spark plug question

[nightshaddow]

i fitted a new engine to a bike similar to mine (the skyjet)which has gone from 124cc to 196 cc with all the specified paper work came an advisory notice to change the plug heat range, though it did not specify what to, both mine and his bike have a white thin looking spark rather than a nice blue strong spark,

several people have suggested changing heat range but no one remembers how it works it currently has a nkg equivalent of the original Chinese plug which is a br 8 ea it has been suggested i go to a br 10 but do i look for the EA as i belive this is the thread listing and depth and is this a hoter or colder version of the plug

also in anyone opinion would this make any difference (especially on the 196cc engine) with a cleaner spark should make better combustion if i am correct

any help greatly recived
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"WHAT DO YOU MEAN 100 MPH THATS IMPOSSIBLE Its chinese OFFICER."
Current rides CB 125 TDE(the next project) NS125RK ( now on the road ) CB125TDC (soon to be project 17) melody ( the nephews )

[Blue_SV650S]

The larger the number the cooler the plug or if you like the hotter the engine can run without it causing problems.

So if you have hotted up your engine, you probably want a cooler plug.

If it as fitted with a NGK 8 to start with, then pop in a 9. I doubt you need to go as far as 2 grades different.
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The purpose of life is to fight maturity.

[nightshaddow]

yeah both engines run hot very hot in fact i think this could be the cause of a few minor problems i have, as these are air cooled machines i may go to the 9 first if then required i will try the 10

do i take it i will just ask for a BR 9 EA instead or will i need a completely different part number and if i do where can i get a reference chart
____________________
"WHAT DO YOU MEAN 100 MPH THATS IMPOSSIBLE Its chinese OFFICER."
Current rides CB 125 TDE(the next project) NS125RK ( now on the road ) CB125TDC (soon to be project 17) melody ( the nephews )

[Blue_SV650S]

[nightshaddow]

cheers for your help i let you know how they both go
____________________
"WHAT DO YOU MEAN 100 MPH THATS IMPOSSIBLE Its chinese OFFICER."
Current rides CB 125 TDE(the next project) NS125RK ( now on the road ) CB125TDC (soon to be project 17) melody ( the nephews )

[stirlinggaz]

hi,
i'd be very interested in reading how you got on,having worked on numerous chinese bikes/engines before, with varying degrees of success.
was it a simple swap over of complete units?
or just top ends?
are you gonna use an open ar filter?
what carb are you using? main jet?
have you changed/modified the exhaust?
although the increase in capacity will only give a slight inrease in top speed, it will certainly give a lot more "useable" power & wont have to use the gearbox as much.
good luck.
cheers,
GAZ