Triumphrat

WoodsieIII

I just fitted a set of DPR8EA9 plugs to my bike. The book says to use DPR9EA9. Will having one range hotter plugs make a lot of difference? At this stage I cant get the 9's.
Rode the bike for about 120 klms this morning bike seems a lot smoother. Probably just the fact its got new plugs, the old ones had done about 30k klms. I'm just wondering about the difference in heat range tho.

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I believe there is no such thing as accidents. When I ride I must leave enough room for others stupid mistakes, added to that is enough room to make my own.

Wombat

Acording to the TBS Owners Supplement, DPR8EA9 is the correct plug.

You may want to consider the DPR8EIX-9 Iridium plugs in your TBS.

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Bob

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WoodsieIII

Thunderbird, not Thunderbird Sport.
OK I just checked my owners manual, and it recommends the 8's.
Another instance where Haynes differs from the makers specs.

[ This message was edited by: WoodsieIII on 2006-08-26 23:33 ]

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I believe there is no such thing as accidents. When I ride I must leave enough room for others stupid mistakes, added to that is enough room to make my own.

Tre900

I drove my adventurer with 8's and the book recommends 9's.

They were put in by a triumph service department and I had at least put 8k miles on the. I felt like the bike may have actually had more jump with the 8's.

I haven't gone back though to experiment. I don't think it hurts, just may burn more fuel due to hotter spark?

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agrustis

How can spark plugs burn more fuel? The carbs dictate how much fuel is sprayed in to burn? They may ignite more efficient but don't think you will burn more.

Just my thoughts

WoodsieIII

More efficient combustion means more power equals smaller throttle opening means less fuel burnt.

__________________
I believe there is no such thing as accidents. When I ride I must leave enough room for others stupid mistakes, added to that is enough room to make my own.

carlosjedi

I recommend to you spark plugs Nippon Denso , ND X24EPR-U9 or X27EPR-U9 ,have electrode in “u” ,and I always use them with very good results,they do not lubricate and they improve the cold start.

:wink: :wink: :-D

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GeoffE

Hi,

Even the two official Triumph Service Manuals ('95 & '96) that I have conflict with each other. One showing DPR8EA9, and the other showing DPR9EA9, for all models.

I have a theory, and it is borne out of running a XT600 Tenere single with a DPR8EA9 fitted in summer, and a DPR7EA9 fitted in winter, for ease of starting the "thing" (or is it the other way round? - corrected, thanks WoodsieIII)!

Could it be that Triumph recommended the warmer spark plug when selling to the cooler European markets, and then recommended the cooler spark plug when it moved into the warmer US/Oz/etc... markets?

Just a thought.

Ciao,
Geoff
:wink:

[ This message was edited by: GeoffE on 2006-08-28 13:40 ]

WoodsieIII

Yeah maybe but its the other way around, the 8 is actually hotter than the 9. Dont know why they chose to number heat ranges backwards.

__________________
I believe there is no such thing as accidents. When I ride I must leave enough room for others stupid mistakes, added to that is enough room to make my own.

Crusader3020

my haynes manual says to use the 9's

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