I randomly picked one shop with a boss who has got a bad mouth. I randomly picked one shop with a boss who has got a bad mouth.

I randomly pick one shop with a boss got a bad mouthed a shop, and ended up with a shopkeeper who was brutally honest . I randomly picked a shop, and ended up with a shopkeeper who was brutally honest .

I think 'brutally honest' conveys your 'bad mouth' and 'honest'.

Fixing My Bicycle II – An honest repairman Fixing My Bicycle II – An honest repairman

Whether 'a' or 'an' is used depends on the initial sound of a word, not on the initial letter of the word that they precede. If they have an initial vowel sound, we use 'an'. If they have an initial consonant sound, we use 'a'. 'Honest' has a silent 'h' so is considered to begin with a vowel sound.

Yesterday, I fixed a few problems ofwith my bicycle. Yesterday, I fixed a few problems with my bicycle.

Yesterday, I fixed few problemdid a few repairs ofn my bicycle. Yesterday, I did a few repairs on my bicycle.

But some parts arhave “wear and tear” problems. But some parts have “wear and tear” problems.

But some parts are not fixable. They suffer from “wear and tear” problems. But some parts are not fixable. They suffer from “wear and tear”.

I just have to replace those with new parts. I just have to replace those with new parts.

I just have to replace them with new parts: Handle bar, seat and brake. I just have to replace them with new parts: Handle bar, seat and brake.

The 'sentence' below is not a sentence, so it makes more sense to include it as part of the sentence above.

Handle bar, seat and breake. Handle bar, seat and brake.

But picking a repair shop can be difficult, because most repair shops are dishonest. But picking a repair shop can be difficult, because most repair shops are dishonest.

They overcharge the fees and push, and they encourage you to changebuy new parts which are notbefore they are necessary. They overcharge, and they encourage you to buy new parts before they are necessary.

Overcharge implies prices (fees) so you don't have to say that part.

He told me my bicycle looksed ugly. He told me my bicycle looked ugly.

He told me my bicycle lookis ugly, but it still works. None of the parts need replacement. He told me my bicycle is ugly, but it still works. None of the parts need replacement.

'But' is usually not a good beginning of a sentence. You are using 'but' to connect 2 thoughts, so it's better to actually put them in the same sentence.

But all the parts don’t need to be change because they still works. But all the parts don’t need to be change because they still work.

He even fiximproved my break to better conditiones without chargesing. He even improved my brakes without charging.

He even fixed my break to better conditione without charging mes. He even fixed my brake without charging me.

You don't say 'fixed... to better condition', and you don't need to. If it's fixed, obviously it is in better condition.

And advised me that there was no need to come in again in a months time. And advised me that there was no need to come in again in a months time.

And advise meHe told me there was no need to come again in a month's time. He told me there was no need to come again in a month's time.