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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Mar 3, 2016 3:33:05 GMT -5
fixed it! to anyone reading this who has issues with engine bogging down under full throttle and cutting out (not just bogging down as thats more likely a CVT issue) then the problem is most likely too much fuel getting in your engine, the simplest way to check is remove the spark plug and clean and dry it put it back in and see if it starts, if it does great if not leave the plug out for 15 minutes to let any excess fuel in the engine evaporate. once you have it started let the engine run for a few seconds give it a little WOT and kill it. wait a few seconds, try starting it again now, if it is very reluctant to start remove the plug again, check dry it and re-install if if fires up again first time its too much fuel (or it was in my case) my issue was with the float needle in the carb, i recently replaced the carb as mine was removed when it was stolen, for some reason the idiot in china set the disc on the pin to the lowest setting, i have now set it back to the middle and the bike had ridden like a dream this morning!
next modification replace that plug with a CR7HIX..
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Mar 2, 2016 17:31:04 GMT -5
Hi Update, frame repaired had it welded like I said with the addition of steel welded to the outside to better support it as well he then sprayed it over with a waterproof black spray paint to protect it. Inlet only removed once and the threads where perfectly fine, I was doing my valves the other day as I had issues starting and noticed one of the nuts loose when I went to tighten it down it just wouldn't just kept spinning I removed it and noticed the threads where stripped. i have found one and ordered it. I have a new problem. After doing my valves I had a day of the bike starting perfectly absolutely perfect it has never started this easy even since new. And today the exact opposite I had an issue where when going full throttle it was just bogging down and slowing the engine right down till it cut out it then became impossible to start. I have noticed a few things with the spark plug if i take it out dry it out and put it back in it fires up right away if I kill it after a few seconds and try to start it again not a chance can turn it over till the battery is flat and it won't start but if I take it out clean it up and dry it and put it back starts up straight away, tried changing the plug to a new one and same thing happens I also tested grounding the plug to the frame before drying the fuel off it and there was no spark at all but if I dry it ground it and try again there is a spark on the plug so it's like as soon as the plug gets wet in the engine it stops firing its spark got stuck today and after it died down at full throttle and cut out it would not start had to wait 2 hours for recovery after having no tools draining the battery and kick starting till my foot was too sore to do anymore all this while it was only 4 deg c and raining. Is it a bad cdi not sending enough spark through? Bad coil lead too much fuel getting through too quickly?
Ohh almost forgot to mention it idles perfectly it's only when going wot that it Boggs down and it's not a bogging down like it's in too high a gear or as if it's air or fuel starved all those cause it to bog and struggle and sit at a low rpm this is more like if you was to put the side stand down while riding which I have done and it's exactly the same symptoms that's why I went straight to the spark plug I really think it's either a cdi problem or something to do with the spark plug.
I have a spare known bad cdi and I connected that to test with that it only sends 1 spark every few seconds my normal cdi sends loads like it almost looks continuous
Any ideas much appreciated.
Thanks
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Mar 2, 2016 17:05:21 GMT -5
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Feb 27, 2016 19:49:21 GMT -5
Pardon my poor welding Knowledge but a double weld? As its a circular pipe the frame I'm assuming. Just weld all the way round? The guy who's gonna do it is going to sleeve it and weld it and guaranteed it wouldn't break again he said when you weld something that's snapped the weld then becomes the strongest part is that all correct? He said he's gonna put a pipe inside the frame(I'm assuming that's the 'sleeve' and weld both sides of the frame where it has split onto the pipe leaving a tiny tiny gap about 1 mm and then weld the frame back together over it. What do you think? is he correct and will that be stronger than the original frame as the original frame obviously wasn't strong enough to face up to my weight and what my local council currently calls a poor excuse for road, there's more pot holes than road...
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
Posts: 62
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Post by username on Feb 27, 2016 9:03:12 GMT -5
Hi,
im from the UK the bolts that you slide the inlet manifold over and then tighten it to, one of them has lost its threads, im aware its just a case of using a pair of vice grips to remove the old one and install a new one but it seems impossible to source one from anywhere in the UK. (by lost its threads i mean the threads on the actual bolt)
can i instead just use a standard m6 bolt and bolt it directly through the manifold into the engine or am i likely to strip the threads in the engine creating an even bigger job of having to helicoil it? i do have some m6 bolts with the right size thread...
also my frame snapped the other day (bike is only 18 month old), im going to get it welded tonight but i fear it wont be as strong, should i have a bar welded across it? its the section just under the seat at the side of the rocker cover one side has snapped completely but its a clean break accross and the other side has half split now. or is it best just to scrap it and say goodbye???
Thanks
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 16, 2016 10:12:02 GMT -5
i replaced the carb for a grand total of £16 and that resolved the issue.
i have an issue with just my indicators now if anyone can help? they very rarely work... if i am at full revs and i mean full they will start to work and work fine, and on very rare occasions they will work on idle for a few seconds before going out but this is rare. i dont even get the lights on my dash coming on. now i thought it might be the flasher but if i press my alarm on my fob the indicators work perfectly fine with that. so that would indicate the flasher is fine?
the indicators used to work with the power on but engine not running, im assuming that means they are part of the AC system?
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 7, 2016 17:39:17 GMT -5
Yep ran a standard 250v 13a cartridge fuse for a few days worked fine. Got issues with it stalling out every time I decelerate or let it idle for a few seconds even with the idle screw quite high to the point of it spinning the wheel it will after a few seconds die out, I tried adjusting the fuel air screw. I'm guessing seeing as I replaced to stock air box that was stolen with a k&n air filter with plastic cover it may be getting too much air now. It would make sence as if I try to start it it really struggles but if I pump the throttle a few times to get some gas in first it fires up straight away but as soon as that extra gas is burnt it dies off within a few seconds again. I'm guessing I need a bigger idle jet if I'm to stick with the k&n filter?
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Post by username on Jan 4, 2016 11:29:57 GMT -5
Quick question and I think I already know the answer is no but I have been reading up on fuses I have ordered some 12v 15a fuses to replace the faulty one, I have read a few posts saying its is the amperage that blows a fuse not the volts so I was wondering if temporarily I can put a 250v 15a fuse in place till the new ones arrive in 2 days or even better to get me to my local parts store to get one.
Thanks
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 2, 2016 17:08:06 GMT -5
Ok I'm missing something here without the fuse in everything works fine. Indicators horn etc with it in they stop working now there is 1 large red wire coming from the battery to the solenoid and 1 small red wire this is what has the fuse on and like you said that goes to the ignition and regulator. Now the confusing part is with no fuse so no power going to the ignition and regulator is still get power now a full 12v if I put the probe on the negative battery terminal and put it on each side of the connector where the fuse sits I get a full 12 v if I put the fuse in and put a probe on each side of it I get nothing a cross the fuse but with 1 probe on negative battery terminal and red on fuse holder I get 12v at both sides... Anyway seems like it is the fuse so I'm not going to start it up till that's replaced to avoid blowing something.
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 2, 2016 16:21:07 GMT -5
Ok I assume it is the fuse confirm if this is a correct test please. With black probe on the negative battery terminal if I put the red prob on the side of the fuse closest the battery I get the full 12v if I put it on the other I only get 3v
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Freshman Rider
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 2, 2016 16:10:45 GMT -5
Regulator plugged in key off 3v Regulator plugged in key on 10v just about Regulator plugged out same results as above for key on and off
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Post by username on Jan 2, 2016 15:52:46 GMT -5
Red wire on regulator getting 9v
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 2, 2016 15:46:06 GMT -5
Key off 3v across fuse Key on 9v across fuse
Will check with regulator out now
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Jonway Madness YY50QT-31 2014 (now made of more replacement parts than original)
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Post by username on Jan 2, 2016 15:18:08 GMT -5
To add onto before no the indicators, horn etc don't work
Ok just noticed that when the ignition is turned on the clock doesn't actually go off just very dim. However and hopefully this will help if I pull the break and press the electric start button then it goes off completely my theory is something is constantly pulling current when the key is on causing there to be little available power I.e. The clock is very dim the horn only gets 3v instead of 12 indicators don't work etc not sure what though.
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Post by username on Jan 2, 2016 14:58:50 GMT -5
Nevermind it's started doing it again now...
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