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2008 Sym Jet Euro X 50 Questions & Answers
The speedo on my SYM eurojet 50 doesn't work, it always stays on zero. Any help?
As with all bikes, if the speedo isn't working it depends on the type. If electronic then could be a faulty sensor or pick up, but if cable type (which yours more than likely is) it could be a broken cable.
Unscrew the speedo connection at the front wheel and remove the inner metal cable. It should come out in one piece with the end parts attached. If it doesn't then it will need replacing. If it wont come out at all then the inner and outer will be a "one piece" unit. In which case spin the end with thumb and forefinger see if it registers on the readout. If it doesn't it will need replacing as the cable is faulty. If it does register then it may be the drive that is faulty. This is where you unscrewed it from the wheel.
Here's what one looks like:
http://www.ebay.co.uk/itm/SYM-JET-50-AND-EURO-JET-FRONT-WHEEL-SPEEDO-DRIVE-CABLE-/271947170964
I cut my green wire
Join it up again. These things are designed for a function, brakes, engine and cvt are made to operate at a certain level, if you try to make it work at a higher level, it becomes dangerous. If you want speed, buy a bigger machine.
I am investigating the crash
Front wheel wobble is common on full sized motorcycles. It is very similar to a front caster on a shopping cart starting to spin in the caster axis instead of the wheel spinning. Some cases of "wobble"get so bad at higher speeds that you actually get "slapping" where the handle bars violently move back and forth so fast the rider cannot hold onto them and they swing from bar stop to bar stop ( sometime hitting the gas tank if barstops are bent or removed). It can be caused by a bad bike design but most bike designers after 1990 have taken care of this issue. Small font tire, almost vertical forks, poor weight distribution (not enough weight in front) can all cause wobble. It usually gets worse or more likely to happen the faster one goes.
Some things cannot be accounted for at design so some extra parts are available to further eliminate wobble - most common is a fork damper. Basically a shock absorber between one fork and the frame and are usually mounted above the gas tank on top of the fork tube.
These are necessary when carrying heavy loads that are mostly in the rear of the bike (passenger plus saddlebags). Also, some high speed bikes with windscreens / farings can shift the effective weight distribution with down forces caused by the wind on the faring.
Finally, worn or under inflated tires can cause the wobble.
Once the oscillation starts, it is difficult to dampen with brute force. In most all cases, the solution is to lighten the grip on the handlebars and coast until speed decreases to a level were the rider is strong enough tO overcome the oscillation.
Scooters with passengers are ideally set up to oscillate and wobble with the small wheels. If the built in speed regulators are disabled on the 49cc model, a passenger is involved and / or under inflated tires could all create a perfect storm to create wobble.
Good luck
-Mark
I h
HOW TO CHANGE REGULATOR ON SYM 300
To change the regulator on a SYM 300, you will need to follow these steps:
- Turn off the engine and remove the key from the ignition.
- Locate the regulator, which is typically located near the battery. It will be a small box with wires coming out of it.
- Disconnect the negative battery cable to prevent electrical shock or damage.
- Unplug the wires from the regulator. There may be a plastic clip or tab that needs to be released to remove the connector.
- Remove any screws or bolts that are holding the regulator in place.
- Carefully remove the old regulator and discard it.
- Install the new regulator in the same position as the old one. Make sure it is securely in place.
- Reattach any screws or bolts that were removed and tighten them securely.
- Plug in the wires to the new regulator. Make sure they are connected correctly and securely.
- Reconnect the negative battery cable.
- Turn on the engine and test the new regulator to make sure it is functioning properly.
It is important to follow the manufacturer's instructions and safety guidelines when working on any vehicle. If you are not comfortable working on your SYM 300, it is recommended that you seek professional assistance.
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