Dude... Those blogs n news was a speculation as we were expecting a mileage mill on lines of XCD but they or we never knew about this new engine... So 10 Bhp was then Justifiable... Mate as You refer to those YZF's, CBR's, GSX's, Ninja's compare their power to weight ratios with that of P135.. U will come to know why I felt it a gimmick...

Dude i was refering to CBF125R not the stunner one



Mate... Yes you are right... Adreno and Energy were screamers but when You compare with those age bikes... Similarly when You compare P135 as it is launched as Performance bike and not a mileage churning bike... So we can expect much more...

Dude... Don;t be confused... This engine has 2inlet valves if i'm right... And in such case it has approx twice or atleast the area available at inlet will be more than a single inlet valve hence the amount of fuel intake too will be proportionally high compared to single valve... So if we go through basics at least theoretically it has to deliver much better power and torque numbers when compared to 2valve engines with similar displacements... Hence I felt it as gimmick (even a 2valve Discover too produces very close power and torque figures though it is has mileage mill) as I was expecting for lot more performance boost... I have been through facts before my write up... Personally I'm a big Pulsar fan...

Even a 2valve engine can be rev friendly(read other pulsar or TVS RTR) though as you said even engine design matters...

Dude to compare(I know its not a perfect comparison) CBF125R ( don't confuse with CBF 125 Stunner)produces just 13BHP(which is even less than discover and its a 2V engine and a full 10CC less) It is very rev friendly(Very strong power and torque curves) and much faster and great performer than P135... Now this is Engine design... Hence I referred P135 4V concept as gimmick... Bajaj could have done much better Job...

Coming to point of stickers and engine guards... Yeah its gimmick... And this gimmick works with HH... because people trust it... And Bajaj has shown it in its new Bike by coping the styling for the Bike...( Bro... don't separate me n U by company WE r BIKERS, WE love Bikes...)

I did not mean to make a hard statement intentionally instead it was my disappointment... Sorry that I knowingly or unknowingly hurt any Biker here...and similarly I request to respect others feelings than just rubbish it off without understanding...
Hope I have made it clear... Any suggestions are welcome...



Seems to be a small misunderstanding...( thats ok dude no need apologies) I was speaking about CBF125R

Honda CBR125R :
Engine: a/c, 2v single, SOHC
Displacement: 124.7cc
Bore x Stroke: 58 x 47.2mm
Compression: 11:1
Carburation: 28mm VK carburettor
Gearbox: Six-speed, chain
Power: 13bhp @ 10,000rpm (claimed)
Torque: 8lbf ft @ 8,250rpm (claimed)
Cycle Parts :
Chassis: Steel tube twin spar
Suspension: (F) 31mm telescopic forks (R) monoshock
Brakes: (F)276mm disc, dual-piston caliper (R) 220mm disc, single-piston caliper
Wheels/Tyres: Cast aluminium/IRC (F) 80/90 17 (R) 100/80 17
Rake/Trail: 25 degrees/88mm
Wheelbase: 1,294mm
Fuel capacity: 10 litres
Kerb weight: 127.3kg

In its making... I meant when in its design stage

ok heres wat i wanna knw ! can this number plate setup be used on a 220 ?????? would it be a direct fit ???? i knw u guys wouldn knw exact things but speculations would be appreciated ???

btw just found this http://www.youtube.com/watch?v=VaoS4dLamOI but if this is already posted by someone ignore it and my apologies launch of the pulsar 135

And the current 13.5 bhp is unjustifiable..??


And therefore any other bike in the world doesn't deserve a 4 valve head..?? No I still don't get you.

There are 50 cc scooters in the developed world which have 4 valves (coupled with fuel injection as well) for its tiny cylinder.

You can also try comparing the power to weight ratio of this bike with other 150 cc bikes in India (forget the 125-135 cc bikes).



There is NO CB"F"Take a test ride when ever you get the opportunity.. it will clear things better than browsing through literature about 2 valve and 4 valve per cylinder designs.



Other Pulsar's or TVS RTR bikes are rev friendly all right but only in a very limited RPM range.. take them above 7000 rpm and the engine will scream its lungs out and show signs of strain.. A 4 Valve design on the other hand is more relaxed at highs revs.. the R15 is a good example of that.

@Noel: Just to cut a long story short,
How much "performance gain" do you expect when you see a 4V engine on a
- 50cc mill
- 100cc mill
- 135cc mill
- 150cc mill
- 180cc mill
- 200cc mill
- 250cc mill

I am sure you see an ascending order in your expectation, but does that mean that a 4V engine on lower capacity engines are a 'gimmick' ?
From where I see it, its an 'improvement' in what you are referring to as 'engine design'
Hope you got my point!
Cheers!~

4 valves will do its job

Guys, here is a review of P135 Ls on this blog : Pulsar 135LS | Bajaj Pulsar 135LS | Pulsar 135LS | 135LS | Indian Autos blog. Also can we believe in the information mentioned in this blog, any experience from this source.

Along with the review of P135 LS, the Transscipts are of the interview with Rajiv Bajaj who discusses on points like XCD and Krystal get axed, Bajaj Pulsar 400cc, cruisers, Motoczysz, Boxer, Bajaj, KTM and RE brands.

Also last line says " Rajiv Bajaj also added that he will show nothing new at the Auto Expo next year."

Require your comments & experience on this blog, so that unneecssary speculation do not rise.

looks like hunk?

I always felt this difference between the RTR and the R15. Didn't exactly know it was because of the 4valves head on the R15. That was a good example, mate. I can totally relate to it.

BTW, could you explain how does a DOHC differ from the SOHC, in terms of performance?

One of the advantage of a DOHC (Double Overhead Camshaft) arrangement over a SOHC (Single Overhead Camshaft) is that the DOHC setup makes it possible for the Spark Plug to be located "Centrally" on the Cylinder head, which is actually the ideal position for the Spark Plug.

All bikes manufactured in India currently have the SOHC setup and hence the Spark Plug is located sideways.


A DOHC arrangement showing the Spark Plug located at the Center




A DOHC arrangement in a multicylinder engine

payeng, Thanx for that
very informative ....Can u show us a similar animation for SOHC..??pls...
Do the both valves open at the same time ??or there are any engines which have delay between two input valves ...??
R15 and ninja have SOHC or DOHC...??
sorry for two many questions....can u give me link for good informative articles about these valves and"variable valve timing"

Sure, here is the pic of a SOHC setup on a Multi cylinder engine.




Am not really sure about that. Sorry.


The R15 has a SOHC setup and the Ninja 250R has a DOHC setup


You are welcome bro.. we are here to share information aren't we..??
About links.. try "howstuffworks.com", else Google and Wikipedia is always there.

actually i was asking for SOHC 4valve set up
still trying to figure out how wud that be!!!

This thread is actually deviating from our trend of fighting about the technology between die hard Bajaj & Honda fans. And what??? actually discussing some technical stuff. My pop-corn goes on to the attic and I'm liking it. Thanks to everyone.

Now, guys, would it be beneficial going for a DOHC setup in an engine with two spark plugs like the Bajaj's DTSi?

My take (can be very amateur, please bear with me) - the centrally located spark plug advantage cannot be used in a DOHC 4 Valve engine as there would be no place for the second plug. In that case, the DOHC setup is just an extra expense. Wot u say?

I got it!!!
inverted Y-shaped rocker arms are employed so that single cam activates both valves either intake or exhaust
imagining it is becoming difficult!!!
waiting for p135 to hit the showrooms
ps:thanks google!!

Nicely put
But I guess noel is pointing towards something different and grave than what we understood.
As has been debated, this technology, for that mater of fact, any tech is advantageous on any sort of an engine. Specially for us, we being the commuter smaller engine using crowd.
What Noel meant, and most of us also crib about, is the fact that why cant the manufacturers move up the ladder.
Honda introduced the much touted FI in ther flagship 223cc engine just a few days back. Prior to this, they were beating around the bushes doing with 125cc engines.
Similarly, Bajaj introduced 4 vavles in a smaller engine where they could have done it on a bigger 220cc engine etc etc...!

While the above examples have ther own reasoning and justifications, I would just point out to one thing (especially to noel) we are moving ahead, we are moving forward, though the pace might be slower than a snail!



OT: I still feel this is brand dilution....