Yamaha r6 2003 problem

I have a big problem with my bike last season my bike was starting running on 3 cylinder first i thought it was my spark plug's my bike had ngk iridium with only 4000 km,i search on web what are the common problems with r6 2003 and i found the coils problem i check the coils they are all mitsubishi i checked them and they seems fine i replace the spark plugs with normal ngk and my bike is running in in 4 once again but i have a great loose of power in low rpms and high rpms i can't evem past 230 km/h can't pass 13.000 rpm very hard.On one coils i found primary coil resistance 0.17 in manual is .23-.32 and other problem my bike was starting back fire when i rev at any rpm even when i'm changing gear.
I have a mivv gp,K&N air filter,new clutch.

There was a recall on those coils...a quick google search brought up a few posts saying they are no longer covered for free though...May want to call a local dealer and give them your vin...see if can get some free coils.

2003 Coil Technical Service Bulletin

But i read there is a problem with denso coils i have mitsubishi coils and don't know if there is a recal on mitsu coils

theres no recall with yours. how many miles do you have? i had to replace mine on my 06 after around 18k of HARD riding

i use normal plugs but i also change them every 6-7k miles because of how hard i ride. if 1 of the coils is out of spec then theyre arent fine. id change them

Another problem when i checked them at cold the primary resistance is around .10 and secondary resistance is ok i checked another set of coils at cold and they are the same i must checked them at warm how much do i run the bike before i checked them?

you dont need to check them when theyre warm. you have bad coils, just replace them

When i checked them on warm they are fine on cold they are out spec.... i checked 4 mitsu and 4 denso on cold primary is around 0.11-.10 on all of them on warm they are fine just one mitsu is out of spec 0.17