Clinician
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Post by dencho1992 on Feb 3, 2013 17:16:28 GMT -6
Ok guys so its up and running well now its not... but it was. so i replaced my head cyl and set the timing right and she started up fine rode her around for a while.
i noticed that there was some boggin in the throttle. when i got past like 1/4th it would stop then spurt hellla it seemed like the flow from the pilot jet to the main jet was not smooth.. i tried ajusting the fuel scew by turning it out quite a bit. this made the transition from the pilot to the main more smooth and when i opened up the throttle it actually ran fine which it didnt before i adjusted the fuel screw. so i think im not running lean anymore but u guys tell me.
so now this is where the problem stands. i got that thing sitting in a praking lot be couse it will not start. i tried to start it but it sounds like the starter jsut hangs after me trying to kick it over. click click click hrrrrrt..... thats how it goes when i push that starter button. kicker is broken for now so cant test it that way.
any thought on what i should do? mabye a bigger pilot and main jet? the only air box mod i did was take off the top part of the air box to allow more flow in. that air box had 3 layers it seemed to i took off the 2 outer layers to that only one air filter was protecting it.
the only jet mod i did was upgrade to a 125 main jet i believe any recommendations how to get my scoter running find again?
when i charge the batt tonihgt im going to head back there tomorrow and try adjusting the fuel screw to see if that works but the scooter seem to run the best when the fuel screw was turned almost all the way out. like i reved it a couple times and the fuel screw came out once hah.
also another question what do people mean when they say "turn it by 2 1/2 turns?" does that mean 2 ful rotations or 2, 1/8 turns?
by the way i live in washington its very cold here like now like usually 30-40 degrees right now.
thanks for reading guys ill buy whoever fixes my problem a beer!
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Clinician
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Post by dencho1992 on Feb 3, 2013 17:05:11 GMT -6
ok so i got it running and even rode it for a while turns out it was the valve timing set incorrectly haha silly me but i resetted it by making sure the piston up up and locking the lfywheel so its all good there but now there a fuel problem but i will start that in a new thread. thank you everyone for your help im learning alot and im gratful you guys helped me!
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Clinician
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Post by dencho1992 on Jan 30, 2013 12:39:16 GMT -6
thanks for your quick reply alleyoop I will do that when I get home later today. also this morning I noticed sparks coming from my starter when I tried to start the scoot it wasn't constant sparks but every now and then a spark would just come out of the starter is this normal? I don't have a volt meter to test the starter out is there anyway the starter would be the murderer here? also it gets hot after I try starting it for a while but that's to be expected since im just going to town on that start button. do you think the loss of compression would come from the intake manifold spacer being chipped? when I was changing the head I tried to pull off the spacer between the head and the intake manifold and it broke of a good third of the piece. al tho the hole of the spacer is still intact so I thought it would be fine since the part the broke off didn't look like it was holding any pressure in. one more thing im doing all this with the plastics off I also disconnected the front side headlights is there a chance there would be a lock on the scoot from starting up kinda how some scoots have a lock on the center stand? ok one moooore thing. if you know any diagrams of scooters I can use id really like to know what each doohickie in the scooter is im not fond of googling since usually all that pops up is scooter dealers hah I wish there was a texting hotline for this stuff  |
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Clinician
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Post by dencho1992 on Jan 30, 2013 5:26:38 GMT -6
this is how it pumps the fuel when I start it.
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Clinician
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Post by dencho1992 on Jan 30, 2013 5:24:14 GMT -6
Ok so I checked the spark on the valve cover there is spark. I check the fuel pump or petcock and it seems to be coming out at a steady stream its weak but steady. I also tried to put gas into the intake manifold vaccum tube and it did nothing when I started it I put a very little amount tho. also I forgot to mention that my intake spacer is chipped on the left side the chip does not reach the hole so I didn't think it really mattered but I have a new one coming soon in the mail. how much gas is too much gas in the intake manifold? I put at lease a teaspoon maybe.
I also cleaned the carb before these tests I took out each jet took a wire through all the side holes and main one followed by lots of carb cleaner.also u said maybe the tank outlet is clogged what is this?
also when ever I remove my sparkplug it seems that there is no oil on the tip its always dry? is this normal?
here is the fuel pump or petcock putting gas out when I suck on it. no matter how hard I suck it wont come out unless is stop sucking.
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Clinician
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Post by dencho1992 on Jan 29, 2013 14:57:58 GMT -6
thanks john how do I go about setting up a gravity feed to verify the problem on the petcock so I just use a gas container with the hose going from it? like a funnel? wouldn't that over flow the carb? also is there any sure way to test if the problem is with the auto choke besides using a multimeter or replacing the choke totally? thanks again for your quick response
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Clinician
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Post by dencho1992 on Jan 29, 2013 12:43:35 GMT -6
ok so it doesn't come at a flow it would if I was constantly sucking and not sucking like taking breathes at a certain interval but it should be coming out as I suck on it right? and how would I go about making a gravity fuel feed? what purpose does that have and would it be a long term solution? I have no problem replacing my petcock if that's the issue I just wanna be sure that that's the problem before I go about it.
ill post the video soon when iget home on how my petcock is operating via youtube.
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Clinician
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Post by dencho1992 on Jan 29, 2013 10:07:49 GMT -6
Hi thanks for your reply I will record a video when I get home later today and post it up for you all to see. but when I suck on the line yea from the tline from the carb nothing comes out as I suck on it (nothing comes from the fuel like from the petcock to the carb) but until where I stop the vaccumm a little spurt comes out. and when I suck on it again or start the vaccum I guess nit does the same no gas comes out till I stop the vaccum is this normal or do u think that is the problem? I have a compression gauge tool coming in the mail itll be here later this week and I will post the psi results when I get them but I heard they were supposed to be over 100 psi or ideally like 150-175psi correct? I hope its just the petcock...
THANKS ALL AGAIN
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Clinician
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Post by dencho1992 on Jan 28, 2013 17:42:34 GMT -6
Ok everyone so heres the deal. i have a 2008 150cc BMS v9 Evo its also known as the heritage and a Znen model... at least i think. anyway it has a qmj157 gy6 engine and its been sitting in a parking lot for lets say about 8 months to a year.
I recently crashed my car so now this chinese scoot is my only way of getting around... if i can get it running hah
Problems in the past. so the reason i stopped riding it was becouse the spark plug seriously blew out like i was riding at full throttle for a while and it just POPPED and stopped running i looked an saw that the spark plug was hanging out. walked it home with a sad face and brought it to the only mechanic in town that would work on it. 120 dollars later turns out all he did was put a new plug in.. it popped out on the way home and walked it home again.. parked it in the parking lot and never rode it again untill now.
So here what ive done so far. i ordered a new cylinder head from ebay with the valves already set. cuz u know i figured the stripped head wouldnt work so well. next i sswitched it out and set the valves to .005 since i guess before i set the valves wrong causing the pop in the head. this time i double checked and made sure i did it right. after i set the new head in i cleaned out the carb i took it out and cleaned every crevis with carb cleaner. checked all fuel lines and vaccum lines the petcock work i tested it by sucking on the vaccum line that runs from the petcock to the carb and little spurts came out of the petcock when ever i would stop sucking. is it supposed to be like that or is it supposed to be a constant flow (it would go as this. id suck nothing came out, id stop sucking then a bit of fuel came out.) i changed out the fuel filter and replaced my battery with a new one. replaced fuse and made sure i have a spark by placing the boot with plug against a ground a starting the scoot.
now i dont have a preasure gauge so what i did to check preasure was put my thumb on the spark hole and tried to start it no matter how hard i pushed it popped my thumb off. theres fuel going to the carb and i reset the mixture screw by turning it all the way in then 2 and half turns out. changed the engine oil and gear oil. hmm i notced my muffler had rust inside it i thought it might be clogged with rust so i ordered a new muffler now regretting it becouse i blew through it and it was not clogged at all.. great.. so yea the scoot tries to turn over but nothing gives just bwuah bwuah bwuah bwuah bwuah same thing... gets a little tiny faster when i open the throttle but nothing.. i thought it might be the auto choke so i took it off and pushed it in a couple times it went smoothly and its a newish bike i bought it about a year ago beginning of 2012 oh i also derestriced the airbox a long while back by rmoving some of the filter cover and leaving jsut one filter instead of 3.
i really hope its not a engine problem for i already pourd 400 so far into this ressurection.. if anyone has some ideas to what it might be please let me know
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