Reviso el freno y el manubrio.

Reviso is the first-person singular present indicative form of revisar.

So:

• revisar = to check, inspect, review
• reviso = I check / I inspect

In this sentence, it means something like I check the brake and the handlebar.

Spanish often omits subject pronouns when they are not needed.

Because reviso already tells you the subject is I, adding yo is usually unnecessary.

So both are possible:

• Reviso el freno y el manubrio.
• Yo reviso el freno y el manubrio.

The version without yo is more natural in many normal contexts.

Spanish uses definite articles (el, la, los, las) more often than English does.

So where English may say:

• I check brake and handlebar in a list-like style,

Spanish normally says:

• Reviso el freno y el manubrio.

Here, el freno and el manubrio mean the brake and the handlebar as specific parts being checked.

Yes. Both nouns are masculine singular, so they take el.

• el freno
• el manubrio

That is why the sentence does not use la.

Manubrio means handlebar.

In Latin America, manubrio is understood, especially for things like:

• bicycles
• motorcycles
• some scooters or similar vehicles

However, vocabulary can vary by region. Another word you may also see is manillar.

So:

• manubrio = handlebar
• manillar = also handlebar, depending on region

Good question. El freno is singular because the sentence is referring to a brake or the brake system as one item, depending on context.

Spanish often allows this kind of singular reference when talking about a part or mechanism in a general way.

If you specifically wanted to say the brakes in plural, you could say:

• Reviso los frenos y el manubrio.

So both can be correct, depending on what exactly is meant.

Revisar is a very good, standard verb here. It means to check or inspect.

Depending on region and tone, other possibilities exist, such as:

• checar = to check
• verificar = to verify/check

But revisar is neutral, common, and widely understood across Spanish-speaking countries.

It is in the present indicative.

Reviso can mean:

• I check
• I am checking (depending on context)

Spanish simple present often covers both a habitual meaning and a current-action meaning, while English often chooses between I check and I am checking.

No. The word order is very straightforward.

It follows the normal pattern:

verb + object + y + object

• Reviso = I check
• el freno = the brake
• y = and
• el manubrio = the handlebar

So it is a very standard Spanish sentence structure.

Spanish normally uses y for and.

It changes to e only before words that begin with an i sound, such as:

• padre e hijo

Since manubrio does not begin with an i sound, the correct conjunction is:

• el freno y el manubrio

A simple pronunciation guide is:

reh-BEE-soh

A few helpful points:

• r at the beginning of reviso is a Spanish r, not a strong English r
• v in Spanish sounds closer to a soft b/v sound
• stress falls on vi: re-VI-so

Yes. By itself, the sentence does not specify exactly what object it is.

Because of freno and manubrio, it could naturally refer to:

• a bicycle
• a motorcycle
• another vehicle or device with a brake and handlebar

The exact meaning depends on context.

Yes. That version is also correct.

The difference is:

• Reviso el freno y el manubrio.
  = I check / I am checking the brake and the handlebar

• Estoy revisando el freno y el manubrio.
  = I am checking the brake and the handlebar right now

The second version makes the ongoing action more explicit.