בכידון המקורי יש שריטה.

It is made of:

• ב־ = in / on / at
• כידון = handlebar (or a similar part, depending on context)

So בכידון literally means in/on the handlebar.

In this sentence, English will usually translate it more naturally as something like the original handlebar has a scratch or there is a scratch on the original handlebar.

Because Hebrew prepositions often absorb the definite article.

So:

• ב + ה + כידון becomes בכידון

In pointed Hebrew, בכידון could be pronounced differently depending on whether it means in a handlebar or in the handlebar. In normal unpointed writing, both are written the same way.

In this sentence, we know it is definite because of המקורי: the adjective is marked as definite, so the noun phrase is understood as the original handlebar.

Because in Hebrew, if a noun is definite, its adjective must also be definite.

So:

• כידון מקורי = an original handlebar
• הכידון המקורי = the original handlebar
• after ב־, that becomes בכידון המקורי

This is a very important Hebrew pattern: adjectives agree not only in gender and number, but also in definiteness.

כידון is masculine singular, so the adjective must also be masculine singular:

• מקורי = masculine singular
• מקורית = feminine singular

That is why the sentence uses המקורי and not המקורית.

Hebrew usually does not use a normal present-tense verb for to have the way English does.

Instead, it often uses יש + the thing that exists, sometimes with a location or possessor.

So literally:

• בכידון המקורי יש שריטה
• In/on the original handlebar there is a scratch

Natural English:

• The original handlebar has a scratch
• There is a scratch on the original handlebar

This is a very common Hebrew structure.

Because the sentence is introducing a scratch, not referring to a specific scratch already known to the listener.

So:

• יש שריטה = there is a scratch
• יש השריטה would be ungrammatical here

If you wanted to refer to a specific known scratch, Hebrew would usually phrase it differently.

Yes, English would usually say on.

Hebrew often uses ב־ in places where English uses in, on, or sometimes even just a more general location marker. With things like damage, marks, holes, scratches, and defects, ב־ is very common:

• יש שריטה בדלת = There is a scratch on the door
• יש חור בחולצה = There is a hole in the shirt

So even if English says on the handlebar, Hebrew can naturally say בכידון.

Yes, יש שריטה בכידון המקורי is also possible.

Both are grammatical, but the emphasis is a little different:

• בכידון המקורי יש שריטה
  This puts the original handlebar first, often giving it more focus or contrast.
• יש שריטה בכידון המקורי
  This is a more neutral there is a scratch... order.

Hebrew word order is more flexible than English, especially with sentences using יש.

A natural pronunciation is:

ba-kidon ha-mekori yesh srita

A useful detail: in unpointed Hebrew, בכידון could in theory be read as be-kidon or ba-kidon, but in this sentence the meaning is definite, so it is understood as ba-kidon = in/on the handlebar.

Yes, very possibly.

Because the sentence says בכידון המקורי and even places that phrase first, it can suggest a contrast such as:

• the original handlebar has a scratch
• maybe the replacement one does not

That contrast is not required, but the wording leaves room for it. Fronting the phrase can make it feel more noticeable or contrastive.