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    #1

    Hotter than NGK D8EA?

    I know that this is a very sensitive subject for many and I apologize in advance:
    But, can I find an spark plug a little hotter that NGK D8EA?
    I'm getting a certain amount of fouling and I'll like to try something hotter before I go for an overhaul (have 31K miles). Apparently I'm getting oil on the chamber, not too much and I'm not a mosquito fumigator. But I'm changing the sparks (cleaned by sand blasting) quite often.
    Again, I do not want to hurt someone feelings.
    Thanks in Advance.
    Any other recommendations are WELCOME
    Tags: None
    #2
    Try a D7EA , lower the # hotter the plug
    1984 GS1100GK newest addition to the heard
    80 GS 1000gt- most favorite ride love this bike
    1978 GS1000E- Known as "RoadKill" , Finished :D
    83 gs750ed- first new purchase
    85 EX500- vintage track weapon
    1958Ducati 98 Tourismo
    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
    If it isn't going to make it faster or safer it isn't worth doing

    Comment

      #3
      Hotter than NGK D8EA?

      Thanks! Very Much

      Comment

        #4
        Are you sure it's oil fouling and not gas? Are you addiing oil regularly?
        Make sure you are not overfilling crankcase-check level when cold on centerstand.
        1981 gs650L

        "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

        Comment

          #5
          Originally posted by tom203 View Post
          Are you sure it's oil fouling and not gas? Are you addiing oil regularly?
          Make sure you are not overfilling crankcase-check level when cold on centerstand.
          Good point I should have added that .
          1984 GS1100GK newest addition to the heard
          80 GS 1000gt- most favorite ride love this bike
          1978 GS1000E- Known as "RoadKill" , Finished :D
          83 gs750ed- first new purchase
          85 EX500- vintage track weapon
          1958Ducati 98 Tourismo
          “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
          If it isn't going to make it faster or safer it isn't worth doing

          Comment

            #6
            When I got the bike (Suzuki GS650G, 1981, now 31k miles) the stock air cleaner system was not there instead it has now the K&N High Flow filters. That will contribute for a leaner mix, but I'm not 100% sure of the condition of the carburetors, maybe they are set too rich.
            Thanks for your help.

            Comment

              #7
              Try a NGK iridium plug with the proper heat range.
              I would not run a hotter plug.
              EDIT
              This advice is given with your info that you are burning oil.
              Last edited by chef1366; 12-31-2012, 12:15 AM.
              1983 GS 1100E w/ 1230 kit, .340 lift Web Cams, Ape heavy duty valve springs, 83 1100 head with 1.5mm oversized SS intake valves, 1150 crank, Vance and Hines 1150 SuperHub, Star Racing high volume oil pump gears, 36mm carebs Dynojet stage 3 jet kit, Posplayr's SSPB, Progressive rear shocks and fork springs, Dyna 2000, Dynatek green coils and Vance & Hines 4-1 exhaust.
              1985 GS1150ES stock with 85 Red E bodywork.

              Comment

                #8
                Originally posted by Raulmanny50 View Post
                When I got the bike (Suzuki GS650G, 1981, now 31k miles) the stock air cleaner system was not there instead it has now the K&N High Flow filters. That will contribute for a leaner mix, but I'm not 100% sure of the condition of the carburetors, maybe they are set too rich.
                Thanks for your help.
                I would start with the carbs, rather than the plugs

                Page Not Found
                http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf


                Take them apart and clean them, replace the O rings, check to see what jets/needles are in there

                How's the oil consumption?

                BTW, 31k is nothing as far as mileage goes
                1978 GS 1000 (since new)
                1979 GS 1000 (The Fridge, superbike replica project)
                1978 GS 1000 (parts)
                1981 GS 850 (anyone want a project?)
                1981 GPZ 550 (backroad screamer)
                1970 450 Mk IIID (THUMP!)
                2007 DRz 400S
                1999 ATK 490ES
                1994 DR 350SES

                Comment

                  #9
                  Originally posted by Raulmanny50 View Post
                  When I got the bike (Suzuki GS650G, 1981, now 31k miles) the stock air cleaner system was not there instead it has now the K&N High Flow filters. That will contribute for a leaner mix, but I'm not 100% sure of the condition of the carburetors, maybe they are set too rich.
                  Thanks for your help.
                  Could be that carbs were not rejetted for the individual (?) filters- you have to pull them off and find out. At the very least drop a fuel bowl and pull off main jet for clues. You MIGHT be able to get at #1 or #4 carbs main jet without pulling them entirely off, but I doubt it.
                  Are the EPA blocking plugs missing over idle/air mixture screws?

                  Edit;Can you take a pic of carb setup?
                  Last edited by tom203; 12-30-2012, 06:50 AM. Reason: info
                  1981 gs650L

                  "We are all born ignorant, but you have to work hard to stay stupid" Ben Franklin

                  Comment

                    #10
                    Originally posted by tom203 View Post
                    Could be that carbs were not rejetted for the individual (?) filters- you have to pull them off and find out. At the very least drop a fuel bowl and pull off main jet for clues. You MIGHT be able to get at #1 or #4 carbs main jet without pulling them entirely off, but I doubt it.
                    Are the EPA blocking plugs missing over idle/air mixture screws?

                    Edit;Can you take a pic of carb setup?
                    With no air box and pods the carbs will come off easily enough. Give them a good cleaning . and check the jetting. With pods you will probably need a jet kit , because you are going to need the needles to get it right. Maybe the PO already did this.
                    1984 GS1100GK newest addition to the heard
                    80 GS 1000gt- most favorite ride love this bike
                    1978 GS1000E- Known as "RoadKill" , Finished :D
                    83 gs750ed- first new purchase
                    85 EX500- vintage track weapon
                    1958Ducati 98 Tourismo
                    “Remember When in doubt use full throttle, It may not improve the situation ,but it will end the suspense ,
                    If it isn't going to make it faster or safer it isn't worth doing

                    Comment

                      #11
                      just a couple thing I thought of

                      sand blasting will not always make a problem plug fire under pressure.

                      changing 4 new spark plugs are easier than doing any carb service.

                      next check the physical connection of resistor caps to the wires for corrosin. broken insulation on wires or cracked caps can crossfire / or sidefire to the engine instead of sending the jolt thru the resistor and sparkplug. Also if the resistance is much over 8K ohms thru the hard plastic cap that might be your issue.

                      the path of least restiance theory and all.

                      I like b7's when it is under 60 degrees F and 6's when it is under 40. your bike will warm up to proper temps and keep temerature when riding in the cold -aircooled not air frozen - gotta be hot for the metals to be at operating tolerances- this tuning detail is for after you get the jetting set.. The different heat range plugs will make the warm up different and change overall running temperature- so remember temprature of the weather is the factor for sparkplug heat range of a GS.... cold plugs sputter a little bit longer til properly hot. 8 's are too cold for winter time
                      SUZUKI , There is no substitute

                      Comment

                        #12
                        I had a problem w the "no-firing" of cylinder #1 then I took it to a DIFFERENT motorcycle shop where an old guy realized that the floater for the carb was stuck.
                        Besides I thought had problems w/ the battery, actually was a burned wire (W/G) related to the AC Generator. The Bike Is running great and the maintenance-free battery from Feb. 08 is holding well. Yuppy! Tomorrow, to my job on the bike!

                        Comment

                          #13
                          Where to I get the iridium? what number, name?

                          Comment

                            #14
                            NGK DR8EIX is the Iridium IX plug type. You can get the plugs at any auto supply store.
                            sigpicMrBill Been a GSR member on and off since April 2002
                            1980 GS 750E Bought new in Feb of 1980
                            2015 CAN AM RTS


                            Stuff I've done to my bike:dancing: 1100E front end with new Sonic springs, 1100E swing arm conversion with new Progressive shocks installed, 530 sprockets/chain conversion, new SS brake lines, new brake pads. New SS fasteners through out. Rebuilt carbs, new EBC clutch springs and horn installed. New paint. Motor runs strong.

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