Author Topic: '06 super 9 lc dies driving down the road  (Read 2836 times)

reedII

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'06 super 9 lc dies driving down the road
« on: October 04, 2013, 04:49:39 AM »
I was coming home tonight whenever my bike simply dies on me. It ran great then all of a sudden, it started losing power, then pretty much bogged out and died. I pushed it up a hill on the side of the 4 lane, then rode it down to a parking lot where i started the diagnostics. I have done all the mechanic work myself including aftermarket exhaust, hp coil wire, iridium plug, carb jet kit, torque springs, clutch springs, roller weights, brakes, de-restricting sleeve, belt, installed night time parking lights in the factory brake light housing that look flawlessly factory. It was running close to 60 on the flats at about 10.5k rpm, awesome!! Till now. I dont know what is wrong but am leaning toward the worst end, as in a bent valve, broken spring, something. I would appreciate any advice, ideas, fixes, etc. I love my Super 9 scoot, and use it daily as primary source of transpo to and from school, work, and anywhere else a feller needs to go. Much Thanks in advance.

I do have fire from the plug, I have fuel, it splashes out of carb whenever air filter is off and my hand is choking it. I am not sure but thanks.

Vivo

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Re: '06 super 9 lc dies driving down the road
« Reply #1 on: October 04, 2013, 08:36:14 AM »
If you have fire and gas... I would guess the problem is mechanical...

reedII

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Re: '06 super 9 lc dies driving down the road
« Reply #2 on: October 04, 2013, 06:11:48 PM »
mechanical as in what, the valves, rod, could a fuse be bad and still be firing but not letting it crank?

Vivo

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Re: '06 super 9 lc dies driving down the road
« Reply #3 on: October 05, 2013, 01:16:16 AM »
mechanical as in what, the valves, rod, could a fuse be bad and still be firing but not letting it crank?

Lots of stuff in there...a diagnosis is needed...

Areomyst

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Re: '06 super 9 lc dies driving down the road
« Reply #4 on: October 05, 2013, 04:27:14 AM »
Any time you have a no-start situation, it is best to "get the facts".  You need facts, not speculation or guesses in order to accurately get to the bottom of your issue.

Your engine needs proper charge (fuel, oil, air) being supplied in order to run, along with sufficient compression, and ignition.  Of course, it all has to happen at the right time as well.  You'll need to check for spark, compression and fuel.  It sounds like you have already checked spark, but even though you are getting fuel - are you sure there's no water in there, and no trash in the carburetor?  Have you hooked up a good compression gauge and gotten a reading?

You mentioned "bent valve" in your previous post... Our 2-stroke Super 9 engines do not have valves like you would find in your car, but they do have reed valves (which break and fray, they don't bend and stay stuck in a bent position like metal 4-stroke valves might).  I suppose you could check that if you are so inclined. Be careful about the gaskets... might want to have extras on hand before you take it apart if you suspect a broken reed.

If fuel and spark are okay, you may want to remove your exhaust, and look up into the port.  From here, you can actually see the piston.  You can't see all of it, of course, since you're only looking through the exhaust port, but you can see enough to tell if there are scratches or unacceptable wear on the piston.  You can also see the boost port, and secondary transfers though the exhaust port.  I'd get a compression check while you're at it.  One with a real number attached - not the "It blew my thumb off", or "it didn't" method. :)

I consider it rare to have an ignition timing issue on a scooters, as the ignition timings are fixed and the flywheel keys really don't shear in normal service.  That said, I think that if you have spark, you really shouldn't have to worry about the ignition timing - but I'd like to mention that just this week I had an air cooled Super 9 come into the shop that had a bad CDI... It still had spark, but it was firing at the wrong time, causing a no-start situation.  On occasion it would even backfire really bad when trying to start.

On the note of CDI issues, you will want to make sure that you have a well charged battery.  With your liquid cooled Super 9, you have to have a bit of power to run the DC powered CDI.  It will not run well without a fully charged battery.

If you take this, and the other advice people have given you into good consideration, I think you'll be able to give us some good feedback.   You should certainly be able to get to the bottom of the issue. :)

~Josh
« Last Edit: October 05, 2013, 04:28:53 AM by Areomyst »
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reedII

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Re: '06 super 9 lc dies driving down the road
« Reply #5 on: October 05, 2013, 05:13:41 AM »
wow, now that is what i call help!! Thank you, Areomyst. I had been listening to some advice that i knew wasnt most valid. I have been doing the research, but once again, i have found the best info right here. I will definitely check the reed valve, and probably check on a new CDI. Would the reed valve be making any noise before towards the "end of its time?" by chance. These frigging scoots are awesome and i would hate to let it go. Thanks again, i will check tomorrow and let all know.

Rage

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Re: '06 super 9 lc dies driving down the road
« Reply #6 on: October 05, 2013, 11:12:22 PM »
Im curious as to the compression. Maybe u cracked the piston or ring? You have a BBK on her? Didnt see that on ur mod list, but cant imagine how u get a stock scoot to 10,500 rpm and 60mph on flats.

reedII

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Re: '06 super 9 lc dies driving down the road
« Reply #7 on: October 06, 2013, 01:08:37 AM »
well feller's, I think I found the culprit. i took the carb and intake off to look at the reed valves they seem to be fine, no fraying or cracking or anything that looks to be in bad shape. So i took the cylinder and head off and removed the piston to measure the wear, and it was missing the top ring. I didnt see any bits down in the crank case, but on the side of the piston it was some kind of heat fused into the piston. The cylinder didnt show any signs of something traumatic happening oddly enough. So, i used the micrometer to check the go-nogo specs to see how worn it was, and it is right on the border line of needing replacement. Actually, the bike was hitting around 12.5k but wasnt quite to 60... closer to 56 (on GPS.) I believe I will go up to the 70cc bbk.

To my knowledge, it is all stock as far as the cylinder and crank, but I have put 1500k clutch springs, different variator ramp, have went up and down in roller/slider weights, changed to a 1500 torque spring (which im thinking of trying the 2k), sigma 6 carb kit w/ 100 mj, and a hp coil wire, put a cold-air intake filter with a "manufactured" air scoop fabricated, aftermarket exhaust that i hve nearly gutted, and thats bout all i can think of now, although im sure my wife will say i have enough hours in it to fabricate an entire fleet of scooters. I run high test petro and royal purple 2t performance oil.

I do say the bbk isnt on it to the best of my knowledge, but i do have the cylinder off so if there are any known markers or numbers to verify either size, i would love to know. I too am amazed by this little beast.

reedII

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Re: '06 super 9 lc dies driving down the road
« Reply #8 on: October 08, 2013, 06:15:51 AM »
Alrighty then, it was a 49cc. Found it stamped on the cylinder, duh. :) I am going back with the bbk, and was wondering if the aftermarket technigas exhaust and the 100 main jet in the stock carb will sufficient for cooling and ease the damage on the engine? I would sure appreciate the info.

And Rage, Im not sure how it was doing it, it just did. I ran mulitple variations of weights, put the carb kit on, and the rest of the mods, and it was ridiculous. I was never the guy on the scooter holding a line of traffic back for miles. I live in the mtns of NC, and my whole intent behind trying different things was to be able to climb these mountains around here. It was a feat but the super9 pulls hills like a beast, and the tranny almost switches gears like a manual, but an automatic.

Thanks Areo, Rage, Vivo, much thanks. This place is great and an absolute ocean of information.

Vivo

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Re: '06 super 9 lc dies driving down the road
« Reply #9 on: October 08, 2013, 07:17:27 AM »
Technigas Next R or Technigas Tek.... very good performers and cheap...  ;)

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