[Simon Audi]

Hi,

OK - as promised - I got my daughters bike Dyno'd

The bike has around 800mile on it and around 60 miles on the Light Bore Kit

The bike has the following mods

1. Yoshimura RS9 Full Exhaust
2. K&N R1100 Pod filter with air sensor mounted in the end.
3. Yuminashi Light Bore Cylinder and Piston - 150cc
4. Yuminashi Standard Head Race CAM
5. Yuminashi Valve Springs
6. Yuminashi Light Bore Injector
7. Yuminashi Light Bore Controller.
8. Std Gearing
9. Larger Mitchelin Pilot Rear Tyre (140) which has an increased rolling diameter of around 2%.

I have been running the bike for a while with just the Light Bore Kit, Light Bore Injector, Exhaust and Filter. On the weekend I fitted the CAM and Controller.

I am running the standard Throttle Body - with the bigger Injecter.

When I first connected up the Controller I could not get it to run well - rough ticking over etc - hesitant.

So I then fitted the Standard Injector - that was worse - but I forgot to reset the ECU

So I reverted to the Light Bore Injector as a starting point for today.

I went to a Company REPS - near me (25 miles) - weather is awful - so loaded it in the Shogun (Montero for you USA guys)

Here it is with Roy on the Dyno

On the right is the AFR gauge - so you can real time see whats going on.

Then he set it all in motion

Run 1 - Light Bore Injector - No controller

AFR ratio was everywhere - bike made 12.59HP at around 8000 RPM

Run 2 - Connected the Controller

AFR still everywere - too rich and too weak - depending on where we were - Bike Made 12.32 HP at around 8000 RPM again

So I then swapped the Injector to the Standard one

We then did more runs - with the controller maxed out on all settings - we were unable to get the AFR correct - running too weak (different to Snake - no idea why)

No matter the setting it just ran weak. (reset ECU inbetween)

So then refitted the Light Bore Injector

Roy then did around 20 or so runs adjusting the controller - no matter what the setting - he was not able to get an AFR that was good everywhere.

The best results saw 13.07HP at around 8500 RPM

If you look to the graph - different runs - different conditions you see on the bottom Graph - AFR results about 12.7 is the red line - below it is rich above it is weak - acceptable would be 11.5 to 13.5.

Blue Line - No Controller
Red Line - Final Positions on Controller
Green - Intermediate run - more Torque - Less HP

Finally we did a through gear run.

Now some comments from Roy interpreting test.

1. Controller is not that good / adjustable - but results are OK - and ratios are OK - not the best.

2. CAM is tuned for high RPM

3. AFR around the 2000 to 4000 RPM can not be corrected with controller

4. Standard Injector - did not give enough fuel for kit - even with controller (although Snakes did) - so maybe controllers dont behave same??

5. Its still pretty good power from a 2V 125

6. The bike is geared too tall for the power - he advised reducing 1 or 2 teeth on front - this being evident from the last graph - where you can see it can not make peak power in 4th due to gearing.


Roy at REPS motorycles was great - and we spent aroun 1.5 hours playing - cost was £80 - $120 ish

Final Settings on Controller

 

[Strokd_GE]

The problem is you're using a dyno, yuminashi tunes theirs on the street for best performance

I like that the cam pulls solid to 8k, I'm still not sold on this brand though.. It's sad the consumer is spending their money to find out parts like the controller are junk

 

[daddysmut]

those numbers are very disappointing

 

[dannydee]

im not sold on this kit but 13bhp isn't to shabby , just wondering could they not put a dynojet tuning program together ?

 

[Remould]

I'd like to see a stock bike on that dyno to see the figures in comparison.
Where about in the UK are you?

It would be interested to see the results of the Kitaco tuning module. Not sure if it's out yet though...

Sent from my HTC One

 

[Snakeibf]

Great info, can't wait to get the bazzaz controller to see if we can have a way to properly adjust the AF ratio. I did get my bike running well with the 31mm TB and It did feel to have more power all around. The only exception is the at low RPM and idle it's still way to rich.

 

[Simon Audi]

Great info, can't wait to get the bazzaz controller to see if we can have a way to properly adjust the AF ratio. I did get my bike running well with the 31mm TB and It did feel to have more power all around. The only exception is the at low RPM and idle it's still way to rich.

Yes it's strange yours is running rich - mine runs weak and I have the larger injector - and theoretically smaller TB

13 bhp is a 30% uplift on the published BHP and this is at the rear wheel - factory figures are normally at the crank - so the gain could be as much as 40% on stock - look at Bazzaz Dyno that's low 8.5 BHP but a good AFR - stock cylinder!

We would all like more - but I have already spent nearly £1000 for engine and exhaust mods $1500 which is just over a third of the bike cost - I was looking for 15BHP - but will settle at this - at least for now - I do not see a PC getting any more power - nor the Bazzaz - basically 12.5 to 13.5 is all these are going to get without a bigger bore and new head - correcting the AFR ratio did not give too much power difference from where I started - but will obviously make it smoother and more economical

i am Newport S Wales - the Dyno is in Caldicot just Wales side of Severn Bridge

The kit has been easy enough to fit - i think for everyone else - now the testing has been done - there should not be major issues

Would have been better if all this info was available before we all started - but hey ho!

 

[Snakeibf]

I believe the larger Throttle body will allow for increase intake velocity and will offer gains with the stock head. I just wish I had a dyno in the area to prove it with.

 

[ShapeShifter]

Thanks for posting this Simon!