Can you adjust the front brake lever on a motorcycle?

Most motorcycles have no provision for adjusting the engagement point for front brakes. However some newer bikes do have an adjustment...an obvious adjustment "wheel" will be found near to the lever. If indeed the lever engages too close to the bars it can be the rubber flexible line leading to the front wheel....as in the "rubber line" is expanding as one applies force to the lever. The rubber can be deteriorated, needing replacing, or can be replaced with a braided steel line lending toward a firmer feel.