Rpm coming down slowly? Sounds like it's very rich.



Sent from my WT19i

Nice. So i guess you people would be doing the rounds this weekend. Great.


That's what i ain't sure of.
The plug shows a light color indicating lean running and symptoms are kinda of rich.

Still searching for a good tuner. The SVC guys here are wary of touching modded bikes or rather bikes with non-stock parts.

cheers...

Speed Runs: initial reports (Video and graphs following soon)

Hi All,

yesterday had a blast getting the speed runs done thanks to test rider Jr. Danny Pedrosa AKA Joel Raju. Special thanks to rider abhimanyu31 for lending me one of his well deserved weekends, Gtech Pro RR unit and his Go Pro camera. Unfortunately i have huge workload piled up so haven't got the time to start working on the video and the readings yet.

Anyways baseline is that the stock bike is quite slow by nature. Below are the initial data for the Geeks :

* Motorcycle​: Yamaha FZ 16, 2010 model
* Any engine modifications: None. Fully stock
* Engine Oil: Motul 300V, 15W 50, Double Ester Fully Synthetic oil
* Kms covered since last service: 900 kms

* Test Rider: Joel Raju
* Rider Weight + Riding Gears: 58kgs + 2 kgs

* Wet weight of the bike(Full tank+bike weight as per digital weigh bridge readings): 140 kgs

* Co-efficient Drag: 0.9 - 1.0 being a naked bike
* Transmission Losses: 22%

* Ambient Temperature at the time of the test: 39' Celcius
* Time of the test conducted: Morning 10:12 am (Now don't ask me about wind speed please!! i am not a weatherman )

* GPS Data Logger: Gtech RR Pro Fanatic. Pic of the same:




* 0-100 kmph: 18.83 seconds (I don't remember the exact nos. this is the figure on top of my head, will provide the accurate data in the next update). The first attempt gave us around 19.88 seconds. The best nos. we got was the 18.83 seconds. Not bad considering it is a 2 valved, 4 stroke air cooled engine with stock clutch plates since the bike rolled out from the factory. A stock Yamaha R15 can do around 13 seconds on the clock. I recon keeping just 3 ltrs of fuel in the tank we should be able to sleeve off a second or two towards 100 kmph.

* Power: Approx 11.2 HP at the rear wheel with around 22% transmission losses. The HP readings came out a bit higher on our tests as a result of slight depression on the road (around 226 mts if i remember the nos. correctly). I was quite happy with the fact that even after 25,000 kms+, HPs haven't had the chance to escape from this 2.5 year old heart. So the due diligent periodic maintenance of the bike is paying off its dividends. Would love to get my bike on a DYNO but as mentioned before we don't have the privilege here in Mumbai as of yet.

abhimanyu31 was kind enough to let me collect my kits from his place. I had kept his store room piled up with my stuff: New stock FZ engine head (now with Altered Port geometry done), the BB kit, camshaft, Air filter and the 29mm CV carb from UCAL... basically the whole lot!!

Just sharing some pics of the same:









Pics 1, 2, 3 & 4: Stock FZ Engine head with Altered Port Geometry done. Close up shots of the same.





Pic 5 & 6: 29mm CV Carburetor. UCAL. This carburetor is found to be doing duty on Apache RTR 180. The carb has been rejetted with 115 main jet.



Pic 7: SIMOTA stock replacement performance air filter



Pic 8: Mild lift camshaft

I checked with abhimanyu31. The build will be done by the mid of march once i am back to Mumbai from my work. So hopefully this journey will be a good one!! Next speed run will happen with the transformed beast.. post run-in and proper tune up ofcourse!!


Cheers,

Awesome shv18 :thumbup:
What's the top speed your bike achieved?
Happy to know that our bikes doesn't have 50% transmission loss.
Btw a fully tanked fz weighs just 140kg?

Good luck on your build bro and don't forget about the video




Sent from my WT19i

Nice to know the actual numbers of our stock bikes. Post the actual videos and all later. No rush.

Now you get back from work soon and start the build man.

cheers...

If you check out the service manual of our bike.. The wet weight is 135 kgs. So with leg guard side stand and main stand and may be a minute bump in weight with the accessories included my bike showed 140 kgs. We didn't do a top speed test as there was not enough stretch on our secret test track. Plus the whole agenda of the test was to replicate conditions a stock bike faces with side mirrors and everything.

Cheers,

RPM Floating is a symptom of running lean.

Yup....me too thought so and today tinkered with the carb a little bit.

Now the bike isn't stalling at every stop light but only sometimes.

A few more days and i will be fine to get back on the bike and hunt down a good tuner with
the help of some senior members.

cheers...

Very interesting test coming up, I am sure, but it seems to me that some "postulates" are wrong:
- Net weight of bike is 135kg, right. hat will include side and central stand, but no leg guards. But you report 140 with full tank, which takes some twelve liters= another ten kg.
- Also, I am surprised to read a blunt 22% transmission loss. That is a precise number. How do base this affirmation? How can you be sure it is not 15 or 25???
- Then, the road has a slope, apparently considerable: 226m....or is this the length of the stretch of road (then how the heck to you get 100kmh after 200m. on a stock bike???)
- Wind speed is not taken in account. Should, really.

Many information not too clear there (or did I miss something?). How accurate can these results be???

I shall add (but there is nothing you can do to it) that an outside air temperature is quite high. We are, you and us, in the hot season, but such high temperature will make the engine lose a lot of power, and AFAIK, would it be "only" India (vast country!), only some places have this high temperature (at 10 AM!).

The bike was weighed on a digital scale with a full tank of fuel and the figures that came up were 140 kgs. Though I was not surprised at all. I had in fact told Shv18 to expect it to be more than what is mentioned in the owner's manual. What I can deduce is that it seems that as a practice what Yamaha mentions wet weight is in fact a bike with only half fuel load.

We have not been able to find any written documentation on transmission losses for FZ16. Precise figure for transmission losses would require a dyno test in which power measurements can be taken from the crank and at the wheel and the difference between both would give clear map of the transmission losses. However, such a dyno test is not possible as there is no bike dyno available to us. Therefore, our source of information had to be experienced tuners. From various sources we got figures ranging from 15% to 25%. Joel indicated that the figure can vary between 20 to 22% depending upon the state of the transmission. We decided to take the figures Joel gave us as the yardstick, thus we took the upper figure i.e. 22% as the transmission looses.

Shv18 is mistaken about the slope part (a bit too eager to belt out information without checking the facts , can't hold his horses ). There is a slight depression in middle stretch of the road. Its not 226 meters and that is certainly not the length of the run. The road was more than 600 meters long and is not completely on a slope.

Yes, wind speed is very important factor and wind direction is even more so. However, we were not in any position to measure wind speed.

We will try to repeat the conditions as much as possible for the next run. It will definitely be at the same venue, on the same stretch of tarmac and at the same time of the day.

We will extract the information from the runs and post it as soon as possible.

Yes sir indeed over excitement though the true information with other data shall be mentioned later when we work on the video eh?

@Luke: Perhaps i was not able to put down my thoughts properly as i wanted to leave the blabbering in the upcoming detailed report with the video and the graphs. Anyways yes i totally agree with you; for a carbureted air cooled engine the ambient temperature makes a huge difference to the engine performance. Mumbai unfortunately at this point of time will have the temperature needle hover around 32-41' Celcius during day time, nothing i can do about it.

We don't have the necessary means to calculate the average wind speed, wind speed at starting point, mid point and the exit point where the bike managed to hit 100 kmph. Although such factors are important to give out a completely true factual data however.. we are expecting too much from an over excited little boy aren't we??

Like abhimanyu31 has mentioned, we will try and replicate the conditions with the souped up ride. I am expecting the nos. to come down more as my ride will most likely have a new clutch plate assembly installed which should be able to transmit more power to the rear tire efficiently.

But lets keep that for the later part shall we?

Cheers,

Well: the starter dish was quite tasty and promising, but rather short and now leaves all of us that bit more hungry and eagerly waiting for the main dish.
WAITER, please!

Weight given on Owners and Workshop manual is effectively wet and not dry weight. I had in mind it was only dry weight. My bad, sorry!
Then, is it half or full tank...??? SHV18 mentions a leg guard: I do not thing this would amount for 5 kg, but two or three, sure! So that leaves just two or three kg "uncertainty". Lets call it the odds! Should not be very significant on a comparison since the other bike will have the same fuel in, won't it? I am sorry I cannot repeat your experiment here, then (although I would also have to find another rider too : I am well over 58 kgs.!!!) as it would have been really interesting (at least for me) to compare the 180cc. setup with the 205cc. one!

About wind speed: this may help (although I doubt that you will be riding in force 8 or 9 Beaufort!!!)

Stock FZ Speed Run Graphs

Hi All,

I finally managed to squeeze some time out to post the graphs of the speed runs done last time. As mentioned earlier the nos. in the previous post were just figures i could recollect on top of my head. Unfortunately i won't be able to give out the graphical video output as the Gtech os version on the device doesnot support CSV file output which is required by the video rendering software to give out the data embedded on the video.

There are graphs of two speed runs which were attempted during the speed run. I have merged both to give one a better idea

Here are the actual details in graphs in the following order:

UPDATE: Readings in Kmph instead of earlier mph.



Pic 1. Speed Graph



Pic 2. G's Experienced by rider Joel Raju



Pic 3. Distance Covered



Pic 4. HP Readings



Pic 5. Braking done at the end of the speed run. Though we never kept this as a criteria at the first place. Regardless got an extra graph so sharing with you all.


Cheers,

So 0-100 in 11.45 seconds?

Edit: looks like 18. Something but why the box under the graph shows 11.45 seconds ?


Sent from my WT19i

The box below is not the correct figure.. it basically points out the figures if i point the mouse cursor let's say at any point of the tip of the graph, it will give you a reading of the same. In this case it was not put on the graph to get a clean image.

Cheers,