effects of using wrong plugs

[chrisdoc0608]

so i just realized i have been running br8hs plugs with my ada domes... im suppose to be using br8es. Ive now got es plugs but i was just curious if there was a possible problem that could arise from using the shorter plug or if anything will change now that i have the correct plug.

 

[tor*p*do]

just a little extra carbon
in the domes
that is now gone
since you switched to the extended plugs

 

[GDFL]

It'll probably run a little better. You lowered compression ever so slightly and moved the spark further away, but you didn't hurt anything.

 

[chrisdoc0608]

would it be the reason i have had little chunks of carbon on the piston tops?

 

[tor*p*do]

you want some carbon on the piston top
for optimal piston wash:

 

[chrisdoc0608]

you want some carbon on the piston top
for optimal piston wash:

im talking about small chunks, not a piston wash.... its prob just my cheap oil

 

[orangefinger]

Can you run br9es or is there a difference ??

 

[tor*p*do]

carbon may have built up in the exposed threads
and then broken loose and fell on the piston top
when you screwed in the extrended plugs:question:

 

[chrisdoc0608]

yea but thats a colder plug, i have always run br8

 

[chrisdoc0608]

carbon may have built up in the exposed threads
and then broken loose and fell on the piston top
when you screwed in the extrended plugs:question:

possible, but i have yet to put the es plugs in, i just got them tonight.

 

[orangefinger]

so br8es are recommended for ada head applications ?

what is the difference of 9 and 8 being cold and hotter ..??

 

[BruceSki]

better than having long shank plugs in a short shank head.

gap the new ones, put em in, and run em.

might run a bit better.


the lower the number the hotter the plug

 

[DAG]

as long as you did not use the es when the hs were called for :bigeyes:

 

[chrisdoc0608]

so br8es are recommended for ada head applications ?

what is the difference of 9 and 8 being cold and hotter ..??

an es plug is recommended for ada heads.... dunno abt the heat range recommendation, like i said i have always ran an 8 on my modified motors.

the 9 is colder, meaning it disperses heat quicker than the 8 or any lower number

 

[chrisdoc0608]

as long as you did not use the es when the hs were called for :bigeyes:

no kidding, BAD news for sure

 

[LBE]

In Yamaha 650/701/760 motors (and all Yamaha motors I presume) you can run a longer es plug, in an hs aplication. My not run great, but the piston will not hit the plug. This is in stock form. Dunno, but I think Yamaha was trying to idiot proff the motor.

For the question at hand, will not affect much.

 

[3wheelerdude]

My SN had ES in it when I bought it and the top of one piston has got two mark on top that look alot like spark plug probe.
I cant garanty this is was caused it but it sure looks like it. Maybe this way the gap is self adjustable!!! LOL\

Did not do any serious damage, I just swap to HS and voila!

 

[BruceSki]

In Yamaha 650/701/760 motors (and all Yamaha motors I presume) you can run a longer es plug, in an hs aplication. My not run great, but the piston will not hit the plug. This is in stock form. Dunno, but I think Yamaha was trying to idiot proff the motor.

For the question at hand, will not affect much.

yeah when i got my blaster it had one hs plug and one es plug.

i figured i was screwed but it didnt do any damage.

 

[oxnard111]

In Yamaha 650/701/760 motors (and all Yamaha motors I presume) you can run a longer es plug, in an hs aplication. My not run great, but the piston will not hit the plug. This is in stock form. Dunno, but I think Yamaha was trying to idiot proff the motor.

For the question at hand, will not affect much.

thats good to know...

i put E plugs in a stock 300sx once when i first started riding... needles to say there were pretty little designs in the top surface of the piston after cranking it over.

 

[Kaveman]

In Yamaha 650/701/760 motors (and all Yamaha motors I presume) you can run a longer es plug, in an hs aplication. My not run great, but the piston will not hit the plug. This is in stock form. Dunno, but I think Yamaha was trying to idiot proff the motor.

For the question at hand, will not affect much.

Correct. That is because the combustion chamber is small in diameter and deep.