206 rpm indicator problem acilll

When my friends vehicle is at 1,000 rpm, it makes strange noises. trembles and sounds like iron. however, there is no problem below 1,000 cycles and above, just 1,000 cycles. (The engine's top cover has been rectified before that, and it still exists.) Has anyone ever encountered such a thing before? in this way for about 6-7 months.

Look at the roller bearing of the triger, there may be a problem in the triger.

206 1.4 x-desing

have no idea

the same I had in me. I changed the fan apricot passed, brother. & nbsp;