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Post by stellarfoxy on Jul 6, 2015 16:53:12 GMT -5
ok so I think I've solved it. I installed the 30mm pumper carb and let it warm up, one I dialed in the screws it seemed to want to restart. I'll test it when it's a bit cooler this evening and report back.
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Post by geh3333 on Jul 6, 2015 19:38:23 GMT -5
ok so I think I've solved it. I installed the 30mm pumper carb and let it warm up, one I dialed in the screws it seemed to want to restart. I'll test it when it's a bit cooler this evening and report back. That's what I like to see !! A 30mm carb. I'm a big fan of bigger carbs . it seems as if members are finally warming up the the idea. Over the past 2 years or so we have had many try the 28-30mm carb with great results. I have a 32mm pumper and my scoot is pretty darn fast . I hope it works out for you. This will be a first . someone's scoot not working until a 30mm is slapped in  . they usually run fine with out a bigger carb, just better with one . your scoot must be bored with the smaller carb, lol |
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Post by stellarfoxy on Jul 6, 2015 23:02:27 GMT -5
well I drove it hard to the store a mile or more so away, uphill downhill stop lights etc., it got plenty warm and crankrd when I left the store (5 minutes tops?) then I got back and drove it around the neighborhood, it stalled again at my driveway and was really hard to start again but eventually did. I'm wondering if my orange adjustable cdi is set wrong now. might pop in the stock one and see tomorrow. but progress!! it wouldn't start at the store with the 24 or after a trip around the neighborhood. I'll fiddle with the carb and swap the cdi and report.
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Post by stellarfoxy on Jul 7, 2015 13:37:39 GMT -5
I'm getting to a point where I'm running out of things to fix. it wasn't hard to start this morning, but did take about 10 seconds, then it kept wanting to cut off, especially when I gave it throttle. after a couple of minutes it idled ok. I messed with the cdi, turning it to the left (counterclockwise) made it idle higher, to the right idle lower. I'm assuming left is advance? I dunno I may pop the oem back on to see if it's right. after messing with that and the idle screws, I'd turn it off and it was hesitant to start again, then after about a half hour of messing it just shut off. so i said some unholy things at it and we went our separate ways. it didn't go anywhere actually, it wouldn't start. I went my own way, which is right here apparently.
there was some light smoke coming out of the pcv breather when it was idling at one point. probably normal right? I noticed there is a couple small chunks missing from my shroud near the spark plug, could that be allowing it to get too hot and not want to crank?
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Post by stellarfoxy on Jul 8, 2015 18:41:32 GMT -5
something went wrong. oil is all over the ground underneath it. won't barely start at all now. when it does it idles bad.
ugghhhhhh
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Post by geh3333 on Jul 8, 2015 18:46:38 GMT -5
something went wrong. oil is all over the ground underneath it. won't barely start at all now. when it does it idles bad. ugghhhhhh let us know where the oil is coming from . |
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Post by stellarfoxy on Jul 9, 2015 13:00:35 GMT -5
looks like around the starter (fresh o-ring) all the way down the back and underside of the main crank case separation line, and around a couple external screws near the drain plug. do these engines vibrate themselves loose? it only leaks after I turn it off, seems to hold it's oil fine until I kill it then it drips like crazy, yesterday I watched it lose a couple oz on the ground after a run
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Post by geh3333 on Jul 9, 2015 16:34:41 GMT -5
looks like around the starter (fresh o-ring) all the way down the back and underside of the main crank case separation line, and around a couple external screws near the drain plug. do these engines vibrate themselves loose? it only leaks after I turn it off, seems to hold it's oil fine until I kill it then it drips like crazy, yesterday I watched it lose a couple oz on the ground after a run It sounds to me that when your valve lash was set , the piston may not have been at tdc. If that was the case , this means the valves were not opening at the right time and when u ou messed with the cdi timing , everything got worse. You could have had massive crank case pressure causing the case gaskets to leak. I would also recheck your cam timing. All of this points to a timing / valve / firing issue. |
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Post by stellarfoxy on Jul 9, 2015 19:59:28 GMT -5
ok. would the crank case pressure not be relieved by the pcv though? when I adjust valve lash, I usually turn the cam to where one valve is entirely open so that the other one is definitely closed, then the opposite. I figured that way it's definitely correct, as there's no way the cam lobe is interfering with the adjustment. is that incorrect?
also does that explain why it holds it's oil until right after it's not running? everything you're saying makes sense about excessive pressure, but wouldn't it be spewing oil while it was running also?
since you've mentioned pressure I'm wondering if some sealant got loose and is clogging one of the oil passages.
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Post by cyborg on Jul 9, 2015 20:11:35 GMT -5
Both valves should be closed on the compression stroke at the top dead center,,,,both of the follower ends of the rocker arms will be on the "base circle "of the cam so it will be the "lowest" part of the cam then do the adjustment "dead cold" 4-6 hours minimum cool down preferably overnight,,, then the hard hot starts go away,,,,happy happy
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Post by stellarfoxy on Jul 9, 2015 21:06:11 GMT -5
wait I've been through this before actually. the original crank's timing gear was slightly off, I replaced it and everything was much better. it appears my reassembly was less than par. but I'm sure my tdc lines up with the lines on the cam and variator
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Post by stellarfoxy on Jul 9, 2015 21:08:19 GMT -5
ok I'll try adjusting the valves again with it at the compression cycle tdc
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Post by cyborg on Jul 9, 2015 21:17:53 GMT -5
Cold or hot mine starts with less than 2 revolutions,,,and yours should be the same,,,,the engine should be eager to lite,,,
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Post by stellarfoxy on Jul 9, 2015 23:31:20 GMT -5
it was at one point, with the 24mm carb, but it wouldn't start after it got warm and it ran lean.
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Post by geh3333 on Jul 9, 2015 23:36:06 GMT -5
Also make sure the cam holes run parallel to the head . it just really sounds like a timing or valve issue to me.
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