Proper spark plugs?

aaron7 · Post by **aaron7** » Wed Sep 16, 2009 6:53 am

What's the proper plug to be running in these? Or what works best?

Smithers · Post by **Smithers** » Wed Sep 16, 2009 7:28 am

Here you go! I knew you would ask so I was already looking for the pic. I recommend just buying a box from somewhere. I think I paid like $20 for mine. They are super cheap but buying one or two will have you paying much more.

aaron7 · Post by **aaron7** » Wed Sep 16, 2009 7:29 am

Is the D8HA the factory replacement or one you've found works better?

Smithers · Post by **Smithers** » Wed Sep 16, 2009 7:32 am

This is a very common, I mean VERY common plug for early Honda motorcycles. That's why I bought the box

. They work PERFECT for these bikes and will last forever. There is absolutely no reason to buy a hotter, colder or different plug unless someone is modifying the engine or something crazy like that... even still.. Here is a common Ebay description of Hondas that the plug is ideal for:
They will fit the following Honda Models:
SL90, SL 90, SL-90 (69), CT90, CT 90, CT-90, Trail 90 (66-79), CT200, CT 200, CT-200 (64-66), CM91, CM 91, CM-91 (66-69), CA200, CA 200, CA-200 (63-66), SL175, SL 175, SL-175 (70-72), CL175, CL 175, CL-175 (68-73), CB175, CB 175, CB-175 (69-73), CA175, CA 175, CA-175 (68-70), CB72, CB 72, CB-72, Superhawk (62-66), CA72, CA 72, CA-72, Dream (62-66), CL77, CL 77, CL-77, Scrambler (65-68), CB77, CB 77, CB-77, Superhawk (62-68), CA77, CA 77, CA-77, Dream (62-69)

Honda CT90 1966-69
Honda CA72 CL72 CB72 1962-66
Honda CA77 CB77 CL77 1962-69
Honda CA95 1962-66
Honda CM91 1966-69
Honda SL90 1969
Honda CA175 1968-70
Honda CB175 1969-73
Honda CL175 1968-73
Honda SL175 1970-72
Honda CA200 1963-66
Honda CT200 1964-66
Honda ATC90 1970-78
Honda ATC110 1979-81

aaron7 · Post by **aaron7** » Wed Sep 16, 2009 7:33 am

Wow, ok, looks like a box is around $25 or so. Guess I'll order one!

Buckets81 · Post by **Buckets81** » Wed May 30, 2012 4:35 pm

So I ordered a set of plugs from Thailand (apparently a mistake) and they sent me a set of D6HS instead of D8HA. Will they work?

Jetblackchemist · Post by **Jetblackchemist** » Wed May 30, 2012 7:47 pm

Them thar be stop and go plugs they sent ye. And yes they be a fine plug fer ye apparatus.

The D means 18mm threads, the 6 and 8 are temperature of plug(the lower the number the hotter it is the higher the number colder and the better for racing), the H is the thread reach, the S standard electrode, A means special construction or the taper without threads before the threads start.

Buckets81 · Post by **Buckets81** » Wed May 30, 2012 8:36 pm

Jetblackchemist wrote:Them thar be stop and go plugs they sent ye. And yes they be a fine plug fer ye apparatus.

The D means 18mm threads, the 6 and 8 are temperature of plug(the lower the number the hotter it is the higher the number colder and the better for racing), the H is the thread reach, the S standard electrode, A means special construction or the taper without threads before the threads start.

I knew there was a reason I registered for this forum.

Thank you. I'll use them until I burn them out and then I'll buy a proper set of plugs from someone in Amurrica.

ByTheLake · Post by **ByTheLake** » Thu May 31, 2012 10:13 am

Smithers wrote:This is a very common, I mean VERY common plug for early Honda motorcycles. That's why I bought the box . They work PERFECT for these bikes and will last forever. There is absolutely no reason to buy a hotter, colder or different plug unless someone is modifying the engine or something crazy like that... even still.. Here is a common Ebay description of Hondas that the plug is ideal for:
They will fit the following Honda Models:
SL90, SL 90, SL-90 (69), CT90, CT 90, CT-90, Trail 90 (66-79), CT200, CT 200, CT-200 (64-66), CM91, CM 91, CM-91 (66-69), CA200, CA 200, CA-200 (63-66), SL175, SL 175, SL-175 (70-72), CL175, CL 175, CL-175 (68-73), CB175, CB 175, CB-175 (69-73), CA175, CA 175, CA-175 (68-70), CB72, CB 72, CB-72, Superhawk (62-66), CA72, CA 72, CA-72, Dream (62-66), CL77, CL 77, CL-77, Scrambler (65-68), CB77, CB 77, CB-77, Superhawk (62-68), CA77, CA 77, CA-77, Dream (62-69)

Honda CT90 1966-69
Honda CA72 CL72 CB72 1962-66
Honda CA77 CB77 CL77 1962-69
Honda CA95 1962-66
Honda CM91 1966-69
Honda SL90 1969
Honda CA175 1968-70
Honda CB175 1969-73
Honda CL175 1968-73
Honda SL175 1970-72
Honda CA200 1963-66
Honda CT200 1964-66
Honda ATC90 1970-78
Honda ATC110 1979-81

I never compared the plugs for my old fleet of Hondas, but I have 4 machines in the list above. I'll order a whole box of 10.