Jithu

Hai all .. I need some help.
I am using a 2007 April model Karizma (19 k kilometers) for last three months ..i bought it second hand ..
The bike is fully in stock condition (except the 55/60 w Philips extreme power headlight I fitted).
After i got the bike I had to change many parts including clutch plate , clutch plate assembly (full), cam tenser and some other stuffs (and some body parts too including front cowl ).
Now The bike is running smooth and fine and got a max mileage 42 , min 28 and giving me constant 35 avg mileage . I really love the bike and now addicted to it especially the way it cruses on 80 at 5 k RPM .
I am now working in Chennai and I went to Pondicherry , Bangalore and some other Road trips with the bike and it is simply awesome for touring .
But now I am facing a problem the bike is not getting a good top end . I have touched 130 on it but the problem is the bike is showing variable top speed. Most of the times it is not crossing 110 (with pillion)
And sometimes it got stuck at even 100 (Rpm around 6k not going above) . The Rpm is not going above 7 most of the times (at 5 th gear) . But the initial pick up is good. it will touch up to 100 easily but after 100 the performance degrades .The confusing thing is that in my pondi trip I touched 130 with pillion(Rpm 8) and on for first two hours on the Bangalore trip the bike was touching 125 but after two hours it refuses to go above 110 whatever I do . These days the bike is stuck at 110 top speed . I am really wondering what’s wrong with my bike . I took it to one Mechanic, told my problem but after servicing also the problem exists After that I tried two Hero Honda service centers but no change.
Can anyone tell me what will be the problem? (or which part of the bike wil be the probably cause) Can any chennai Xbhpians help me to find a good Karizma Mechanic ?

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