Spark plug question

[Red Baron]

Hello all!

In my owner's manual, it mentions "If driving at high speed for long distances, switch to colder spark plug".

What is the standard? What is considered "long distances"?

I need inputs guys.

Thanks.

[Wheelman-111]

Greetings:

BPR6 HSA is standard.
BPR8 HSA is the plug for very hot climes and/or prolonged WOT.
Honda lists a BPR4 HSA for trips north of the arctic circle.

NGK has a BPR7 HS (No "A") which seems to be a good compromise between the easily-fouled 8 and the hotter-running 6.
I found mine at O'Reilly's for under $3.

[Red Baron]

Thanks!

Yes both 6 and 8 are mentionned in the book, and I did see something about the 4 on the net, but nothing on the 7.

Still, is riding at full speed for 10 minutes considered enough to replace to an 8, or is it an hour?

I don't ride very far, the scoot is only for fun, but I'd like to keep it as long as possible, and I certainly don't want a hole in the center of the piston...

What I'll do is get an 8 in case I decide to go to work with the scooter, which is a 56km commute, just for the fun of it. If it gets warm (yes it does up here in the Great White North during the summer), I'll get a 7 as per your suggestion.

Thanks again.

Greetings:

BPR6 HSA is standard.
BPR8 HSA is the plug for very hot climes and/or prolonged WOT.
Honda lists a BPR4 HSA for trips north of the arctic circle.

NGK has a BPR7 HS (No "A") which seems to be a good compromise between the easily-fouled 8 and the hotter-running 6.
I found mine at O'Reilly's for under $3.

[CaptDan]

Wheelman reveals:

I found mine at O'Reilly's for under $3.

I find O'Reilly is bogus to the EQUIVILENT of a $3 'bill.'



(I kid Mr FOXnooze. )

CaptDan>

[Kenny_McCormic]

If going WOT over 1 minute I would run the 8.

[stooley13]

Is running the 6 WOT for extended time periods really going to mess things up & if it does why/what will get messed up? What about the Autolite 4123 from autozone that is listed here on the forum as a replacement...anyone know the temp range on that plug?

[Wheelman-111]

Greetings:

Running a Spree or stock engine is not the same as a modified mill. The power output determines the heat production in large measure. Outside temps, oil ratios, jetting and yes, plug heat range add their variables, but an engine producing 3-5 HP is less at risk than one putting out 8 or more at RPMs never anticipated by Honda-san. If you've run your Spree with a #6 for several minutes at WOT without self-destruction, there's your evidence that a 6 is just fine.

[adark248]

If you've run your Spree with a #6 for several minutes at WOT without self-destruction, there's your evidence that a 6 is just fine.

Sounds like the best way to test. Will post pics of results tomorrow.

[wikked_spree57]

i run a B7HS ngk and it works good.

[Lunytune]

I'm having a problem finding a 6. Local owned auto store and Autozone don't have it. I like the color on the 6, nice gray. Conditions are variable, seldom WOT. What's next best option after the 6?

[dreamer1uk]

Hey,

I have used the BPR8 HSA for a while now and it seems to fit my bill nicely. I often take long commutes on the Spree been at WOT for several miles.No damage to report thus far

[toofast34]

your plug should be a nice lite tan color not grey. grey means it's running to lean or to hot.

[Lunytune]

your plug should be a nice lite tan color not grey. grey means it's running to lean or to hot.

I digress. Since I'm on the semi-colorblind side, it may be tan. But it's not LIGHT gray or whitish. It's a darker color, clean and not sooty.

I bit the bullet the other day, as I was in the Honda store anyway, and bought a couple of #6 plugs for $3.60 apiece.

[Red Baron]

Ok, got myself a BPR8HS, I'm told the HSA is no longer produced by NGK , I'll be able to try it and check it after a while, if it fits my style better than the BPR6HS (again, I'm told the HSA is no longer available) since I want to ride at max speed for a long commute I want to do. The "A" meant it was a cooler version, sort of a half way between 6 and 7 (7HS, 6HSA, 6HS, etc.)

Will report later. The 6HS I removed was tan colored, and I only did city driving. If the 8HS is fouled, will go back to the 6HS. I did notice a lack of power immediately, but it was very humid and that's normal, so I read on the NGK website's tech infos, did loose a few km/h. Will wait to have a beautiful warm day to really compare.

By the way, forgive my ignorance, but what does "WOT" stand for?

[Lunytune]

(again, I'm told the HSA is no longer available)

They lie. I just bought two BPR6HSA plugs from Honda house this week. If that's a local auto parts house, they want to keep your business by selling you something else. But buy what works and is available. I'm 25 miles from Honda House and understand. I had to be in town on other business and also to order a tire for my Helix or I might not have bought it.

WOT can mean many things but in this context, it means Wide Open Throttle.