Announcement

**siddharthsure** · 01-23-2013, 06:31 PM

Originally posted by R-series View Post

when your reffering to "time" taken to reach a speed, that is acceleration. What we are referring to is engine rpm to vehicle speed. irrespective of whatever load, friction or restriction the vehicle encounters...engine rpm will be same at for eg. 100kmph for a particular gear.

consider this..1 rider 70kg - 6th gear - 100kmph shows engine =6000rpm
2 riders 140kg - 6th gear - at 100kmph shows engine speed = 6000rpm and not 5000 or 7000.

when I had the R15, it never crossed 130kmph with pillion, but the engine rpm will be the same when a solo rider hits 130kmph in the same gear.

How's tat man?? Tats impossible.......You are breaking the laws of physics.. Where is the extra work needed by the engine to pull that extra weight go??

f thats the case then any vehicle can pull any loads with ease... I can literally feel the loss in power when i drive with pillion,The way it pulls when i drive solo is totally different. Maybe the fact that the time it takes to reach that speed is correct. Will check it out next time

**R-series** · 01-23-2013, 06:32 PM

^^ that is lot of science in one post

but I hope it makes the fact easy to understand

**Ron Syl** · 01-23-2013, 06:33 PM

Originally posted by leodj29 View Post

That's totally right mate, the time it will take for the bike to reach xx speed will increase with the additional weight, but... @R-series and I are not talking about acceleration, we're talking about the speed/RPM ratio, which doesn't vary regardless of weight and/or inclination.

The only variables that affect that ratio are the sprocketing, tire size and worn out clutch plates.

Cheers and I'm aiming for this baby, even though the P200NS has been launched here at a pretty good price (the same of P220) I still think I'll grab the R15. Then maybe if the P350 is FI and proves to be worthy, I might get that one but let's wait and see.

Originally posted by R-series View Post

when your reffering to "time" taken to reach a speed, that is acceleration. What we are referring to is engine rpm to vehicle speed. irrespective of whatever load, friction or restriction the vehicle encounters...engine rpm will be same at for eg. 100kmph for a particular gear.

consider this..1 rider 70kg - 6th gear - 100kmph shows engine =6000rpm
2 riders 140kg - 6th gear - at 100kmph shows engine speed = 6000rpm and not 5000 or 7000.

when I had the R15, it never crossed 130kmph with pillion, but the engine rpm will be the same when a solo rider hits 130kmph in the same gear.

hmmm. will test this myself properly next time i go for ride.

**R-series** · 01-23-2013, 07:12 PM

Originally posted by siddharthsure View Post

How's tat man?? Tats impossible.......You are breaking the laws of physics.. Where is the extra work needed by the engine to pull that extra weight go??

f thats the case then any vehicle can pull any loads with ease... I can literally feel the loss in power when i drive with pillion,The way it pulls when i drive solo is totally different. Maybe the fact that the time it takes to reach that speed is correct. Will check it out next time

Dude the extra weight will effect the acceleration but not the rpm once u reach that speed. It's simple the engine needs to run at certain rpm to run at pull the bike at a perticular speed. Once that speed it attained, what extra pull are u talking about from there. Engine running rpm is prortional to vehicle speed. The only thing that makes a difference is the gear ratio and nothing else. We are not talking about acceleration or decelaration. It's strictly constant speed.

**siddharthsure** · 01-23-2013, 07:27 PM

Originally posted by R-series View Post

Dude the extra weight will effect the acceleration but not the rpm once u reach that speed. It's simple the engine needs to run at certain rpm to run at pull the bike at a perticular speed. Once that speed it attained, what extra pull are u talking about from there. Engine running rpm is prortional to vehicle speed. The only thing that makes a difference is the gear ratio and nothing else. We are not talking about acceleration or decelaration. It's strictly constant speed.

SO am i stressing the engine if i ride with pillion So as to pull that extra weight to same speed at same RPM ?? Does it affect if am in the Run-In period???

**leodj29** · 01-23-2013, 07:36 PM

Re: Yamaha YZF-R15 version 2.0

Originally posted by siddharthsure View Post

SO am i stressing the engine if i ride with pillion So as to pull that extra weight to same speed at same RPM ?? Does it affect if am in the Run-In period???

No, you're not estressing the engine, as long as you stay within the RPM range you decided not to pass during the run in /brake in period.

**R-series** · 01-23-2013, 07:39 PM

Your stressing of the engine depends upon acceleration . How fast or slow your accelerating to the specific speed. Not at what speed your running. So if you thing that since within running period the rpm needs to be below 5k and nothing else matters, then you would be wrong. The time u take to reach that rpm also effects your run-in. the basic fact is at the end the rider decides how to build the bikes character. You cannot make 2 bikes exactly the same.

**Shibadip** · 01-23-2013, 08:06 PM

Originally posted by antz.bin View Post

Wrong. It is a fixed ratio w.r.t. RPM. The easy way to change it is using different sprockets. If it changes on its own, its time you changed the clutch.

OK, so u are Saying that If one uses a lean Setting , then the Speeds done at a particular RPM, in a particular gear differs with the one which uses a Richer (or say more efficient) setting??
I say this because there is difference of speeds in my bike and that of my Friend (P200NS) at a particular RPM, in a particular gear..

Originally posted by R-series View Post

Your stressing of the engine depends upon acceleration . How fast or slow your accelerating to the specific speed. Not at what speed your running. So if you thing that since within running period the rpm needs to be below 5k and nothing else matters, then you would be wrong. The time u take to reach that rpm also effects your run-in. the basic fact is at the end the rider decides how to build the bikes character. You cannot make 2 bikes exactly the same.

I too want to knw in detail About this. While my NS was in Run-In period (was abt 500kms then), once i did a fast Acceleration (about 8K RPM) with a heavy pillion of 90+kgs. And now when my Bike's ODO shows 1500kms, it has lot of vibrations on all gears (except the 6th one) once I go above 6K in the RPM.

I might be thinking wrong, I but i have developed a notion that the vibes are the Aftereffects of that acceleration with the heavy pillion!!

**incipient** · 01-23-2013, 08:36 PM

Originally posted by siddharthsure View Post

SO am i stressing the engine if i ride with pillion So as to pull that extra weight to same speed at same RPM ?? Does it affect if am in the Run-In period???

Yes, its not a good idea to ride with a pillion during the break-in period...its only a matter of 1k km anyway.

Couple of tips for engine break-in:
- warm up the engine before you ride.
- keep varying the rpms.
- lugging the engine is bad (eg: going at 40kmph in 6th gear, keeping rpm too low, going up an incline in a high gear etc).
- no hard accelaration but at the same time no babying the engine.
- the run-in rpm values given in the manual isn't gospel but is a general guideline, occasional short bursts are good.
- use engine braking.
- gradually raise the rpm limit as you clock in the miles.

**R-series** · 01-23-2013, 11:31 PM

Originally posted by Shibadip View Post

OK, so u are Saying that If one uses a lean Setting , then the Speeds done at a particular RPM, in a particular gear differs with the one which uses a Richer (or say more efficient) setting??
I say this because there is difference of speeds in my bike and that of my Friend (P200NS) at a particular RPM, in a particular gear..

I too want to knw in detail About this. While my NS was in Run-In period (was abt 500kms then), once i did a fast Acceleration (about 8K RPM) with a heavy pillion of 90+kgs. And now when my Bike's ODO shows 1500kms, it has lot of vibrations on all gears (except the 6th one) once I go above 6K in the RPM.

I might be thinking wrong, I but i have developed a notion that the vibes are the Aftereffects of that acceleration with the heavy pillion!!

No Shibadip, one such instance should not make such a big impact, unless you rode for a several minutes in that same condition. issues that happen due to improper run-in are usually engine specific. This issue might be external unless the vibes from the engine are large enough in magnitude that chassis is not able to absorb it. So the conclusion is it may or may not be because of the run-in but you'll have to observe it while riding whether it's actually a fault from engine or the chassis' not doing it's job properly.

**Ashwiin Napster** · 01-23-2013, 11:58 PM

Originally posted by blyzee View Post

same pic only. need more

Sir,As It Is Against The Forum Rules,I'm Not Going To Post Any Helmetless Stunting Pictures ! If You Want To Check Out Some More Photos,Please Kindly Follow The Provided Link ! Thanks !

https://www.facebook.com/ash.2378

**blyzee** · 01-24-2013, 01:17 AM

Originally posted by Ašhwiin Napšter View Post

Sir,As It Is Against The Forum Rules,I'm Not Going To Post Any Helmetless Stunting Pictures ! If You Want To Check Out Some More Photos,Please Kindly Follow The Provided Link ! Thanks !

https://www.facebook.com/ash.2378

Dood... are you blind? . ? its same pic only. .... in your fb

**Ashwiin Napster** · 01-24-2013, 01:55 AM

Originally posted by blyzee View Post

Dood... are you blind? . ? its same pic only. .... in your fb

Well,Dude,Try Browsing For Some More Pics In The Profile Pictures And Cover Pictures Album ! You Just Won't Get Other Pictures If You Just Visit it ! Do It If You Want To Get Your Doubts Cleared ! Sorry If I'm Rude

See The 1st And The 3rd Profile Pics And Even Check Out The 2nd Cover Pics ! Sorry For Neglecting Helmet !

Well,How About This ? Good To Clear Your Doubts ? https://mail-attachment.googleuserco...IF2KmhveN5gkv4 That's A 360 Done By Me !!

**blyzee** · 01-24-2013, 08:58 AM

Originally posted by Ašhwiin Napšter View Post

Well,Dude,Try Browsing For Some More Pics In The Profile Pictures And Cover Pictures Album ! You Just Won't Get Other Pictures If You Just Visit it ! Do It If You Want To Get Your Doubts Cleared ! Sorry If I'm Rude

See The 1st And The 3rd Profile Pics And Even Check Out The 2nd Cover Pics ! Sorry For Neglecting Helmet !

Well,How About This ? Good To Clear Your Doubts ? https://mail-attachment.googleuserco...IF2KmhveN5gkv4 That's A 360 Done By Me !!

Sorry dood, got better things to do..

he he... NICE 361 Dude ..

he he (404 ?

)

Anyways.... hope you can still do more 360s and Burnouts ..

Be rude, that's much better

**vivekdev** · 01-24-2013, 10:10 AM

Re: Yamaha YZF-R15 version 2.0

Guys, anyone has done big bore kit? Jus wanted to know the feedback n cost. Am planning to go for it...

:sly:

Announcement

Yamaha YZF-R15 version 2.0

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment

Comment