I respect all your builds from bottom of my heart bro, seriously hats off to you, But i guess this post of you claiming under 4 secs to 100 is highly highly optimistic and even if its a drag build it cannot be achieved.
Even a stock R1 & R6 takes close to 3.5 to 3.7 secs to 100 with a good rider which belts out more than 1000bhp/ tonne and here we are talking about a 165cc setup, even if it weighs as low as 45-50 kgs the under 4 secs kinda sounds IMPOSSIBLE... I'd love to be proven wrong but....

Well, to understand that you really need to start strapping a v-box on drag machines.
Drag machines are not built like a street stock machine and they have a revised gearing unlike any road going bike. What if I tell you drag bikes, our puny 2-strokes are already doing 3-3.5secs to 100kph? I'm talking about indian RDs and the factory shaolin. Get ur facts right and then we'll speak.
An R1 is a street stock machine from factory and is not geared to be a drag machine. I'm targetting 4 secs to 100kph and it will be the first 4-stroke in the country to crack into this territory.
A drag bike is geared really tall in the first 2 gears. Basically u end up shifting only once to get to over 100kph. The other 3 gears are closely spaced to just do the task of carrying over the momentum.
There are 12 secs bikes in the country which are already doing some insane timings. You might wanna visit atleast once recent race.
I'm currently doing under 6 secs (dont wanna specify the time for obvious reasons) and I have a few more things to do before I crack into 5 sec flat in 3 weeks.
There is a lot to tuning an engine and building a race bike, than mere logics from other stock counterparts. Remember this is a purpose built bike. A stock superbike is more lavish on its purpose.
In the 80s, the turbo charged WRC cars were as fast as the F1 cars of those days. They were doing 2.5secs to 100kph on gravel. With a limited top-speed of around 250kph. Does that mean, the F1 car was making lesser power? Thats coz the rally cars were geared as such.
You can build a bike which does 100kph in 3 secs with a 40bhp motor. Wanna know how? = Gearing!

Chilll buddy, I didnt mean to offend you, I know what you are capable of.. so no need to explain till core..
All the very best to the South Indian Burt Munro..
Please do call me if you take your machine for a run!!
Cheers!!

what a change in opinion! I aint any Munro and I sure wanna prove your "Impossible" term sometime. I dont know whats your trip on all this though!

My opinion hasnt changed still , I still think even if its in an outright drag avtaar a 165cc naturally aspirated 4 Stroke with 2 valves cant do under 4 secs to 100 no matter how much u play around with the gearing..

^
This is atleast fine, its a 4-valve engine. What is mighty impressive is my 164cc Fiero which runs a 2-valve set-up, stock CDI and standard CV carb and as per my most recent tests does 0-100kph in under 6 secs and does a 400mtrs dash in 14.28secs @ 145kph.

Again, why assume dude. When did I say, it will be 2-valves only?

Now, Am i assuming something???
You didnt mention in that under 4 secs post that * Specs are subject to change without notice

Now, Am i assuming something???
You didnt mention in that under 4 secs post that * Specs are subject to change without notice