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Does NGK make spark plug caps for the Griso 8v?

http://www.amazon.com/gp/product/B0018J ... 02_s00_i00

NGK (8374) SB05E Spark Plug Cap

21rhV8inLCL._SL500_AA300_.jpg
 
I actually just changed my stock caps out for these on my last service. Anybody have issues with water getting in? I only ask because it seemed like the stock ones made a super tight seal at the top whereas these do not.
 
AutoGrok said:
I actually just changed my stock caps out for these on my last service. Anybody have issues with water getting in? I only ask because it seemed like the stock ones made a super tight seal at the top whereas these do not.
I had the same concern a while ago (see https://www.guzzitech.com/forum/196/7157.html)

NGK_resistor_8V.jpg


As you can see above, the reason why the SB05E does not fit tightly is because it is designed for 14-mm thread spark plugs. The truly correct model for a 10-mm plug would be the the SD05F (or SD05FP), which could be used with plugs like the NGK CR8EIX (4218) Iridium.

Nonetheless, folks told me that the SB05E works just fine.

Hope this helps.
 
Gotcha, thanks for the info. I normally wouldn't worry that much but I ride rain or shine all year round and I noticed a bit of water above the right cylinder cap when I took it out last.
 
I actually took the big rubber grommet off the plug caps that on my 8v and have never had a water issue. I ride in all conditions as well here in rainy Seattle. There's actually a hole in the bottom of the spark plug hole to the outside of the engine as a drain (shine a flashlight on the side of the engine and look down the spark plug hole.) I removed the rubber ends so I could more easily remove the cap from the plug during service without pulling on the wire. I now have a better solution involving a long tie-strap around the spark plug before I put on the cap, but I never reinstalled the rubber grommet.
 
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