1st Gen plug caps and plugs

[KIC]

So I did a search. Read some threads where it was discussed as to the use of OEM caps or the NKG caps (YD-5F) and NGK plugs. So it looks like the NGK YD-5F caps are OK. But I could not get a good read on which plug to use with them.

 

DP8EA9 non-resistor....or DPR8EA9 resistor plugs ?? I have the DPR7EA-9 in it now and want to get the best plug for my 89 1st Gen.

 

As A side note: I have noticed in a lot of threads, parts are discussed between knowledgeable members. The problem is, it is rare that the actual part numbers or replacement part numbers are actually listed in the thread leaving us who read the thread looking for information wondering what part to look for.

[Great White]

The oem calls for both a resistor cap and a resistor plug. I won't get into the discussion on whether or not you need both, as the oem calls for both. That being said:

 

The original spark plugs are NGK DPR8ES-9. Yamaha lat r recommended the platinum plugs to help eliminate misfires -DPR8EX-9. You can use those or go with the "upgraded" iridium version DPR8IEX-9. (Stock number 2202). I run the iridium plugs and will never run the original plugs again. There's just that much of a difference in how my bike runs.

 

You can refurbish the oem plug caps, I have (mor to prove I could more than anything else). But I don't recommend it to the average joe. Better to just go out and buy the replacement caps: NGK XD05FP. That number might just confuse the parts guy so give him the NGK stock number 8641. When you install the new plug caps, take some end cutters and nip about 1/4" off the plug wire to give the cap fresh insulation/wire to thread in to and make good contact.

 

if you go to the Canadian NGK web site they have a parts finder application that will give you both the numbers for plugs and caps.

 

cheers

Edited July 14, 2015 by Great White

[bkuhr]

I replaced my 1st gen caps with NGK XD05F with a different bend that fits better. In post #11 here http://www.venturerider.org/forum/showthread.php?61507-NGK-spark-plug-caps&highlight=xd05f

[KIC]

I could not find the exact cap so I looked into what the NGK Numbers meant since I could find caps close to the YD-5F but with a different letter. I also bought the DPR8IEX-9. (Stock number 2202) plugs...but without asking how much. I was quite shocked when the plugs came to $32.00 +tax

 

Well I will install the caps and plugs this weekend and see what happens.

 

resistor_covers.pdf

[Great White]

http://www.ngksparkplugs.ca/products-resistor-covers-and-caps.cfm

 

bottom of the page you'll find a pdf that tells you everything you need to know about the plug caps.

 

the iridiums are expensive compared to the standard plugs, but they were worth every penny to me after i installed them and went for the first ride...

[Great White]

Yd-5f breaks down to: 120 degree bend, 10 and 12 mm thread, 5 kohm resistance, for terminal stud.

 

For the xvz1200/1300 NGK parts catelog calls for xd05fp which breaks down to: 102 degree bend, 10 and 12 mm thread, 5 kohm resistance, for terminal stud, special waterproof cover.

 

Personally, I'd be going for the manufacturer recommended xd05fp.....which I already did!

 

Fits perfect, works perfect.

 

[KIC]

Well I finally installed the Iridium Plugs and the new caps. Added 2 lbs of air in the front and back tires to bring them up to spec and changed the oil. hen I ran to Harbor Freight on a little ol test run.

 

I would like to thank who ever took my old bike and left the rocket ship behind !! That thing was flat out scary ! I will definitely be getting a ticket soon.

 

I easily over redlined it to 8500 in no time, hit over 60 with very little ( 1/2?) throttle in 1st and 2nd and immediatly backed off of 3rd back to 2nd to slow down.

 

So the things I have done to my bike that has really transformed it from an OK runnig bike into a screamer was:

 

New Diaphragms

New wires

New Iridium plugs

New caps

 

I know the diaphragms made a huge difference and the wires made a difference, each one incremental. The caps I think were a big problem and adding the Iridium plugs was just icing on the cake. I will now have to give my dear friend Dave and his 2nd Gen a two day head start to keep up.

 

Oh how happy life is...

[cimmer]

Make sure you sync the carbs also after the new diaphragms as that will help also.

Then hang on

Rick F.

[videoarizona]

I will now have to give my dear friend Dave and his 2nd Gen a two day head start to keep up.

Oh how happy life is...

 

Just for that, I'll ride my 1st Gen! Grins!

(after I get new Diaphragms and a new clutch spring!!) Slamming 2nd doesn't lift the front...clutch slips! Ah well...after 25 years...that's dam good service for an original spring!