cant get past 7000 rpms

[acez1659]

I have a 2010 megelli 250r. I have a problem where the bike seems to run fine but once it hits around 7000 rpms it wont rev any higher and also wont accelerate any further, even with the throttle completely open. There is also a really rough vibration from about 5000 rpms and gets worse the higher the rpms.

I also just had a major service. However the problems been happening since before the service

[acez1659]

Also I think I can hear a rattling sound while riding

[moonzoomer]

Check your oil level and filter for starts, I understand these chinese built bikes are copies of the Honda CBR250R single cylinder engine so do not expect good build quality. I would also check big and small end for play, check valve gear, cam and valve clearances, failing that check the carb/injector for defects and also check the air filter for blockages/fitment.

[Raggadubz]

I'm having a similar problem with my CB125TDE. It revs up to about 5-6000 and won't go any further. Getting to 5000 rpm is ropey too. Would the above apply for me?
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Honda CB125 TDE
DB50QT-11 Scooter

[acez1659]

[russell210276]

$250 for a re jet ????????

[acez1659]

[Visordown]

Does it get better or worse with the choke on?

At first it sounds like it could be running really rich which would cause it to struggle to get high in the revs and stutter but the knocking noise is worrying. Would be handy to see if you can narrow down where the noise is coming from.

[Matt-]

Don't worry to much about the RPM not going over 7000k RPM

I think your biggest worry is going to be the vibration, Vibration as you say are mainly caused by Big end bearings worn, which will require a bottom end rebuild, if your not mechanically minded i would recommend taking it back to the dealer, as it's a fairly hard job if you don't know what your doing.

But check filter's and valve clearances as above said, their quite easy,
if it seizes you can take it back and say WTF is this.

Hope this helps
____________________
RIP jack (wheelie king), you will never be forgotten.
Current Bike's - Road Legal TZR 125 Pitbike, Aprilia SR50R 2010

[gandy666]

fuel pipe kinked under the petrol tank when they put it back together?

[acez1659]

[acez1659]

[acez1659]

[acez1659]

I just took it for a ride and tried revving in neutral and seems I can deffinantly get past 7k rpms and most likely redline. However riding past 7000 rpms is almost impossible as the vibrations are too strong.
So thinking it might deffinantly be the engine at the point? With the rattling and high vibrations?