Hello first sorry for my english icant talk very well.
I'm thinking of buying cbr 125 and i have some problems in my head.

first can i ride with heavy passanger?and secondly can I make a long way?
​im (80kg) and my pasaanger (80 kg) my height 184 cm

 

The owners manual will give you max pillion and rider weights, they are hard work two up, 35 years ago I used to take my girlfriend on the back of my CB 100N it was slow progress!

 

Depends where you live Emir and how fast the local traffic is.

In the Far East, millions of people ride two-up on 125's.

In-fact I've seen 3-up and even 4-up in India

BTW welcome to the forum.

 

That little 125 will struggle with that much weight.

Go bigger if you want to go 2 up.

 

It is do-able and I have seen mum, dad and 2 kids on such machines in Asia.
But I think for your combination a 125 will be working hard and handling and braking would take some concentration.

I do not know where you intend riding but in busy urban environments as a rider for different periods of time I have been 2 up (Rider 75 kg + 60 kg pillion) on a Yamaha 175 trail bike and I found that handling and braking took some concentration from me.

And 2 up (rider 75 kg + 75 kg pillion) on a Honda 250 trailbike and I found that this combination was fine.

 

first thanks for all comments!

my passanger is my mum.my old motorcyle bajaj discover 125 st maybe you have never heard of it in your life.it was a very unbalanced ride with this weight.i sold him out.
i ride in istanbul.

 

I know what a Bajaj discover is mate and understand what you mean. I am from India you see, just staying in the Uk for now
I think the biggest problem with these puny 125s is not really the frame or the motor. You can make slow progress even on a small 100 if you are within the recommended weight limit. Problem is suspension. I am not sure if the Bajaj had an option to increase the preload to make the rear harder, of course the front is never adjustable on these bikes are they?
You need to check if CBr125 has rear shock adjustable for preload. If it is, then the hardest setting would do just fine.
Incidentally the CBR600f I have only has around 200 kg rated weight capacity, so an engine which is about 10 times more powerful doesn't mean 10 times the weight carrying capacity