Troubleshooting > Failures par brand > GILERA > My GILERA 50 motorcycle grazes

My GILERA boxed motorcycle grazes

Your mà © caboîte 50cc GILERA grazes when you ride? This can be due to several issues. It is possible that your machine will graze when you are driving at 60km / hpar example, or when you are just starting out. In 90% of cases it is a problem gasoline. Indeed, if there is too much gasoline in your engine, it will be difficult for you to obtain optimal performance.

low speed Gilera

Your GILERA grazes at a low speed

If your GILERA motorcycle grazes at low speed, the problem is probably due to carburettor. In fact, most of the time it is a main jet too small. It depends on the modifications you have made to your GILERA but you are probably too poor in fuel.

Example: You have a GILERA motorcycle with an original engine. You decide to install a new exhaust and a 50 carburetor. Your machine will graze at low speed if you leave the nozzle on 19 (original). It will rather be necessary to pass on a jet of 75, see 85 or 90.

It is also strongly recommended to check the good condition of your spark plug . If the problem persists, perform a carburetor adjustment. Finally, it can also be a cylinder head gasket damaged. In this case, it will have to be replaced (or have it replaced par a two-wheeler professional).

Your GILERA grazes at high speed

If your GILERA motorcycle grazes at high speed, the problem is also due to the carburettor. Indeed, most of the time it is a matter of gasoline. It depends on the modifications you have made to your GILERA but you are surely too rich in gasoline.

Example: You have a GILERA motorcycle with an original engine and a 50 jet on your carburetor. At high revs, your machine has no more power and gives jerk when accelerating.

Start par check the condition of your spark plug, if it is black, this effectively means that you are too rich in petrol, you should try smaller nozzles. Going down from 5 to 5. Check the spark at the spark plug, the muffler (it may be clogged) and the condition of your air filter.

Also check the condition of your base gasket. Indeed if the latter is damaged, air arrives and this can cause your GILERA to graze.

Finally, be sure to add quality gasoline, this can be one of the causes of a GILERA which grazes.

high speed Gilera
mid-revs Gilera

Your GILERA grazes at half speed

If your GILERA motorcycle grazes at half speed, the problem is probably due to the carburettor. It is imperative to carry out a carburetor adjustment.

Start par adjust the richness screw while increasing the jet from 2 points to 2 points. You will quickly find the right compromise for your carburetor.

Finally, you can carry out an adjustment of carburetor needle (take it up a notch par example).

An electronic problem can also be the cause of a motorcycle that grazes at mid revs. Check the condition of the CDI box, electronic clamping and ignition if necessary.


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