Hi guys

I have a honda cbr 125r(2004) and i got into a accident with it about 6 months ago (broke my hand and a leg),i didnt ride it for that period of time.

Now when i started riding again it wont go past 110 km/h(befor the accident it would go 130 no problem but now it struggles to go even 110) even if i go downhill it just can't.

Cleaned the carburator and changed the air filter looked for any leaks and there isnt any , checked my valve clearance and its okey , my speedometer is working fine i tested that too, so now i don't know what to test anymore the bike runs fine, starts up fine even when cold soo yeaa.

Thanks in advance for and help I'm new to motorcycle and kinda bad at english so sorry.

 

Greetings & Salutation!!! Your English is perfect! 👍

There might be something bent from crash that's adding extra friction. Measure:

- brake-rotors run-out
- brake lever/pedal dragging and not returning
- measure drag from wheel-bearings
- front/rear wheel alignment

 

Any damage from the crash? Dings in your exhaust for example? Did you replace any parts?

 

Thank you!

​​​​​​Okey i did everything today and here it is:
break-rotors are within spec, break lever is returning, how do i measure wheel-bearing drag ? and the wheels are aligned.

 

Hmmm forks tubes were bent so i replaced that and the thing that holds your blinkers was too besides that other stuff is just plastics

Took my exhaust apart it's pretty clean

 

raise one wheel, then other

At outer edge of tyre, grab and push down to spin wheel. Does it spin easily and smoothly? Can attach weight to tyre and measure how much force is needed to spin wheel. Probably not needed.

Repeat for other wheel

 

Spin the front wheel when it's off the ground - it should spin freely. Rear wheel as well, you should not feel any tight spots. If there's any drag the wheel hub will get very hot after a few minutes of riding.

Bent fork tubes might have resulted in a bent yoke as well, which could certainly cause pressure on the front wheel bearings.

 

Rear tyre spins good but front tyre seems to be getting some drag on one part the most but other not so much(but there is drag almost the hole turn besides one part of the turn where its harder)

 

Front wheel doesn't spin freely, the rear does(the hub doesn't get warm even after 30 minuts)
Yoke was bent and i didn't replace it, new forks didnt want to go(one went in and other wouldn't match with upper yoke part) in sooo we kinda heated it and snaped it(by snapped i mean heated it and hit it a čot of times and tryed to fit in the forks) in place back so forks go in kinda smooth now

 

“Kinda smooth”.

Houston, we have a problem….

I think you know where the problem lies now?