GK73A - Is this sufficient spark ? (video) https://bgsxr400.runboard.com/t182030 Runboard| GK73A - Is this sufficient spark ? (video) en-us Fri, 29 Mar 2024 11:27:37 +0000 Fri, 29 Mar 2024 11:27:37 +0000 https://www.runboard.com/ rssfeeds_managingeditor@runboard.com (Runboard.com RSS feeds managing editor) rssfeeds_webmaster@runboard.com (Runboard.com RSS feeds webmaster) akBBS 60 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997803,from=rss#post1997803https://bgsxr400.runboard.com/p1997803,from=rss#post1997803Thanks, appreciate that nondisclosed_email@example.com (gsxr400rr)Thu, 12 Feb 2009 00:04:56 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997802,from=rss#post1997802https://bgsxr400.runboard.com/p1997802,from=rss#post1997802the plugs WILL be pre set in the factory !! ive been a mechanic for 22years and have never had to adjust a plug gap on a new set of plugs !! as long as theres no obvious sign they have been damaged i dont even check em anymore .... laters ...mick nondisclosed_email@example.com (madmickyb)Wed, 11 Feb 2009 23:54:51 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997800,from=rss#post1997800https://bgsxr400.runboard.com/p1997800,from=rss#post1997800They should all be the same sized gap.nondisclosed_email@example.com (banditmax1988)Wed, 11 Feb 2009 17:05:47 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997799,from=rss#post1997799https://bgsxr400.runboard.com/p1997799,from=rss#post1997799Cheers for the input guys I hope I don't have to set them, but these plugs fit so many bikes from a DR350 through to a Hayabusa and am sure there not all pre set are they for all those bikes ? I will keep you posted and let you know I guess you'll be wanting to know how I did the airfilters ? (there amazing) ok I'll get the pics done and update me other post now nondisclosed_email@example.com (gsxr400rr)Wed, 11 Feb 2009 16:21:27 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997798,from=rss#post1997798https://bgsxr400.runboard.com/p1997798,from=rss#post1997798hi im following your progress as ive given up on mine after spending so much (for the meantime anyway) but u should not have to gap those plugs they should be set correct being double electrodesnondisclosed_email@example.com (scooby666)Wed, 11 Feb 2009 16:10:22 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997797,from=rss#post1997797https://bgsxr400.runboard.com/p1997797,from=rss#post19977970.6mm gap sounds about right, all you need to do is check them on the new plugs, they should be pre gapped at the factory. If you need to adjust it carefully bend the tabs with a small pair of pliers.nondisclosed_email@example.com (banditmax1988)Wed, 11 Feb 2009 16:08:54 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997796,from=rss#post1997796https://bgsxr400.runboard.com/p1997796,from=rss#post1997796quote: So my next question is ........ (drum roll). What gap should the plugs be for the GK73A ? and How do I gap a plug with two of these things on it : I'm answering my own questions again Well I just been onto evilbay and purchased me first ever feeler gauge I sorta knew there was two types, metric and imperial, I got the metric starting at .05 and working up to 1.0mm. I have been looking at me japanese GK73A manual and I noticed this : Number 17 was the spark plug in the diagramme, and the plug is the CR9EK which luckily I bought today lol but the last bit of data says W 0.6 DAI, which am hoping is a spark plug gap of 0.6mm ? I then found this data for the GK71F : And the gap for the spark plug for them is 0.6 - 0.7mm so am hopin that the reference in the jap manual for my bike 0.6 DAI means 0.6mm gap for the spark plug. As for gapping the plugs anyone have any tips on how I should do this ? I have two prongs to bend but I am unsure on correct procedure. Cheers. Matt nondisclosed_email@example.com (gsxr400rr)Wed, 11 Feb 2009 13:53:58 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997795,from=rss#post1997795https://bgsxr400.runboard.com/p1997795,from=rss#post1997795Right I have just spent another £30 on plugs. I had a look at the ones you suggested Gary the NGK C8HSA plugs but there for the GSX-R 400H model which is the 1987 Suzuki year code: H, GSX-R400H, GSX400RSH, GSX400R-4. The year code for my bike is : 1989 Suzuki year code: K, GSX-R400RK, GSX400RFK and the correct plugs for the GK73A are NGK CR9EK. Confusing or what So my next question is ........ (drum roll). What gap should the plugs be for the GK73A ? and How do I gap a plug with two of these things on it :   Cheers in advance nondisclosed_email@example.com (gsxr400rr)Wed, 11 Feb 2009 12:16:07 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997786,from=rss#post1997786https://bgsxr400.runboard.com/p1997786,from=rss#post1997786Thanks for the tip there spenner Everything in the carbs has been replaced so a new set of plugs might just do the trick. I'll keep y'all posted when I get em hopefully with good news. Matt nondisclosed_email@example.com (gsxr400rr)Tue, 10 Feb 2009 12:59:09 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997785,from=rss#post1997785https://bgsxr400.runboard.com/p1997785,from=rss#post1997785Looking at the video of your plugs and with you saying the bike would stall at traffic lights and the fact you have tickover problems, this all sounds like typical carb problems mate. By cahnging the plugs you can easily eliminate them, then follow micks carb advice, fingers crossed you should be running. An old tip for free, if you have been working on your bike and trying to start the it for a while but it wont start, take your plugs out, clean them up wiht a wire brush then put them in a warm oven for a while, this helps burn off the petrol/oil residue left by the wire brush, putting them back in the bike ususlly results in it firing up if the problem was fouled plugs. cheers spennernondisclosed_email@example.com (1965spenner)Tue, 10 Feb 2009 10:54:40 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997783,from=rss#post1997783https://bgsxr400.runboard.com/p1997783,from=rss#post1997783Thanks for the info Gary, thats helped me a lot I'll get lookin for best place to get those plugs then and try again Keep ya posted. Matt nondisclosed_email@example.com (gsxr400rr)Tue, 10 Feb 2009 10:33:27 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997782,from=rss#post1997782https://bgsxr400.runboard.com/p1997782,from=rss#post1997782Matt I would say seeing as you're getting a spark your CDI unit is OK and like wise the signal generator. Not sure which way the main idle screw on the 73 works as the carb setup is completely different to mine. The pilot jet adjusters - are you just coming up against spring pressure when you screw them in? If you're taking the carbs off maybe it would be worth lifting all four adjusters out and then putting them back in without the springs quickly to see what they feel like. Don't graunch them into the holes though. Plugs, according to the info I have here should be: NGK C8HSA or Nippondenso U24FSR-U. HTH and keep at it. It'll be worth it in the end - they're little jewels these bikes. nondisclosed_email@example.com (garynortheast)Tue, 10 Feb 2009 09:57:33 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997781,from=rss#post1997781https://bgsxr400.runboard.com/p1997781,from=rss#post1997781Thanks for the input guys, much appreciated. I think I am going to get some new plugs see I got the bike as a non-runner, I put some fresh fuel in it and new plugs and it started, worked and idle'd believe it or not, it was coming back from a high-speed blast from skeggy that I found it stalling at lights and not maintaining idle and it's done it ever since Can I ask a few questions then please .. 1. Can we rule out CDI as being faulty ? 2. Can we rule out signal generator as being faulty ? 3. IF so whats left for me to replace lol 4. I feel I may have turned the main engine idle screw wrong way, how do I go about getting this right again ? maybe this is why it wont start if the main engine idle was turned down but how can I find out if I can't start the engine ? Last Q,.... Question 5 ... Spark plugs, I think my next plan of attack will be to remove the carbs, and set the idle screws to 2.75 turns out each, I dont like twisting them all in until they seat because I feel I will damage the idle screws, the ones I took out were a bit bent, unreal ... see when screwing them in it gets stiff like its seated, but if I put more pressure on it starts screwing in even more and I just dont know when to stop screwing it in. I will have another go in until it proper stops and 2.75 turns out, thats what me factory pro manual says too. Oops me question on which plugs to get, man am so confused, I have just done a search online and this is what I get : www.bitzforbikes.co.uk Suzuki GSXR 400 (RK (GK73A) 89) - C-8HSA NGK Standard Spark Plug www.wemoto.com Suzuki GSXR 400 J/RR/RAK (GK73A) 88-90 - Spark Plug NGK CR9EK www.gear4bikes.com Suzuki GSXR400 (GK71A/GK71B/GK71F/H/GK73A) - NGK CR8HSA Spark Plug   So whos right, whos wrong, whats the CORRECT plug for a 89 400RR SP2 ? If anyone can help me with Q 1 - 5 I would really appreciate it. Thanks again guys, you all get a go on my bike when its fixed, I think you all earned it Matt.nondisclosed_email@example.com (gsxr400rr)Tue, 10 Feb 2009 09:02:13 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997779,from=rss#post1997779https://bgsxr400.runboard.com/p1997779,from=rss#post1997779Thats enough spark i reckon, CDI should be fine too as you have a spark there. Pilot screws go clockwise for leaner and anti clockwise for richer. set them for what the factory pro kit recommended was to start with. Make sure your choke is opening fully too. nondisclosed_email@example.com (banditmax1988)Tue, 10 Feb 2009 01:41:30 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997778,from=rss#post1997778https://bgsxr400.runboard.com/p1997778,from=rss#post1997778there looks to be a fairly good spark there from what i can see ...BUT just because there sparking out of the bike dosnt mean there sparking under compression when in the cylinder . i'd say get a new set or clean those ones up if there fairly new as you say ....i'd say looking at those plugs you got carb probs 3+4 are way too rich !! i'l send you a pm with a link to carb tuning please dont post it on here for open viewing laters....micknondisclosed_email@example.com (madmickyb)Mon, 09 Feb 2009 22:50:09 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997776,from=rss#post1997776https://bgsxr400.runboard.com/p1997776,from=rss#post1997776The added tune only took a min gixergrl thought it would be better to hear that than my engine rattling So are my plugs shot Gary ? they were brand new cost me £30 how come there shot already ? am I gonna have to keep replacing em ? Can you tell me if the spark is sufficient or does it look weak to you, and where should I start looking next ? signal generator ? CDI ? Finally if you do think I need to bin these plugs, can you suggest the best ones for the GK73A. Cheers. Matt nondisclosed_email@example.com (gsxr400rr)Mon, 09 Feb 2009 19:08:36 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997774,from=rss#post1997774https://bgsxr400.runboard.com/p1997774,from=rss#post1997774Whack some new plugs in there Matt, the black one looks well beyond use! And don't bother with the expensive iridiums, they do no more than resist tip erosion a little longer, they don't actually make any better a spark than the standard plugs. Pilot jet screws screw out to weaken the mixture. Try 2.5 - 2.75 turns out from fully in as a starting point.nondisclosed_email@example.com (garynortheast)Mon, 09 Feb 2009 17:00:08 +0000 Re: GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997768,from=rss#post1997768https://bgsxr400.runboard.com/p1997768,from=rss#post1997768PMSL ... I'm not at all technically minded so I cant offer a suggestion but I watched your video and was amazed that you bothered to put a soundtrack on it. 10/10 for effort nondisclosed_email@example.com (Gixergirl79)Mon, 09 Feb 2009 13:17:26 +0000 GK73A - Is this sufficient spark ? (video)https://bgsxr400.runboard.com/p1997764,from=rss#post1997764https://bgsxr400.runboard.com/p1997764,from=rss#post1997764Howdy guys Right, I've spent about 700 quid on this bike and it's still not working Anything that can be replaced has been replaced, new stage 3 carb kit, new emulsion tubes, new idle jets, new plugs (3 month old) new barnett clutch, new cables, new filters, new bulbs all round... I don't know what else I can do to make this bike work, so I now ask you for your expert knowledge. OK first problem I want to get round is it will not start off the button, when I hit the start button the engine cranks over and theres a burbling in the exhaust like it wants to start, but the bugger just wont fire I have taken out all the plugs and took a video to show you them all sparking, plug 1 and 2 was both brown and plug 3 and 4 was both jet black. I am not sure what this means, could it be that the only reason this is not starting is because the idle screws arn't set correctly ? also I have fiddled about with my idle and not sure if twisting it forward or backwards raises the revs, maybe its set too low for it to fire, I am not sure. Anyway heres what the plugs looked like : Here is the VIDEO : http://www.youtube.com/watch?v=ABCgSt5KAf4 Any ideas why its not starting before I take a hammer to it Many thanks in advance nondisclosed_email@example.com (gsxr400rr)Mon, 09 Feb 2009 11:49:18 +0000