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Author Topic: Help me find spark on my SR500  (Read 2723 times)

Offline Sonreir

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Re: Help me find spark on my SR500
« Reply #70 on: May 19, 2019, 16:13:05 »
What was the problem in the end?
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Offline scott s

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Re: Help me find spark on my SR500
« Reply #71 on: May 19, 2019, 18:31:07 »
What was the problem in the end?


 Well, the stator was rewound by Rick's but they used the wrong size wire and they wound the low speed pickup incorrectly.  Twice.
 They had 3 shots at it. To their credit, they gave me a full refund.
 I sent the stator to Rex's and got spark on the first kick. Fiddled with the carb settings and got it to run today. I need some fuel line so I can hook up the tank.

 And I'm still having some issues with the LH control. I think the contacts are bad. Sort of a known issue on these bikes.

 I saw a thread on the SR500 forum and he had the same issue I had; everything tested good but no spark. He had his "good" stator rewound and got spark. Same thing here. The stator tested good but it wasn't.

Offline wozza

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Re: Help me find spark on my SR500
« Reply #72 on: May 19, 2019, 20:45:03 »
Yay!!! great news 

Offline scott s

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Re: Help me find spark on my SR500
« Reply #73 on: May 20, 2019, 15:43:47 »
Well, I've put about 5 miles on her riding around the neighborhood. When she runs, she runs great. Falls into a nice idle (~1100 RPM), pulls pretty clean. Seems to really kick in over 3K RPM, probably when the pumper carb gives it a little extra juice. No real popping or backfiring anywhere; just a minor "chuff, chuff" on decel. Might just be the nature of the exhaust. The plug looks darn near perfect.

But HOLY HELL can she be a bitch to get started!! I kicked until I thought I was gonna pass out this afternoon.

I have the mixture screw set between 1.5 and 1.75 turns out (TM36-68 pumper carb). I started at 1.75 turns and went out, but that made the idle sluggish. Going in towards 1.5 turns cleaned up the idle and maybe helped with the "chuff, chuff" on decel.

When I installed the stator, I just set it in the center of the slots on the backing plate. Is there such a thing as "setting timing" on the CDI model? Maybe adjusting the stator position would help starting?
I've read where people with new coil, CDI and stator experience 1-2 kick starting. Something is obviously not quite dialed in on mine just yet. What would you check next?

I base lined the carb slide per some instructions member ASE-79 gave me. I did experiment with the idle screw (slide position) and, to be honest, I'm not sure where it is at now. You can't really bottom it out and start over without seeing the slide. But the fact that it idles darn near perfect when running makes me think it's OK.

Offline scott s

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Re: Help me find spark on my SR500
« Reply #74 on: May 20, 2019, 15:47:48 »
And since everybody likes pics:




Offline Sonreir

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Re: Help me find spark on my SR500
« Reply #75 on: May 20, 2019, 15:54:59 »
<3
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline CrabsAndCylinders

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Re: Help me find spark on my SR500
« Reply #76 on: May 22, 2019, 15:54:16 »
My SR500 has a big bore kit (540 cc), bigger carb and the battery has been eliminated.  It is the most difficult bike to start that I have ever experienced, worse than a 1969 kickstart Sportster that had a big bore kit and cam.  I have found that if it doesn't start after a few kicks then it's best to wait 5 minutes and then start over.  Once started though, all is forgotten, a big single is sweet to ride.
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ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650