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Post by lostforawhile on Oct 21, 2017 17:20:56 GMT -5
Ok first it was an ignition issue, I had low stator charge coil volts, and a bad coil at the same time, after a mess with amazon, I finally got a stator, put it in, then discovered the pickup was faulty, no pickup voltage, so I put the old pickup back in, now I have pickup voltage, then I thought the yahmaha coil I put in was bad, so I went back to the stock one, it would run for a few seconds, then die, so I put the yahmaha coil back in, and it started right up, but it will only kick start, it won't crank fast enough on the electric start, I'm sure if it's a starter issue or not. it won't run unless I really turn up the idle speed, if I turn it down where it won't spin the rear wheel, it won't even crank. It's like the low speed circuits aren't working. I have taken this carb apart several times, it's clean inside, all the jets are clean, air will move through all the passages, but it won't run on the idle circuits. I have an 86 main, and 33 pilot, right now the needle is on the second notch from the the bottom, no vacuum leaks, it has gas in the bowl, the petcock works, it will run like a son of a bitch if I give it gas but won't run at normal idle speed
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Post by lostforawhile on Oct 21, 2017 17:37:35 GMT -5
on the CVK carbs with the mixture screw on the intake side, it's still two and a half turns out from fully seated right for a rough setting? and if you unscrew it it's richer?
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Rune 75
Scoot Enthusiast
Posts: 441
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Post by Rune 75 on Oct 21, 2017 17:50:57 GMT -5
on the CVK carbs with the mixture screw on the intake side, it's still two and a half turns out from fully seated right for a rough setting? and if you unscrew it it's richer? If you by intake side mean engine side (not airfilter side), then yes to both your questions.
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Post by lostforawhile on Oct 21, 2017 18:12:45 GMT -5
on the CVK carbs with the mixture screw on the intake side, it's still two and a half turns out from fully seated right for a rough setting? and if you unscrew it it's richer? If you by intake side mean engine side (not airfilter side), then yes to both your questions. yea I meant on the side going into the actual intake. This carb isn't even that old, it's always had premium non ethanol gas, always had a clean fuel filter. there is nothing that even looks like dirt on the inside, I've sprayed carb cleaner in every opening, took the needle and diaphragm out, cleaned the top, took the enricher off, sprayed it's orifice,it is functioning, the needle is not blocking the port. I have taken the jets out and cleaned them for the third time, took the float and needle out, checked them, it's just not running on the low speed side, this is a genuine Keihin 19mm CVK
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Post by lostforawhile on Oct 21, 2017 21:20:15 GMT -5
any insight? if i can get it running, it runs great, but no matter what I do, it won't run on the idle or slow circuits, just by opening the throttle with the idle screw past the point where the wheel is turning, as far as the electric start, I ordered a bendix, it's slowing down and speeding up and sometimes stopping, so it sounds like a bendix, not the motor, battery cranking voltage is fine. cables and solenoid are good
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Post by benji on Oct 21, 2017 21:22:59 GMT -5
I'd try going crazy rich on the pilot. Like 40-45. Just to see what happens.
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Post by lostforawhile on Oct 21, 2017 22:20:23 GMT -5
I'd try going crazy rich on the pilot. Like 40-45. Just to see what happens. whats odd is it ran fine on idle and low speed with the 33 before, the only thing I did different was change the main, which should only affect full throttle
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Post by benji on Oct 21, 2017 22:50:05 GMT -5
It's getting colder and wetter out, who knows what could cause it, but I'd throw a bigger pilot and see if it helps. If not, you can check off that idea. Only other idea I have is maybe an air leak.
Maybe check the valves? You gotta do that on 4t bikes, right? Maybe one came out of adjustment. I don't have experience with that, I'm a straight-up 2-smoker.
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Post by lostforawhile on Oct 21, 2017 23:31:51 GMT -5
I've already checked the valves, normally with the colder weather, you can adjust the idle mixture a little and make up for it. I already resealed the manifold, I made my own thicker gaskets to help seal it. Tomorrow I guess the carb comes off again, and I'll clean out the mixture passage to be sure
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Post by greginisn on Oct 22, 2017 1:16:55 GMT -5
Have you blasted the carb passages with a strand or two of copper wire and compressed air? You mentioned cleaning jets a time or two but those passages might be clogged.
Good luck, Greg
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Post by 190mech on Oct 22, 2017 7:11:41 GMT -5
Retarded timing will cause a sluggish/non idle condition,can the stator be clocked counter clockwise about a half a bolt hole??Ive also seen folks reclock the pickup coil only...
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Post by lostforawhile on Oct 22, 2017 10:44:32 GMT -5
Retarded timing will cause a sluggish/non idle condition,can the stator be clocked counter clockwise about a half a bolt hole??Ive also seen folks reclock the pickup coil only... it shouldn't matter, the timing is set by the magnet in the flywheel passing the pickup, and the flywheel is locked in place by the woodruff key, all the stator does is sit there under the flywheel and generate current,
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Post by 190mech on Oct 22, 2017 14:32:30 GMT -5
Its kinda like turning a distributor on an older car,,Yes,the rotating magnet is fixed to the crank,but if we move the stator plate the flywheel triggers the pulse coil at a different angle,,got it?
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Post by lostforawhile on Oct 22, 2017 14:55:28 GMT -5
Its kinda like turning a distributor on an older car,,Yes,the rotating magnet is fixed to the crank,but if we move the stator plate the flywheel triggers the pulse coil at a different angle,,got it? I understand what you are saying, but the pulse coil on these doesn't trigger the ignition, it charges the capacitor in the CDI, the rotating magnet passing the pickup is what generates a voltage that tells the CDI when to fire, you are thinking of a magneto type ignition, the reason the charge coil has so many windings, is it generates a higher voltage then the regular stator windings, the cdi steps that up even higher to charge the capacitor. these are also a wasted spark ignition, the plug fires on both the compression and exhaust stroke
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Post by lostforawhile on Oct 22, 2017 15:00:05 GMT -5
I've just gotten done seeing the paramedics, I tried to kick start this so many times, that I collapsed in this heat and humidity, I'm done with it, apparently I'm not intended to ride on two wheels, I should have known that after I was run over and broke my back the first time, it's going to sit in my backyard and rust, fuck it, I just went through the carb again, then I end up on the ground from pushing myself too far,
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