lost the kick...after service

[shawnme]

bros,

i've serviced my gen1 4g92 mivec few days ago...

1. engine oil - castrol magnatec 10/40w
2. denso iridium IK22
3. engine oil filter

that's all i've done

and i've notice a significant lost of power...

and the weirdest part is : "SOMETIMES"..alot of power drop after awhile of driving(around 30 km estimate)...

i've been trying to figure out what's the problem...even after numerous searches...

firstly i assumed too much of engine oil used...so i checked the dipstick...indeed...it's a little- just a little - around 2mm above the 2nd indent...but there's still a little left from the 4L...so i suppose it's still ok..

could it be the plugs??...or just coincidence that something else spoiled right after service....i really dont know...

fuel consumption is still ok from what i see now...just lost of power...AF ratio seems normal...same style of driving...roughly same percentage of throttle..etc..

thanks ahead,
shawn

 

[SkYwAlKeR]

sparkplug problem??.... or otherwise??.... remove ur plugs and see how is the condition.... here is some guide...

http://www.motocross.com/motoprof/moto/mcycle/plug2/plug2.htm

 

[shawnme]

bro SkYwAlKeR,

the difference by assumption by my feelings is obvious....it's where i couldnt even climb at 60km/h flooring at 5th gear...(which i usually do while cruising around with 15% throttle)....well, maybe you would say it's still too high...but i still got nothing with 4th gear..same flooring...with 3rd gear..i got a little....all on a sort of levelled surface....it feels worse than a 1.3GLi carb which i use to drive...

so i went to my cheapest option...remove the plugs...and replace it with the previous plug (BKR7EIX-11)...very old plugs i assume....came with my halfcut clocked at 96K...tried it a few days...it's still ok...till now...

so i guess it's the plugs...my new question is...what's wrong with 'Denso Iridium Power 0.4mm IK22' ???
anyone using that for their mivecs 4g92??

thanks,
shawn

 

[rollakid]

bkr7 is heat rating 7 from ngk right? suppose to be same as IK20. could it be that IK22 is too cold? but rarely one step colder can do such big difference ler..

 

[shawnme]

bro,

if i've not mistaken, according to my supplier NGK #7 is equal to IK 22

i'm not so sure myself, but after reading your posts...it's true according to denso website...

http://www.globaldenso.com/PLUG/power/spec.html