My Second Yamaha -YBZ this time

[optimist_lad]

You're doing it all wrong... You cannot simply multiply RPMs with gear ratios and divide it by 1000 (not even dividing it by 60 minutes to get per hour) and get km/h and max speed of that gear.
If you have a bike, of say max RPM 8000, and a first gear ratio of "x" and you want to find out the maximum possible speed in that gear, you will have to multiply RPMs with 60 (to get revolutions per hour), divided by final ratio (gear ratio x sprocket ratio) and multiply that result with circumference of the tyre (2pie x radius of tyre (along with rim, i.e total radius from top to centre of the rim) - in inches) this will give you a result in inches/hour, divide that again with 5280 (feet in a mile) x 12 (inches in a feet) to get miles/hour which can be easily converted to km/h, and that will be your max speed in that gear provided that you have enough engine torque and enough horsepower to deliver that torque. How fast you get to that max speed of given gear is dictated by your torque and Horsepower, hence acceleration will be directly proportional to how fast that torque is being delivered ( i.e HP).

[gull_s_777]

Gears:5First gear ratio:2.6429Second gear ratio:1.7778Third gear ratio:1.3158Fourth gear ratio:1.0455Fifth gear ratio:0.875

Serious Error with meter

Engine max Rpms are 12000

I have seen this bike video In video bike is not going above 10,000 Rpms

Now doing math

Fifth gear ratio:0.875 is

0.875x10000=8750

87.50km/h is maximum speed of this bike according to math

This math seems all wrong.
Try to calculate bike's speed in first gear using this method.

[hamikhan]

Gears:5First gear ratio:2.6429Second gear ratio:1.7778Third gear ratio:1.3158Fourth gear ratio:1.0455Fifth gear ratio:0.875

Serious Error with meter

Engine max Rpms are 12000

I have seen this bike video In video bike is not going above 10,000 Rpms

Now doing math

Fifth gear ratio:0.875 is

0.875x10000=8750

87.50km/h is maximum speed of this bike according to math

This math seems all wrong.
Try to calculate bike's speed in first gear using this method.

Respected Gull sahib i already asked in my post speedo meter tells some other story means

Meter is showing wrong speed

I have done math according to yamaha givens gear ratios

Fifth gear ratio max speed is 87.50

How it can be possible bike meter is on 125km/h

I am not enemy of yamaha company not in favor of any other company

I am here for a healthy discussion

These were questions & answers which comes in my mind & i shared them here

Only yamaha owners can confirm these things

ALLAH kray bike ka meter jo show ker raha hay wo 100% vesa he ho

Chill out guys

[hamikhan]

And just one more thing, all I need is the performance between the speed of 70/80 to approx 100/105.
When YBZ wan't available, I tried YBR, everything about YBR is good except performance and that issue seems fixed with YBZ so I went for that.
To me, other factors count apart from speed so i still think, YBZ is better but it's just my opinion.
I'm not sure if you agree with me but i really encourage you to take a test ride and just.
May be your opinion about this bike changes.
Peace.

Mahr sahib personally i like this YBZ bike+its performance & thinking to purchase but want to confirm it from you guys

Chill out

[optimist_lad]

Buddy why don't you understand? You're doing the maths all wrong. Your calculations make no sense. I've already explained how to calculate max speed of a gear based on RPMs, but you need to know sprocket ratio and tyre radius as well, not just gear ratio.
Take a look at this video by Engineering Explained, to learn how to calculate max gear speed.
This is for cars, but the same analogy applies to bikes as well.

And for the record, I am also here for healthy discussion, but if somebody is doing something wrong that can mislead people, then It's okay to correct them. Peace.

[mahrumer]

I just learnt something new today by this video. Thanks for sharing.
There is too much engineering goes into the engine. I just hope that YBZ's aluminium cylinder helps keep the engine running for a longer period of times.

[mahrumer]

Glad to hear that.
I like this bike too.
I haven't got the chance to ride the bike on the weekend and today but let's see, may be tomorrow but once I'm done with the running of this bike, I've plans to post review + comparison with GS150 & YBR.

[optimist_lad]

I just learnt something new today by this video. Thanks for sharing.

My pleasure, by the way I am going to buy a new YBR 125 after EID, but I am a bit concerned about performance. It's low on horsepower & torque. It's tough to choose between CG 125 and YBR 125. I don't want to buy YBZ because it looks too boring. CG 125 has torque and power but everything else is outdated about that bike.

[salmanbucha]

Bohat piyari bike ha ybr .zaroor lain .i have been enjoying its ride for the past 6 months .

[optimist_lad]

InshaaAllah EID k bad black color me khareedunga, hopefully all should go well.

[salmanbucha]

Inshallah bro

[hidalgo]

I am glad of being of service to you .
My videos always had a reflection of what a motorcycle is capable of. you have checked it yourself now yet people will tell you it was inclined and bike was being pushed by a train.
Still i don t want to sound rude to others. Their is a lot more to a motorcycle than just speed.
Regards
Haris aka Hidalgo

[mahrumer]

I am glad of being of service to you .My videos always had a reflection of what a motorcycle is capable of. you have checked it yourself now yet people will tell you it was inclined and bike was being pushed by a train. Still i don t want to sound rude to others. Their is a lot more to a motorcycle than just speed.RegardsHaris aka Hidalgo

I absolutely agree. I was in doubt before buying this bike but now after owning it, I firmly believe that this bike pretty capable of what you just showed to the world.

I now like the bike even more than previous GS150 since, like you've mentioned, there is a lot more to a motorcycle than speed.

BTW, your videos are awesome and you're work is superb. Thumbs up to you.

[naveed4speed]

first of all congratulations .
bike run in period is as following for Yamaha bikes.
make run in period as per owners manual which is first 500 kms ride every gear till 6000 RPM.
and after 500-1000 ride till 7500 RPM.
but its a personal experience that one must at least take his ride to full rpm once in a 100 km.
now comes lubrication.
change your first oil on at least fist 300 km.
and 2nd on 800-1000 km.
if you want to use Yamalube than dont use it for max 800-1000 kms.
suggested oils are for new bike.
Yamalube 20w50. (drive for max 800-1000kms)
zic 10w40 4T only.(drive for max 1000-1200kms)
Liqui moly 10w40 4T.(drive for max 1500-2500kms)
Zic 20w50.(drive for max 1000-1200 kms)
Liqui moly 20w50.(drive for max 1500-2000kms)
if you guys will use 10w40 it will save your fuel economy and give you much more better performance but will make your engine a little noisy and rough.
if you guys use 20w50 than it will increase the fuel consumption as well as lack in acceleration.
for shorter drives and within city 10w40 works best.
for long drive and highway routes use 20w50.
all facts are shared on my study and personal experience.
i hope all the data shared can help you.

[optimist_lad]

Synthetic all the way! It's expensive but worth it.

[awaiz43]

thanks for sharing info its helped me in lubricant choice.

[awaiz43]

liquimoli 20-50 use kea hy maine 1 dfa YBZ mai but yeh oil bilkul b suit nahi krta is bike ko. Yamaha lube b 20w-50 hy but liquimoli 20w-50 zyada think lgta hy jaha tk meri observation hy. i want to ask agr mai 20w-50 se 10w-40 ya 20w-40 pr shift kro bike ko tu koi problem tu nahi ho ga. 1 guy at liquimoli store told me k aap 1 dfa agr 20w-50 use kre gy tu dobara less thicker oil use na krna whats the reason behind that. company ki recommended grade 20w-50 hy.
but 20w-50 pe bike ki petrol avrg or top speed effect hoti hy. now what to do company is recommending a high grade oil and bike is more comfortable with less think oil

[waheed_khaatak]

AoA
Bhai kindly yb 125z ki modification ka koi idea de do...
Allow rim
Disc brakes
Mud flappers
Rear tyre tubeless

[awaiz43]

alloy rim easily fit ho jy gy.
Disk k leay ybr k front shock lgane pre gy. jo shocks YBZ k sath jo shocks hyn unpe disk fit krne k leay jugar krna prta hy which is not safe at all.
Tube less tyres ajkal local b mil rha hy easily mil jy ga.
Mudflap ka best hal yeh k aap Yamaha junoon ka front mudguard lga lyn us k sath flap b milta hy. or front mudguard junoon ka beghair ksi alteration k fit ho jata hy YBZ pe.

[saboor73]

Just because of better seat for touring you are going to do so many things :o if you just wamt better padding under seat any seat maker can do it for you and for the low end torque and try side gapping spark plug and see if it helps