B7HS or BR7HS???

[showmepro1200]

2002 SJ sparkplugs....

Yamaha owner's manual: BR7HS

Sticker on motor: B7HS

Which one is correct, or does it matter? I realize the only difference is the "R" is for resistor. What gives here?

 

[Big Kahuna]

hmmmmmmmmmm, I am gonna say B7HS, once you put a pipe and MSD Enhancer, you will change to a BR8ES (adding a resistor and the extened shaft (threads)).

 

[DaUpJetSkier]

hmmmmmmmmmm, I am gonna say B7HS, once you put a pipe and MSD Enhancer, you will change to a BR8ES (adding a resistor and the extened shaft (threads)).

on a greater yama head with the above mods plus some more, is a br8es sufficient? Are the threads the right length.

 

[showmepro1200]

hmmmmmmmmmm, I am gonna say B7HS, once you put a pipe and MSD Enhancer, you will change to a BR8ES (adding a resistor and the extened shaft (threads)).

So the only diff here between the recommendations (manual vs. motor) is the resistor, right?

 

[hangtime]

Thanks for clearing that up :biggthumpup:

 

[Matt_E]

I run non-resistor plugs with my MSD TL....it doesn't give me any problems, but perhaps I'll start running R's this year.

 

[SJet]

So, what determines the proper heat range? 7,8,9?

Stock is a 7

ADA Head is an 8?

 

[ClayMax]

Dragging up an oldie but couldn't find my answer in searches.

Have a friend's 02 SJ in my garage for the weekend and was about to change plugs. Sticker says BR7HS and that's what he has always run. So was about to pop the new ones in when I thought I'd check on here for gapping. I use BR8ES on my sxr so wasn't sure. Then I saw the threads about 7's and 8's etc.

I understand the length and heat codes just not sure if I should go with a cooler plug on his ski with his mods;

Wet pipe, tau ceti's, super pump cone.

Is this enough to warrant switching to the BR8HS? We ride lake Austin and our rides mostly consist of subs, freeriding and wot mini races.

Thanks.

 

[Mark44]

Try the BR8ES-S if you are a BR8es user. These have the non removeable plug wire end.

Mark44

 

[Big Kahuna]

Dragging up an oldie but couldn't find my answer in searches.

Have a friend's 02 SJ in my garage for the weekend and was about to change plugs. Sticker says BR7HS and that's what he has always run. So was about to pop the new ones in when I thought I'd check on here for gapping. I use BR8ES on my sxr so wasn't sure. Then I saw the threads about 7's and 8's etc.

I understand the length and heat codes just not sure if I should go with a cooler plug on his ski with his mods;

Wet pipe, tau ceti's, super pump cone.

Is this enough to warrant switching to the BR8HS? We ride lake Austin and our rides mostly consist of subs, freeriding and wot mini races.

Thanks.

BR8HS would be what you want..........

 

[jetskiking]

I was under the impression that the only time you needed to run resistor plugs was when you were using water injection so it didn't interfere with the induction pickup for the module.

 

[Matt_E]

I'm not sure what the fascination with resistor plugs is all about. :dunno:

 

[Idok]

me neither, I interchange and never noticed a differnce...

 

[onesojourner]

I run br8hs on both my sj 701 and 550. I don't know why thats just what I do.