The engine produces maximum total output at 7000 rpm. By total output, I mean the total rotation potential of the engine.
It can surely go beyond that, maybe upto 8000 rpm.

Yes, big bores and other performance enhancing mods can deliver more bhp at 7000, or maybe slightly lower or higher rpm too.


See, I think you're confused with what exactly Big bore is.

Big bore means to change your piston to a bigger diameter one, and drilling the cylinder bore accordingly so that the piston fits it with roughly the same clearance as before.

A piston's size depends on the cc of the vehicle. And its usually from 40mm to 75mm. ok? can not be 1 mm at all, no matter what.


CDI supplies current to spark plugs and cuts the spark on rev limiter so that the vehicle can't rev beyond it. Programmable CDI's can take you to beyond rev limiter.
But they must be specially made for your vehicle as for different rpm's, different current is needed. Also, CDI's connector slots may or may not be compatible.

I don't think you need that as you're not riding a geared bike on a racing track, where an overrun beyond max power spot is helpful when there's just a corner approaching and gear up shifting and then shifting down, will take more time.
Most bikers consider the rev limiter as their enemy, while its not so really... I suggest you leave this idea, as yours is an ungeared bike, it won't bring any performance gains.

@samarth

i understood what big bore is
CAN U SAy me About PORTING AND POLISHING ?
i mean what is it
.
my mechanic showed me also
its 1mm only

and even on piston its written 1mm and even the cylinder work guy did 1mm setup for the block

and even on the piston ring cover it was written 1mm only
.
.

so i dont need a cdi ?

HI, check this http://www.xbhp.com/talkies/help-me/...oubt-rpms.html

Porting is a processes of modifying the intake/exhaust ports of an engine.such as increasing its size or even changing the angle of flow i guess.
Polishing is the process of smoothing and giving the ports a mirror finish.

means just increasing the port sizes can increase the power of the bike ?
can u please throw some light on this porting more please

anybody ?