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Post by truebluethecat on Aug 10, 2015 19:35:31 GMT -5
If after you replace that hose you still have the problem my question would be this, when its not starting are you getting proper connection through the ignition switch, one thing to try is look at you fuel gauge. When no key turned in the ignition it should be at E, turn the key on and it should raise to you fuel level, now giggle the key lightly. Just light taps should tell you. If you see the needle bounce up and down then your looseing connection. I had that problem in the past its not always the first thing you think to check. If that's the case get some electrical contact cleaner (O'Reillys has it) stick the straw past the little cover in the key hole and give a little sprits or two (don't flood it) then quickly put your key in and turn it to on and off several times, solved it for me on my last scooter and my old motorcycle. Only other thing if after you try everything else is maybe the coil is going out.
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Post by truebluethecat on Aug 10, 2015 19:22:21 GMT -5
Sorry for not getting back sooner, been busy with work lol. So I had a  jet in there and she was bogging a bit while trolling around the culdesac. Stopped and took a whiff of the exhaust and smelled a bit gassy. So swapped to the  jet I have and tuned the air flow screw a bit and now she's running like a champ. Do notice the higher compression, starter not really liking it so just kick starting her when cold for now. Already got the head ordered, actually just ordered another bbk with just the piston, cylinder, head and gaskets comes out to be about the same as the head and gaskets by them self's except this way I get spare parts to boot lol. |
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Post by truebluethecat on Aug 8, 2015 21:40:08 GMT -5
Well swapped heads. She's running wonderful now. A bit rich but that's what tuneing is for haha
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Post by truebluethecat on Aug 8, 2015 14:15:45 GMT -5
Yeah that's what I'm thinking. If using the old 50cc head is safe then I'll use that in the meantime. A loss in performanc till I get a new head is acceptable to me. The real question is though is it safe? The old head is flat mostly till you get to the valves. The new one is slightly dished just large enough to see where the piston should in theory go. While I don't see how the piston could hit it, I'd still prefer a more experienced opinion ha-ha. Also by safe I mean any long term damage that could happen doing this?
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Post by truebluethecat on Aug 8, 2015 0:59:15 GMT -5
Yeah I was very careful with the timing its dead on. I don't think it's the cam there was at least a quarter inch of play between the top of the valve and the rocker arm before I tapped on the valve and it popped back up. Unless your saying the cam is pushing the valve too far in? And yeah I'm going to check on what it'll take to get a new one in the meantime
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Post by truebluethecat on Aug 8, 2015 0:30:40 GMT -5
Just doing some thinking. The sticking valve I'm pretty sure means its likely bent. Now I haven't compared the two physically yet, been googling lol. But dose any one know if the 50cc head is any different from the 100cc? If so what about the valves them self. Thinking if the heads are the same then just swap back to the old one. Failing that if the valves are the same then swap those?
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Post by truebluethecat on Aug 7, 2015 22:36:20 GMT -5
Well after adjusting the torque. Putting the new air filter on and adjusting the needle she still died BUT I believe I have found the problem, actually I'm 99% sure its the problem. The intake valve is getting stuck. I just pulled the cover off to check the rockers and noticed that it was already at tdc and the valve was still down and rocker hanging in air. Gave it a couple small taps and it popped back up That explains the feeling of no compression. Any suggestions?
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Post by truebluethecat on Aug 7, 2015 14:28:47 GMT -5
Ok sounds like my little rc car air filter should work then. It's essentially a micro uni filter. About a inch and a half tall and about as big around as a quarter.
I did not think to torque the bolts so you may have actually pinned it. I had not thought about it but what you say makes sense. I'll do that tonight first thing. I'll have to look those numbers up.
My cdi and coil are new. Came with the kit.
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Post by truebluethecat on Aug 7, 2015 12:36:17 GMT -5
Oh and what did you do with the cam ventilation hose? Mine hose to the air box. Dose it need the air pulled in or is it fine being zipped to the frame? I was thinking if that's the case I'd put a small air filter on it form a old gas rc car I had.
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Post by truebluethecat on Aug 7, 2015 12:17:51 GMT -5
Ok so I'll swap out the air filter. The one that came with the kit is like a foam uni filter. And just to clarify the needle you talking about is the one in the diaphragm? (Fist time adjusting one of these carbs, I'm more experienced with lawn mowers and weedeaters/chainsaws a bit different lol)
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Post by truebluethecat on Aug 7, 2015 10:20:53 GMT -5
I set the valves to .005 while cold. And I've adjusted the idle but it didn't seem to die at idle, its dieing out while riding. Maybe to little air flow? I'm using stock filter bix but have a cone like filter that came with the kit that I haven't installed yet
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Post by truebluethecat on Aug 7, 2015 1:30:43 GMT -5
In going to have to go with normal to. My old scoot did this as well. Spin the tire any direction and it free spun for a second or two then "thunk". I guess of there's no grinding sounds or hard metalic jumbleing (like sockets in a bag) and theres oil its probably fine.
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Post by truebluethecat on Aug 7, 2015 1:15:56 GMT -5
Ok so I did a 100cc bbk on a 139qmb. Everything mostly went well. Started fine and everything. Was letting her idle for 5 mins and talking to a neighbor at the same time when the scoot died. Turned around to look and found a nice puddle under her. Seems I tore a gasket during install and didn't notice. Any ways she didn't freez all looks good except the piston rings.... I think. The bottom rings (the two with the mesh between) look very nearly flush with the side of the piston. Now when I start her (yes replaced the gasket) she runs fine until she starts getting to temp (about 10 mins or so). The dies and won't start again for like 30 mins and during that time if I try to start her its as if the spark plug wasn't in. So what do you guys think? New rings? Or do you think there's another issue I'm over looking? I installed a new coil, cdi, rocker arms, a9 cam, exhaust, iridium spark plug and carb with a main jet. |
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Post by truebluethecat on Aug 7, 2015 0:54:04 GMT -5
I agree with jerryscript would just like to add look before taking apart. Locate the button and try wiggling it with a small flat head screw driver it could just be stuck. Happened on my last scoot.
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Post by truebluethecat on Aug 2, 2015 22:46:28 GMT -5
Ok cool. I know there's many options. One thing I'd like to do is switch over sliders instead of rollers. I just wanted an informed opinion on this to make sure that running off on this wouldn't cause catastrophic failure some where and destroy a bunch of stuff. And yeah I know 2t scoots are different than 4t scoots in many ways though the cvt on my old 2t was identical to this one.
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jet in there and she was bogging a bit while trolling around the culdesac. Stopped and took a whiff of the exhaust and smelled a bit gassy. So swapped to the 
jet I have and tuned the air flow screw a bit and now she's running like a champ. Do notice the higher compression, starter not really liking it so just kick starting her when cold for now. Already got the head ordered, actually just ordered another bbk with just the piston, cylinder, head and gaskets comes out to be about the same as the head and gaskets by them self's except this way I get spare parts to boot lol.