Therefore when you do modifications to your bike which effect your fuel air mixture or how your engine breaths you can always re-adjust using the above instructions to get the best performance, so if your part of "The x7 Project" this is not a permanent setting but one which you will change time to time depending on modifications. For more info on "The x7 Project" click on the pic at the bottom of the page.
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Thursday, October 9, 2008

How to install a pocket bike fuel filter?
How to install a pocket bike fuel filter.
You can pick up a filter at a local auto parts store. It is a paper element fuel filter, and small enough to install on a pocket bike. There are a lot of different fuel filters out in the market made for small engines. The better ones are the ones with a micron mesh the stainless steel kind. If you do go to an auto parts store just ask the sales personnel for a fuel filter that fits two stroke engines. Normal cost for the fuel filter ranges from $2.00 to $10.00 depending on quality etc. You will also need steel clamps that will fit a ¼ inch fuel line. You’ll need four of them to clamp on each end (one at the nozzle of the gas tank, two for each end of the fuel filter, and one at the fuel line that connects to the carb just look at the current setup on your bike and copy it).
Materials needed:
*Phillips and flathead screwdriver
*Needle nose pliers
*Digital Camera (take pics before you take things apart so you will know what it looked like before you tore things apart, makes assembly a lot easier if this is you first time).
Install process1. Cut out one end of the fuel line and connect the fuel filter. (Be careful about how much fuel line you are cutting you don’t want to run short).
2. Connect the other end of the filter to the fuel line to the carb.3. Install the fuel line and filter to the gas tank, make sure there are no kinks in the fuel line.4. Assemble your bike back and start it up to make sure everything is working fine.
5. 11pm on a weekday go ride through residential areas :) my neighbor hood loves me.
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Thursday, September 25, 2008

How to do gas oil mixing for Pocket Bikes?
Alright for the newbee this can be a challenge it was for me with my first 2 stroke bike.Two stroke engines do not have an oil tank and gas tank there are pocket bike that do but most don’t especially in 2 stroke. There are ways to calculate the oil gas mixture but there are easier ways to do this.
All you have to really know is the following.
Go to your local Walmart and go to the garden center. In the garden center you will find 4 and 8 oz bottles of two stroke oil. If you have a new bike you will see a sticker most likely that says 25:1 ratio what this means is put in about ¾ of the 8oz bottle (to be on the safe side I would just use all 8oz to much will not hurt you as to little will) into a gas canister. You also have to remember the companies that made these little engines did not spend millions on research and development and have laser cut metal so 8oz is the safer way to go.
How to mix
Dump the 8oz in a gas canister
Put 1 gallon of 91 octane gas in the canister
Shake the canister a little (softly not hard)
Place mixture in your gas tank after you let it settle for a few minutes.
Always remember for best performance turn on your bike and let it run for a couple of minutes before you start riding.
Hope this helps have fun riding and stay safe.
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Wednesday, September 17, 2008

Mini bike gear ratio 101
Want faster take off or top speed? Below is a simplified explanation no math involved. If you need an example just take a look at your 10 speed bicycle or what ever speed you got. See which gear setup gives you good top speed and which gives better off the line acceleration.Simply put it:>Larger clutch sprocket powering smaller rear wheel sprocket and you getmore top speedless torqueslow take-off>Smaller clutch sprocket powering larger rear wheel sprocket and you getless top speedmore torquefast take-off
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Tuesday, September 16, 2008

Removing a mini bike electric starter
Removing a starter is a simple process. Follow the 6 steps below. Before you start take a digital camera or pen/pencil and note pad to take notes on how you are removing the electric starter. This procedure does require some mechanical skills. Now the electric starter is not self contained like a car starter its kind of weird it’s a coil integrated into a frame. Removing the electric starter can help reduce about 3 – 4lbs off the bike and also the engine does not have an extra resistance attached to it while it spins the shaft. In case you plan to attach the starter back or are just simply replacing a defective one keep note of how you are taking it apart in the first place.Taking it off:1. Remove the four pull start screws.2. Next pull the pull start off.3. Remove the ~4” chrome bolts.4. Pull the starter out (it holds tight requires some force)Putting it on: Just work in reverse (Remember I said take note of how you took it off).1. Put a couple washers on the threaded side of the four inch chrome bolts and then screw them in.2. Put the pull start back on in reverse procedure you took it off. This is where the digital camera and note pad come in handy.In case you decide to not put the electric starter back on sometimes the pull start cable won’t pull or the string will not go in side then you need to add a spacer to the chrome bolts to push the pull start further out try some washers.
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Friday, September 12, 2008

How to Install Pocket Rocket Boost?
How to install a boost system on your pocket rocket.This is a great way to give your bike a little pick up. “With the simple instillation of a Boost Bottle kit, your bike will be leaving the others in the dust”. I have head this before but if you are dealing with a 49cc engine this is not all that true. The boost will if installed and sized properly give you a gain in power.How does a boost work?Myth: There is a mixture substance in the bottle like a nitrous system in a car.Fact: The whole system works off of a back pressure. The boost bottle connects to the carb via a modified manifold. When the engine runs the boost can fills with air creating back pressure causing a bunch of physic’s leading to a supercharge type of effect at the end you get some more power.The key here is the, size of the bottle make sure you get the right size bottle that goes with your engine size. Double bottle is not necessarily better then single in this case.1. Manually empty fuel tank completely.2. Shut fuel value off on carb and disconnect the fuel line from the carb.3. Locate the throttle cable connected to carb. disconnect throttle cable from the carb by loosening the screw and spring holding the throttle cable in place.4. Unscrew screws attaching the air box/air filter to the carb to remove the air box/air filter. Keep it clean sure to not get any dirt into carb.5. Remove two long screws holding carb to manifold. Be sure to not lose the gasket between carb and manifold, you will be needed again.6.Remove the manifold by unscrewing the four screws securing the manifold to the engine. Once again, be careful with the gasket between the manifold and engine. Put the removed manifold aside.7. Install the brass valve on the new manifold, and place old manifold gasket on new manifold so the carb.8. To install the manifold, carefully place it against the opening in the engine, ensuring the brass valve(s) are facing down. There is only one way the manifold will go on, so don’t force it. The opening for the carb should be parallel with the ground. Replace the 4 screws9. Connect the hose to the manifold by pushing the hose over the brass valve on the manifold. Make sure to push the hose all the way up the valve.10. Reinstall the carb by aliening the body of the carb (opening) with the opening on the manifold. The fuel bowl of the carb should be towards the ground. Replace the two long screws that were removed before.11. Reconnect the throttle cable to the carb by tightening the spring and screw.12. Reconnect the fuel line to the carb by pushing it over the fuel valve on the carb. It is a good idea to put a zip tie around the fuel line to secure it to the carb to avoid fuel leaks.13. Reinstall the air box/ air filter to the carb by holding the air box with the openings towards the ground and aligning the air box screw holes with the threaded holes on the carb. Replace the two screws.14. Attach to boost bottle by pushing hose over the brass valve on the boost bottles.15. Use zip ties to mount the boost bottle(s) to the frame of the bike. The bottle must be mounted at a level above the carb to function properly. Recheck all screws to ensure all components are tight.16. Fill bike with fuel and start bike up to check to make sure throttle works properly and there are no fuel leaks.17. Now you are ready to ride.
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  1. Which fuel hose goes where it has a primer button and two hose's one small the other just a tad bigger

  2. Which fuel hose goes where it has a primer button and two hose's one small the other just a tad bigger

  3. The long hose that goes clear down into your tank goes onto the straight shaft prong. That's fuel supply.the short one goes on the elbow shaped one. That's return.

  4. I have a older pocket bike that looks like a motorcycle it's a 49 mL four stroke engine what oil is best To mix with the gas 49 cc