XS11 plugs

[thetank2006]

What is the factory plug number for a 1981 xs1100. My bike has different plugs in that what are the stock number and I have no way of finding the proper number. Thanks


P.S. If you have a different plug than stock and think it is better please let me know, i am willing to try anything at least once.

[trbig]

NGK BP6ES.

When I got my XJ, it had the NGK B8ES plugs.... was thinking COOL... same as my ol' YZ 250. But alas.... apparently not right. I remember a posting on here once and it had the different brands and the numbers that would all work for these bikes. I tried a search, but couldn't find it. Maybe someone else knows where it is? It was just a few months ago I think.

Tod

[Hired_Goon]

NGK B6ES I only use NGK. Nothing else stack up IMO

http://ngk.com/results_appOther.asp?...D=31126&mfid=1

There is also a good cross reference on that site for comparing existing other brands.

[TopCatGr58]

Amazing what's in the Tech Tips!

Here's the Spark Plugs Tech Tip with more plugs than you'll know what to do with!!

I run Champion(ducking), but just like Oil and Tires, 100 opinions are available!
T.C.

[eleven_special]

Mine calls for NGK BPR6ES which I'm told is a hot plug.Up here in Canada maybe that makes a number or two difference from Southern States.

[bandet01]

i run the ngk bp6 plug and i was looking on the ngk wesite it is a hot plug but there are hotter plugs out there so does anybody know what it would hurt by running say a number 4 or 5 plug in the bike

[trbig]

Thank you TC.

Sorry... I did actually look there first, but obviously didn't look in the right place.


Tod


PS

Amazing what's in the Tech Tips!

Smart a@@ comment duly noted!!

[TopCatGr58]

Hey Tod,

Better a Smart@ss, than a DumbSh*t!

Bandet, too hot a plug could cause detonation, pinging. With a worn engine, it is sometimes recommended to go up one heat range to assist in firing in slightly oily conditions. Also in very cold climate ranges. In hot areas, a slightly colder plug may be needed!
T.C.

[trbig]

Better a Smart@ss, than a DumbSh*t!

Yeah TC... lol... But who likes either one of 'em??

Tod

[BLUEJEEPLAB]

Since the floodgate is opened, has anyone tried the Splitfire? I installed them in my Wrangler with fair results, slight gain in MPG being the most notable result.

I have a problem (with the XS) with full throttle roll and detonation (purring at 4K in 5th, roll on hard, get spark knock). Cooler plug help or will a hotter plug help? I am always running at least 93 octane. My sense is that hotter isn't always better. Or should I be boning up on how to time the ignition (my car mech experience says I have advanced ignition to cause detonation)?

[GNEPIG]

spark plugs 101

.. the heat range of a spark plug only determines the plugs ability to transfer heat from the hottest part of the plug[where the spark happens] to the engine head. your ignition determines how hot your spark is going to be, the spark plugs are only delivering the goods.
.. if you have a high compression engine that puts out the big horses, then all of that horsepower is creating big heat!. the guys with the big horsepower engines use cooler plugs to transfer heat quicker to the head.. us guys with the regular compression, overly rich running and oil burning old motors, need a hotter heat range to keep the plugs from fouling.
.. i run the NGK BP6EAs because its only 10 miles to work for me. these bikes are not fully warmed up until about 10 miles of service. the cooler plugs i have tried seem to run darker and the bike doesnt seem to warm up as fast just riding it to work and back, and i live in florida.. if i had to travel 40 miles to work one way i would use a cooler running plug.. the BP6EAs are the hottest running plugs i would ever use, i would not go hotter!.
.. a plug is a plug no matter what brand, but i think the splitfires are crap. sorry Gino, and yes you should check your timing.

[LoserShoes]

Your vacuum advance is probably sticking. When you open the throttle the vacuum will drop and retard the spark timing.

Steve

[GNEPIG]

.. i run the NGK BP6EAs

.. i meant to say BP6ES.