Zex sparkplugs to fit my motorcycle.

[Animedevildog]

I won a 1998 Honda Shadow 750CD2 American Classic Edition (ACE) and I am gathering together all the items that I need for a serious boost in power. One of the things that I want to do is replace the sparkplugs with something much better than factory stock. The plugs that I wish to run are Zex plugs. I find that the insulated center electrode should give plenty of protection, and that the three prong design would give all the advantages of a certain brand of plug, that begins with the letter B and is, in my opinion, way overrated. What I need to know is whether any of the plugs Zex offers will fit my Shadow engine. It is a V-twin engine with duel plug heads.

This is what is recommended for my bike from either Denso or NGK:

Standard: DPR8EA-9(NGK) or X24EPR-U9(DENSO)
Cold Climate (below 5°C, 41°F): DPR7EA-9 or X22EPR-U9
Extended High Speed Riding: DPR9EA-9 or X27EPR-U9

[amick]

I am currently unable to cross referance those numbers you gave me and I do not have a standard application for a 750 Honda Shadow motor. If you could provide me the deminsions on the plug though (if its a 14mm size, what the reach is, and if its gasket seat or tappered seat style) I may be able to come up with one of our plugs to fit.

[Animedevildog]

Ok, from what I have been told from a forum friend of mine who rides an ACE like mine, it is a 12mm plug with a 19mm reach. (non-tapered)

I think I shall be going to Starting Line later today to find out specifically what I need demensions-wise.

[amick]

If the plugs are the size you suggest above I unfourtunatly do not have a plug available for you at this time.

[Animedevildog]

Thank you. Maybe, if need be, I could mod the heads using helicoils to allow a set that Zex has available to fit. I know that trick should work, because it is done with car engines that blow out a plug. (has actually happened to one of my cars.)