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Post by motormike on Aug 12, 2008 17:03:13 GMT -5
I was going to post this under General, being new here.. but I read the fine print so I decided to post my problen here.
Rode my SR last saturday... fired right up...after about 40 minutes I stopped.. then 20 minutes when to start the bike .. Nothing. No pop.. no snort. Nothing. Hot button on.. off.. choke on.. off... checked the plug.. clean.. bright blue spark.. pour gas into the plug hole... nothing. After hauling it home I stuck in a new NGK (BP6ES) ... one kick it pop'd off and ran. I shut it off... retutrned later that evening to chase my buddy (78 SR ) One feeble " poop " .. then nothing. Gas in the hole.. nothing.. starter fluild.. nothing... bright blue spark. Has good compression , I can't kick it without the lever.. This morning... again nothing. Not even a pop.. still has bright blue spark.. ideas..?.. thanks for your attention, Mike MN
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Post by wotavidone on Aug 12, 2008 22:42:33 GMT -5
When this happens to me - very rarely coz my baby is always good to me  . (By the way, you have developed a pet name for her, and you do say hello, how is my baby today before you try and start it, don't you? They need to know they are loved and valued before they want to give back to the relationship.) What I do, if it gets a hissy fit and won't start, is hold in the decompression lever and give it three good full kicks to clean it out. Then try and start it. This was shown to me by a guy who bought one new back in the day. His thought was that sometimes you get things wrong, for example put the choke on when it doesn't need it, kick it with no throttle when it was just warm enough for the hotstart button, etc, and maybe flood it or whatever. So kicking it over a few times with the decompressor held on, which holds the exhaust valve open and prevents any air/fuel mix being drawn in from the carby, clears out unburnt fuel, lingering exhaust gases or whatever and gives you a nice clean starting point. Maybe try that and see how you go. Mick |
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Post by StewRoss on Aug 13, 2008 2:34:06 GMT -5
Just out of interest...it hasn't run out of fuel at the tap has it? As it's a vacuum operated tap you'd need to turn it to PRI if it has to allow the fuel to flow through...ignore this if you've already thought of this. A 6 is a little warm as a plug as well...especially out in the heat of Summer...I'd use a 7... Possibly you could have a stuck valve as well...happens occasionally I've found...(but I've not seen it now for a long time). Check to see that they both move fully through...has it got plenty of compression? SR  |
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Post by motormike on Aug 13, 2008 11:54:29 GMT -5
This morning I attemped to start the bike. Nothing. So I pulled the headlight out... Kick.. Bang.. runs like normal. Replaced the headlight... kick... bang...runs... ? .... I know on cars if the battery is low.. they won't fire. The battery in the SR is new this year... no corrision .. no known chargeing issues. Later I'll check it out running with my little volt-ohm meter. Perhaps I'll find a weather proof rolling thumb switch and wire it into the headlight so it doesn't come on until after it starts... ?... I replaced the " 6 " plug.. that what was in it when I got the bike. The PO said that's what he was told to use because of the cam and 540 piston... ideas on that subject would be welcomed. Thanks, Mike MN
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Post by solo2racr on Aug 13, 2008 13:02:43 GMT -5
I wouldn't use the "6" plug even more with the 540 and the cam. Reason being, bigger bang=more heat. NGK plugs are lower number for hotter plug.
The battery hasn't anything to do with the ign. sys. Sounds more like a bad wire or connector.
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Post by motormike on Aug 13, 2008 13:14:34 GMT -5
So I should bump it to a 7..? .. my service book I got off Evil Buy isn't here yet.. thanks, Mike MN
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Post by solo2racr on Aug 13, 2008 14:14:35 GMT -5
So I should bump it to a 7..? Yes. I have even ran an 8 |
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Post by motormike on Aug 13, 2008 15:25:09 GMT -5
Got 8's ! ! ... that's what I use with my Xs units.. thanks. Mike, MN
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Post by StewRoss on Aug 14, 2008 2:24:38 GMT -5
Hi, 8 plugs can be fine if you're on it all the time (BP8ES). Riding the SRs hard I used to routinely go straight to them. I even tried 9s for a while but changed back. However, I found that in some of my engines they will carbon up after a while, especially with 'around town' riding...on those engines once I went back to 7s and the problem disappeared. Depends how you ride...with 6s I'd be a little concerned about holeing the piston in hot weather. In really cold weather they probably would be fine. SR |
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Post by solo2racr on Aug 14, 2008 11:17:51 GMT -5
I agree with SR. When I said "I have even ran an 8" I probbably should have said more. While it is true that I have used NGK 8 plugs, I had the same problems with in-town motoring. For varied street riding, the 7 is the best choice. On the other hand, I would rather change a fouled 8 plug than replace a holed piston from running a 6 plug.  |
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Post by motormike on Aug 14, 2008 16:08:34 GMT -5
Thanks.... I returned to the bike ...this morning... opened the headlight bucket up... pulled all of the connections... no issues... no corrsion.. no burnt areas... another attemp to start it.. same results. Spark, no fire. So I removed the voltage regulator.... The terminals were dirty.. that white dust .... so I cleaned them .. got the copper color back.. and sparyed the terminals blocks with the only thing at hand... carb cleaner... installed the unit..one kick.. pop'd and ran.... turned it off...repeated 3 times.. ran... so I hooked up the volt meter... 14 volts... steady.... plug'd in the headlight...... 14 volts.. highbeam... 14 volts. ... ? .... I saw on Evil Buy a guy is selling a aftermarker direct fit CDI unit.. $165.00... had anyone used one... I'm think'n I'd get one for a spare.... I'll also keep an eye out for a voltage regulator... again thanks for your help. After I get back from Omaha this weekend I'll take the fun bike out for a spin... Mike, MN
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Post by motormike on Sept 7, 2008 13:22:51 GMT -5
Aaaaaaaaaagh.... have'n had time to play with the SR since last post... I did fire it up and rip around the block a week ago.. Today.. fired right up... one kick... great !.. over a couple of blocks... a buddy is pull'n the rear fenders off his 53 Chev Pik-m-up .. told my share of lies... 15 minutes later.. it fired up.. off to the gas station.. 10 blocks.. fuel.. won't start... ( insert various swear words here ________ ) pushed it 5 blocks... made another attemp and it started.. rode home 18 miles....got downstairs.. wont' start... for the pass 2 hrs I've went downstairs every 5 minutes.... nothing.. not even a snort.. a feeble pop.... I got a used volt-reg... if it fires up in a couple of days I'll ride over to the garage and swap them... don't know if that's the problem... Mike, MN
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cliff
Junior Member
Posts: 42
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Post by cliff on Oct 2, 2008 12:57:18 GMT -5
Hi Mike, Sounds like the symptoms of the stator getting ready to go to heaven. There are ohm measurements for the stator all over this sight to be sure that is the problem. REbuild from these guys is $200 + shipping. www.rmstator.com/en/index.phpEven if that is not the problem I would have it re-wound anyway because it seems they all eventually go out being a 30 yr old bike. I had two go out in the same week. Cliff |
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Post by soonerfan on Oct 2, 2008 15:57:02 GMT -5
Boy....all this makes me wonder about my troubles since I put my SR back together. I have a heck of a time getting mine to fire right up. My friend that helped me with the project claims that the sequence is: 2 throttle squirts, full choke, 2 hard kicks, and it's all go on the 3rd kick. Not mine. I have found that the kick start lever must have resistance at 12 o'clock, or the very top to get a pop. Sometimes I kick the hell out of the thing, maybe 10 or 12 times before I get anything promising. This is the original carb, newly rebuilt and tuned with an EGA. When it does start, and is warm, she idles like a sewing machine. New plug. So what gives? Any change in the preceding sequence? I don't touch the throttle until it fires up. Any help anybody?
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Post by miker on Oct 2, 2008 16:59:16 GMT -5
Just a thought. Mine's been a bit weird this year, and one of the things that really helps is to "tickle" the carb when cold starting. Or to use non-Brit terms, I put the petcock over to prime and fill the float chamber before I kick it. Starts like a dream. I can see the gas running thru my filter so I know it's filling.
But... I got no idea where all the gas that *was* in the float bowl goes. I mean, it was full when I shut it off last... where'd it go? Nothing under the bike, no leaks, no obvious smell, oil looks ok...
miker
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. (By the way, you have developed a pet name for her, and you do say hello, how is my baby today before you try and start it, don't you? They need to know they are loved and valued before they want to give back to the relationship.) 
