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Things have changed - they have been changing for a while, but they are finally here. With Euro 5+, manufactures have to run bikes very very lean to pass testing, besides the restrictions put in - in short a base flash isn't enough anymore.

 

have a look at these graphs - 5%, 10%, 20%, 40%, 60%, 80% and 100%

these are on a bike with a Catalytic converter removed, beautiful slip on, performance air filter and the oxygen sensor removed and disabled on the ecu (but no restrictions removed) to give you an idea of stock fueling.

 

The blue lines - dotted is before and solid is after the tune. before manufacturers worked on 14.7 as an air fuel ratio as the most efficient, but it seems bikes are running much leaner now.

 

Fueling MUST be corrected on this bike before most of these restrictions are removed.

as the bike is stock, fueling is not healthy for this engine.

 

There are some things I can do on the ecu to improve the bike, but i wouldn't be happy fully derestricting the ecu, without dyno time.

 

I know that your first instinct will want to see the max power at max rpm - thats not that where the restrictions are on this bike -  it took me less than 20 minutes to tune 100% throttle and got minimal gains - with that said, i didnt do the usual tuner tricks like pushing the limiter higher for figures (actually think I measuring was a bit short of the limiter) - i dont like blowing bikes up.

 

Look through them - red is hp, green is torque and blue is air fuel ratio... the dotted line is before the full dyno tune.

 

First off - the stock fueling (dotted blue) is ridiculously lean, bordering on dangerous to the engine. But manufacturers have to do this to give us bikes like these. The solid blue line is current fueling - is aimed for 13.0 as it gets pretty warm on the track

Part of the tuning is removing restrictions in the ecu, one of the big restrictions here are the electronic throttle valves that open up a lot slower than anyone would want.

The owner does a lot of track riding and wants ALL of the power that he paid for. Arguably I could have left in some of the restrictions just before 8000 to give a smoother torque curve and stop that dip, we probably will fine tune a bit.

Have a look at the lower throttle graphs...

Don't focus on hp or torque numbers - all bikes are different, all dynos are different and even the time of day changes numbers. Look at the % gain. Im sure that with with all of this power, alot of time will be spent at low throttle.

40% Throttle is about the power of a 750 (on my dyno)

60% Throttle is the power of most 1000s (on my dyno)

80% - 100% is just ridiculous

 

A fully tune - derestricted and fueling corrected will cost R8000

Kawasaki ZX10 R 21 - 25 Derestriction

R 8 000,00Price
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