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11

Background While various items such as maintenance and ease of tire removal are cited for the SSSA (Single Sided Swing Arm) design, initial testing and development of all these designs were started on the racetrack. Honda initially released their version of the SSSA with NSR250R. image of an NSR250R All of the early SSSA's were developed for racing ...


7

Its really simple. Gloves for both active protection - they stop you getting slippery hands and crashing. And in the end of a crash they stop your hands being smeared on the road. Alternative grips will also be available such as these Renthal grips, with a coarser grip pattern they should stop being so slippery even with sweaty hands. Personally I ...


6

As a 35 year veteran motorcycle rider and owner of 15 different bikes during that time, while I don't dispute the unsprung weight argument made by DucatiKiller, I can tell you that there is a much, much, much more practical reason for using a single sided swing arm: It dramatically simplifies chain maintenance. You see, with a double sided swing arm, you ...


5

Your experiencing fouled plugs. Fouled plugs have carbon buildup that grounds the electrode of the spark plugs over the ceramic with carbon. The carbon buildup occurs because the AFR (Air Fuel Ration) is too rich. This makes the combustion process, when you fuel is burned, too cool. Since combustion is too cool carbon buildup occurs on your sparkplug and ...


4

Based on my limited knowledge on scooters courtesy of owning one for about 3 years and assuming your scooter is carb and has similar mechanism (BTW not able to Google your make and model it's rare) First of all check the carburettor. If the carb is blocked then you will notice the symptoms which you have mentioned , blockage at higher throttle. Check the ...


4

It depends on the oil that you use on your scooter, If you are using heavy oil then the cold start is going to be a problem, I have a 150 cc Gy6, I use lighter oil like 5w-40 and I had no problem, but if you are using any other oil that has higher viscosity than 5w-40, you better switch back to the 5w-40. The manual suggests 75w but most people use 5w-40. I ...


4

How the choke works The choke of a scooter consists of a dedicated choke nozzle in the fuel reservoir and two narrow drillings leading to the venturi (the pipe where the air goes through): When the motor cranks and the choke is active, the slight underpressure in the venturi sucks in extra fuel through this drillings. When the choke is inactive, a ...


4

The information provided by DucatiKiller is excellent. I believe the biggest advantage is access, which makes wheel changes and maintenance arguably easier. This could also translate to pit-lane advantage in racing situations. Particular case - in the case with Ninja H2R - Having a single-sided swingarm allows the exhaust pipe to be mounted ...


3

What is the most probable cause for this? In the most general terms, the engine isn't running because there is either too much air or too much fuel. Can the cause be that the machine was not in use for some months? Is it true that petrol may "become old" after some month so it does not burn anymore correctly? It is possible, especially if the ...


3

Instead of recreating the wheel, here are some pretty good reasons why you need to do a break-in on any engine, be it a motorcycle or a car. I found it on this page. I don't necessarily agree with everything the person says on the page, so I'll leave the rest of the reading up to you. The What: Every new engine has internal components that must be ...


3

The two hoses in question can be identified by using a can of carburetor cleaner with the red hose attachment and squirting into the nipples for the hoses to see where the fluid emerges. I suspect the nipple on the top of the carb by the auto choke could be a vacuum line. This is frequently where they are placed. The vacuum line may need to goto a ...


2

I'm making my former comment an answer so that I can put pictures to explain better. First, don't mess with the grips. If they work fine with your hands dry then they don't need anything. If they don't work with dry hands, then do something to them, because using gloves shouldn't help much in that case. Then, going to the gloves subject. Even if you ride a ...


2

Here is the official Piaggio service manual. Piaggio MP3 250 Shop Manual


2

Sometimes A float gets "waterlogged" (so saturated with fuel that it just won't float anymore.) The float could be bent in position. Worn tip on float needle Worn o-ring in the float seat Excess dirt and varnish in the carburetor. (Varnish deposits occur when fuel sits too long..) The best thing to do is remove and examine the carburetor. Take it ...


2

Plug Here is a link to an answer concerning spark plugs. If you cannot place your's against the chart, please post a picture and I can help you further. Make sure the spark plug is gapped correctly. Points As @DucatiKiller pointed out in this other question of yours, check the color of the spark coming from your spark plug when not installed in the engine. ...


2

It would be nice to see some pictures of your carb, because each carb is different. But let's see... There's usually a drain screw at the bottom of the carb, which allows to drain accumulated water and/or fuel from the floating chamber. There's typically a port for a hose, which just leads to the ground. I.e. this hose is not connected anywhere. If the ...


1

As you doubted the trouble was with the float. I would like you to remove the bottom cup of the carburettor and remove the fuel and gently blow some air to the float and to the jet. Make sure not to disturb the Air or Fuel Screw. If you disturb it, it will be the difficult task to tune it back to normal by you. Now gently tap the float and make it free. ...


1

It's the secondery ingnition system. It is getting damp and is missfiring at ether the coil. the wire or spark plug boot or even a cracked spark plug itself. The next dry night spray a fine mist of water at these componets when its running and you will see the high energey arc or spark at the point of High Kv leakage.


1

Had a similar problem with my Pajero (1992 Turbo 2.5D). Replaced the battery and the problem went away for a couple of days but started occurring again, especially on cold starts early in the mornings. One thing that bugged me was that if I attempted to push start it, the starter suddenly fired up just fine if I killed the engine and attempted to start it ...


1

As was noted in the comments, the problem is probably that there is a key in the splines and the pulley which needs to be aligned in order for it completely fit onto the shaft. While this is not your piece, it will show you exactly what I'm talking about. The splined area has a keyed area which is visible: The crankshaft will have one which is opposite ...


1

I think the fuel pump is a good place to start. I believe this scooter doesn't actually use a fuel pump, but a fuel diaphragm. I found two versions on this website which should be for your scooter.


1

Usually Vespa PX will give approximately 30-35KMPL, since you are getting 25KMPL I recommend you to check the air filter and the spark plug. This particular model is not available in our country, so I may be wrong somewhere. But I am giving you the basic tips which is suitable for all the automotive. Check the air filter if it is too much dusty or ...



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