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Post by jhobe6678 on Sept 5, 2014 8:34:02 GMT -5
The GF just reported to me that the scoot was "running rough", that it sounded more like a chainsaw than a weed eater. I won't be able to look at it till later tonight so I thought I'd ask you guys? I haven't done anything to it over the week except today she put gas in it and it was 93 octane and not the 89 that I originally filled it up with. Wondering if that would have a difference? Better or worse? Before I run the entire tank of 93. The sticker on the scooter said to use 91 or higher so I figured why not?
Again, this is speculation till I get home to check for myself.
Aaannnnddd GO!
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Post by peabrain on Sept 5, 2014 9:40:03 GMT -5
i don't think the gas is you problem unless its somehow bad. higher octane should make cleaner burn i use 95 octane (Denmark) on my previous scoots to no ill effect only my current one that might be cursed other story though
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Post by jhobe6678 on Sept 5, 2014 9:53:58 GMT -5
i don't think the gas is you problem unless its somehow bad. higher octane should make cleaner burn i use 95 octane (Denmark) on my previous scoots to no ill effect only my current one that might be cursed other story though Yeah, I don't know yet. I have to hear for myself I guess. I know I'm only going to run high octane in it from now on. I just thought I'd ask if anyone else could relate to what she said.
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Post by 2TDave on Sept 5, 2014 10:14:56 GMT -5
Sounds more like an exhaust leak issue.
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Post by usmcdoc on Sept 5, 2014 13:47:49 GMT -5
One of THE biggest misconceptions about high octane fuel! Folks believe higher octane = more power cause it burns faster. In actuality it burns slower as to prevent detonation in high compression engines. In my Scoots it actually decreases performance.. Folks say.. "But my manual says to use 91 octane or better" Here is where the confusion comes in.. Ya see..in European and Asian countries they use a different formula. They use RON only..which translates 91 octane in their gas to 87 octane in the U.S. where we use the (RON+MON)/2 formula. READ the little decal on your local gas station pump...it even says octane is based on (RON+MON)/2.. Here is a good link..a good read that should clear up the confusion on octane ratings that are posted so often on here. I have a 2003 Tank Urban Sporty 50 that has seen NOTHING but 87 for all of it's 21,200 miles so far. Whole engine is all original still...but is about due for rings..which is not bad for that much mileage. ok..the link..read and heed.. Interesting..you be happy ya read it.. www.pencilgeek.org/2009/05/oc...nversions.html
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Post by jhobe6678 on Sept 6, 2014 14:11:06 GMT -5
UPDATE 1:
So I've had a chance to look at it myself. At low RPM it sounds like it's knocking, but how does a 2t knock with no valves I figured? I took the CVT off since I had the new belt and did some cleaning while I was there. I removed the old belt and variator completely, ran the engine and heard the noise. It doesn't sound "bad" per say, it just sounds different. It seems to quiet down a tad when it warms up. Reving it up and it goes, the engine seems like it has no problem gaining RPM but I'm afraid to open it up right now anyways.
So I put the new belt on, cleaned up and re-installed the variator. The new belt seems more stable to start so yay for that. My other suspicion is a blown/bad reed valve so I took the air filter box apart to see if there was any back fire/blow by. Nope, seems fine.
I went to the other side of the scoot to see if it sounded louder there, it sort of does. But when I had the CTV cover off, it sounded like it was coming right from where the shaft is. But I can't tell if it's in the engine or coming from under? (Exhaust leak?)
I put it all back together and took the bucket out from under the seat, gonna change to the right fuel filter so might as well, right? No, the lines didn't come in yet. THANKS USPS!!!! *growls*
It's all back together and the engine doesn't seem like something is "wrong" per say, when I rev it up the engine goes to sounding more normal, it's just at idle under 2,000 rpm it sounds "clanky".
There's smoke coming from the back but it isn't quite as blue, so maybe my oil mix is shot? I'm thinking of doing pre-mix anyways and getting rid of the oil system all together really.
I dunno, I'm afraid to drive it because I'd hate to break it under pressure, but the GF rode it yesterday just fine. Odd.
2tDave, PM me if you're available tomorrow and I'll give you my number if you'd like?
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Post by jhobe6678 on Sept 6, 2014 14:37:50 GMT -5
Update 1:1: Just inspected the reed valves and they are perfect, no nicks in them and perfectly flat...
I'm going to drain the gas from the tank, put the new filter on and put in the gas this time pre-mixed.
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Post by jhobe6678 on Sept 6, 2014 16:00:22 GMT -5
I drained the gas, unmounted the oil tank and disconnected it, put the new filter on while being able to still use the fuel line I put in last weekend. I put the reed valves back on, put it all back together, re-connected the wire to the oil tank and now I can't get it to turn over? I checked the plug and the tip seems clean. I cleaned it anyways and checked the gap. Still not turning over. I pulled the plug out, hooked it up to the wire but have no spark now? I removed and reinstalled the reed valves and now I think I stripped one of the holes/screws holding it in. So yay for that too.
Still not running. It turns over with the starter, but does not actually start. Checked Intake, fine. I hear put put coming from the exhaust, I even noticed when I pull on the throttle the put put tone seems to change too. I primed the lines and removed all the air from them even. I know there has to be gas coming in because the plug seems when when I pulled it out.
Did I just kill the scoot?
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Post by 2TDave on Sept 6, 2014 16:01:39 GMT -5
I think the rollers move around at a low idle making a noise. I don't know that's what it is but I hear it in mine and others. Not sure what I'm doing tomorrow, depends on the weather. Nasty ass storms here today. Got a couple things until around 1pm. I'll send you a pm if I can take a ride or you want to ride up.
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Post by jhobe6678 on Sept 6, 2014 16:03:59 GMT -5
I think the rollers move around at a low idle making a noise. I don't know that's what it is but I hear it in mine and others. Not sure what I'm doing tomorrow, depends on the weather. Nasty ass storms here today. Got a couple things until around 1pm. I'll send you a pm if I can take a ride or you want to ride up. I sent you a PM. I can drive the car up but the scoot is DOA at the moment on my patio. Sort of covered but yeah, the weather is crap today. But I'm thankful for it since it gave me a break to spend a few hours BREAKING the damn thing lol. Ugh. A fuel filter change and belt is all I wanted. PS. The noise happens even with the variator off. So it's definitely not that for sure.
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Post by 2TDave on Sept 6, 2014 16:09:07 GMT -5
Be careful running it w/o the variator or better yet don't unless your removing the starter clutch. You checked spark with the plug in the boot grounded to the frame and kill switch on?
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Post by 2TDave on Sept 6, 2014 16:11:28 GMT -5
If it's nice tomorrow I'll try and come down early afternoon.
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Post by jhobe6678 on Sept 6, 2014 16:17:03 GMT -5
If it's nice tomorrow I'll try and come down early afternoon. gah... Maybe I should try and ground the plug and see again, not sure if I did that right. I didn't remove the stator. Everything is all back together now. It... just... wont.... START! *sobs* And my GF needs it this week. Well at least I can take her to work tomorrow and pick her up. *sigh*
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Post by 2TDave on Sept 6, 2014 16:21:33 GMT -5
Not the stator. The starter clutch is behind the variator. Check for spark again. If you don't have any retrace your steps and confirm you didn't knock a wire loose from the coil or anywhere else.
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Post by jhobe6678 on Sept 6, 2014 16:29:55 GMT -5
Not the stator. The starter clutch is behind the variator. Check for spark again. If you don't have any retrace your steps and confirm you didn't knock a wire loose from the coil or anywhere else. I was extra careful with the starter clutch/variator. It started before I got to the fuel line, I made sure it ran when I put the CVT back together. So that's not an issue. I just re-checked for spark, it's good. I grounded the plug this time, like an idiot I didn't think of that. Whoops. Still nothing though. I'm letting the battery charge a bit and giving the starter a rest. I'm wondering if I messed up the fuel petcock somehow by disconnecting the fuel line and letting air in maybe? I didn't disconnect any lines from the carb itself so I'm hoping the problem stopped there and is easily fixed. Otherwise everything else seems to be in working order.
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