Try using unleaded fuel instead of leaded, the bike is designed for this fuel.

Seriously, it's all down to your riding style, try launching yourself in the power band, like 6 k rpm and shift around 9-10k rpm.

--- >> Um , I used to put Super Unleaded petrol in the SHELL Petrol bunk from the Day 1 !! I never used leaded petrol !!

I agree with your point !! But in traffic sectors , rest other bikes leads me from the signal starting point , where i can't rev . my bike up to 9 - 10 k rpm !!

My point is rest other bikes i mentioned produces max power and torque would be lesser than the R15 !! For ex : Splendor produces 9 hp and torque i guess !! Am i rite ?

My Question is how does that type of bikes / moppets leads me from the signal starting point ? !!

I taught i will be the first to lead them from the signal by changing 1st and 2 nd gears @ 4 k rpm !! Isn't this possible to lead them ? [ But when i lead them @ 40 km/hr or above i will be Zipping fast , the rest other bikes couldn't catch me !! ]

Anyways , thank you for your reply !!

buddy it seems problem of your riding style. i change gears at around 4 to 5k rpm in traffic and at 9.5k when in rush. but never faced very sluggish acceleration. how much throttle opening do you give? as there is very little power bellow 5k rpm try to give some more throttle and if you r with pillion shift gears around 5 to 6k rpm

and now above your heating problem, check the coolant level

Hello Tanmay !! Regarding heating problem , i just checked the coolant level an hour back !! " The coolant box is empty "

I agree with you !! I open the throttle very less only !! -----> Have you seen the Mark present in the throttle grip ? If i open the throttle , till the grip coincides with Ignition " ON " switch Symbol , the Bike acceleration is very nice !! [ Tried a hour ago in singles as well as doubles ]

Thank you very much for your reply !! Your Suggestion helped me to solve one of my issue !!

+ 1

Hi guys, how much does a used R15(nearly 1-1.5 yrs old with 10k-15k) R15 cost?

Hi guys, how much does a used R15(nearly 1-1.5 yrs old with 10k-15k) R15 cost?

Try using unleaded fuel instead of leaded, the bike is designed for this fuel.

Seriously, it's all down to your riding style, try launching yourself in the power band, like 6 k rpm and shift around 9-10k rpm.

--- >> Um , I used to put Super Unleaded petrol in the SHELL Petrol bunk from the Day 1 !! I never used leaded petrol !!

I agree with your point !! But in traffic sectors , rest other bikes leads me from the signal starting point , where i can't rev . my bike up to 9 - 10 k rpm !!

My point is rest other bikes i mentioned produces max power and torque would be lesser than the R15 !! For ex : Splendor produces 9 hp and torque i guess !! Am i rite ?

My Question is how does that type of bikes / moppets leads me from the signal starting point ? !!

I taught i will be the first to lead them from the signal by changing 1st and 2 nd gears @ 4 k rpm !! Isn't this possible to lead them ? [ But when i lead them @ 40 km/hr or above i will be Zipping fast , the rest other bikes couldn't catch me !! ]

Anyways , thank you for your reply !!

Guys , don't laugh at me , As i don't have well wishers for my bike !! I hope R15 owners will help me !! [ I'm totally upset now because , till jan 27 th din't face a minor issue !! But yesterday I'm facing so many issues !! ]

My Bike ODO have done 11 k km & above !!

My Bike Speed "O" Meter got stuck @ 115 km/hr speed in doubles !! The speed was not increasing even i reduced the throttle and increased it again !!

Rider + Pillion weighted around - 145 kg's !!

And , My Engine heated rapidly with in 1.5 km travel !! Is this common for all other R15 ? ?

My self and other unknown persons owning different bikes were standing on the first line before the stop line !! [ Other bikes / Gear less scooters were - Splendor , Activa , Scooty pep , TVS - 50 and fazer !!

All these bikes went first Including TVS - 50 !! and i overtook them at the speed of 40 km/hr above only !! [ No one could catch me after i leaded them ]

I used to change the first gear at 4 k RPM and 2 nd , 3rd & 4th @ 5.5 k rpm and 5 th & 6 th gear @ 6 - 6.5 k rpm on city rides !!

My Question is - Why i was behind all of these bikes ? And i leaded them @ 40 km/hr above !! Whats the Problem ?? My Bike Pick up have reduced or Any problem with my Bike ECU or my riding style ?

Note - those bike started Rev . after seeing my bike next to them !!

My R15 v 1.0 delivers me around 40 - 42 km/liter when it is driven @ 60 km/hr or below and 38 - 39.5 km/liter when it is driven above 60 km/hr - 75 km/hr and 35 km/liter is constant if it is maintained above 75 km/hr on City !! But , if i keep rev. the bike means i'm getting a mileage of 30 km/liter only !! [ This is on City Rides ]

90-120 KMPH---------------> 45-47 KMPL --> On Highways !! I used to do Minimum 90 km/hr and maximum speed i have done is 120 km/hr with my mom as the pillion [ I always used to travel with my mom ] , and I'm getting Minimum 45 km/liter , and frequently i'm getting a Maximum mileage of 47 km/liter !! [ Hope it makes you to understand ]

This is my Mileage calculation with full tank petrol till reserve !!
I repeated this experiment refilling petrol to full tank for " 4-5 " times !!

Note - " The real fact is My Bike Mileage varies as My Speeds varies , and i don't know why !! "

Please Help me - Is this mileage figures are correct ? Why I'm asking because , when i shared this to one of my friend he started laughing out loud !! I asked him why are you laughing , he replied your bike have got Fuel Injection and how can your " Mileage differs according to your speeds " [ How about you guys ? Does your bike mileage remains constant --> even you rev. up to 8.5 k rpm limit or above < --- or it varies according to your speed ? !! This started made me to worry from yesterday !!

1.Is there any problem with my bike's fuel injection system ?
2. Any problem with my bike's ECU ?
3. Or is this common for all R15 ?

Please Rectify my problem !!

hi.. Has anyone bought coolant separately?
Yamaha guys say, they use Motul and they don't sell it. Motul coolant is nto available anywhere.
I know, we cn simply walk to a good car shop and ask for a box of coolant.. but I am not sure about specifications and brand.

can someone tell me a good coolant(with his experience) to buy, with brand, specification (if any) and price.


Thanks in advance.

anyone.. someone..

I hope you know that torque and power are not the same.
2ndly dont "taught". Just ride! Use your senses.
Further there is no way any of those bikes mentioned could do what you said. So like the old saying " its not the ride that matters, its the rider".

OK .. Fine !!


Why would you expect the speed to increase,when you had reduced the throttle? Even if you increased it afterwards. All that did was go lower down on the power band confuse the ecu, leading to time and energy waste. 115kmph was terminal velocity under those conditions.

OK .....


Your calculation method is not precise. Reserve is only a digital display indicaton, and as you may have noticed sometimes the fuel bars are fluctuating for brief instances. A better way is to full tank; ride around; go back full tank; note the difference. At the top there is a closed poll, where people voted on their averages. There are an extraordinary few, chosen ones, who seem to get 50+. Deflated tyres return a deflated avg. So keep them well inflated.

My calculation may not be 100 % accurate , but what i had done is correct , in my point of view !! Fill the petrol to full tank and had a ride on the highways til it Reserver F indication displays !! [ Did this experiment for 4 - 5 times ]

Anyways , OK .....

And dont ride at 120kmph with your mother as pillion.
Dude if your still in school, i hope you have a valid license. If not your parents will be held liable. .

I'm doing B.E 1 st Year !! I have valid licence for both two wheeler and four wheeler !!

JayHaywalker said -- >> And don't ride at 120kmph with your mother as pillion

I Usually maintain 105 km/hr on Highways !!I usually get the chance to Clock 120 km/hr in betwwen Villupuram - Trichy Highway !!

Anyways , I agree !! And i here after i will not exceed 90 + km/hr !!

Thank you very much for solving my Queries , with patience !!



" Peace "


Answers in Bold !!

hi.. Has anyone bought coolant separately?
Yamaha guys say, they use Motul and they don't sell it. Motul coolant is nto available anywhere.
I know, we cn simply walk to a good car shop and ask for a box of coolant.. but I am not sure about specifications and brand.

can someone tell me a good coolant(with his experience) to buy, with brand, specification (if any) and price.


Thanks in advance.