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Bike won't start, don't know why.

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pdbh32
L Plate Warrior



Joined: 18 Apr 2016
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PostPosted: 10:02 - 08 May 2016    Post subject: Bike won't start, don't know why. Reply with quote

Hi,

I have a beat up BTS GY 125 (kick start only) Chinese motorcycle, and can't get it so start, I'd appreciate any ideas on doing just this. Here's what I know:

- The ignition wiring is fine and it sparks
- Petrol is getting from the tank into the carb
- There is suction at the carb (put my hand against air intake whilst kicking)
- Choke/Throttle fine
- Has new air filter and exhaust fitted (yes I know it's on the wrong side Very Happy ).
- When putting a little petrol down plug bore it does indeed start up, but only turns over a couple times before dying, even with throttle, as if there is no petrol getting to it.

Could it be that it's something as simple as the air-fuel mixture screw being off? I could get a new 26mm carb for £15 if all else fails?

Here's a quite recent photo:

https://tinypic.com/view.php?pic=jkf0up&s=9#.Vy8OiRZkKds

Link to photo: https://imgur.com/j1BVKW5

If anyone has any suggestions on what I can check or do to try get it started, please do share. Thanks in advance,

Philip.


Last edited by pdbh32 on 10:11 - 08 May 2016; edited 1 time in total
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 10:08 - 08 May 2016    Post subject: Reply with quote

Only looks a little stolen.

Is it definitely sparking.
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pdbh32
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Joined: 18 Apr 2016
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PostPosted: 10:13 - 08 May 2016    Post subject: Reply with quote

Paddy. wrote:
Only looks a little stolen.

Is it definitely sparking.


Found it in a field.

Definitely sparking, swapped out the spark plug for a new one. Like I said, I know that aspect works because when a little petrol s poured down the plug bore and the plugs put in it starts. Had to rewire ignition system as electrics were ripped out…

Thanks for the quick reply.
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c_dug
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Joined: 04 Sep 2007
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PostPosted: 10:24 - 08 May 2016    Post subject: Reply with quote

Finding it in a field doesn't make it yours.
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pdbh32
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Joined: 18 Apr 2016
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PostPosted: 10:30 - 08 May 2016    Post subject: Reply with quote

c_dug wrote:
Finding it in a field doesn't make it yours.


How about if it's got a sign saying 'please take'. When I say field I don't mean in the middle of a farmer's plot of land. I mean a place full of tracks which young kiddos on pit bikes frequently visit. It was obviously left by someone who thought it was past its day or couldn't be bothered to fix it up, and so decided to leave it for someone else. Please don't let this thread turn into a debate on the ethics of that, I'm here for technical advice, sorry to anyone I might have offended.
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NJD
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Joined: 11 Mar 2015
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PostPosted: 10:34 - 08 May 2016    Post subject: Reply with quote

Still isn't yours.
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iooi
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PostPosted: 11:21 - 08 May 2016    Post subject: Reply with quote

pdbh32 wrote:
I mean a place full of tracks which young kiddos on pit bikes frequently visit.
It was obviously left by someone who couldn't fix it up, and so decided to leave it


So how do you know that they were not coming back to get it going (once they had been home to get the tools) and get it home.... Twisted Evil

I would shell out for a new carb and anything else you think it needs. Then hope the owner does not spot it Laughing Karma
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pdbh32
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PostPosted: 11:45 - 08 May 2016    Post subject: Reply with quote

iooi wrote:
pdbh32 wrote:
I mean a place full of tracks which young kiddos on pit bikes frequently visit.
It was obviously left by someone who couldn't fix it up, and so decided to leave it


So how do you know that they were not coming back to get it going (once they had been home to get the tools) and get it home.... Twisted Evil

I would shell out for a new carb and anything else you think it needs. Then hope the owner does not spot it Laughing Karma


I think that in cleaning the carb out I altered the air fuel screw, as just took off carb and screwed it all the way in, then 3/4 turns out. Started 4th or 5th time. Just me being stupid :/

I don't think they'd just left it there to get tools, like I said it had a sign and it was beyond the state where you could just patch it up there on the spot, it did not look like it had just given way mid ride (without even a spark plug cap) rather it looked as if it had been left there intentionally. Since then I've had to shell out well over £100 getting new exhaust, new cables, rewiring and cleaning. Thanks for all advice anyway.
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Rogerborg
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PostPosted: 12:11 - 08 May 2016    Post subject: Reply with quote

pdbh32 wrote:
It was obviously left by someone who thought it was past its day or couldn't be bothered to fix it up, and so decided to leave it for someone else.

It was stolen and abandoned, or the owner was coming back to fix it.

You, sir, are a thief.
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iooi
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PostPosted: 21:14 - 08 May 2016    Post subject: Reply with quote

pdbh32 wrote:
like I said it had a sign and it was beyond the state where you could just patch it up there on the spot, it did not look like it had just given way mid ride (without even a spark plug cap) rather it looked as if it had been left there intentionally. Since then I've had to shell out well over £100 getting new exhaust, new cables, rewiring and cleaning. Thanks for all advice anyway.


Well known trick to take the plug cap off to stop the odd thief from riding off on your bike.
Does sound like it was dumped, but maybe a trick. You fix the bike up, they now come along and claim it back.
What would you do then? Do you have proof of the sign and where you found it?
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pdbh32
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PostPosted: 22:23 - 08 May 2016    Post subject: Reply with quote

iooi wrote:
pdbh32 wrote:
like I said it had a sign and it was beyond the state where you could just patch it up there on the spot, it did not look like it had just given way mid ride (without even a spark plug cap) rather it looked as if it had been left there intentionally. Since then I've had to shell out well over £100 getting new exhaust, new cables, rewiring and cleaning. Thanks for all advice anyway.


Well known trick to take the plug cap off to stop the odd thief from riding off on your bike.
Does sound like it was dumped, but maybe a trick. You fix the bike up, they now come along and claim it back.
What would you do then? Do you have proof of the sign and where you found it?


No I don't, and in answer to what I would do then: if they had the legitimate V5C document, then of course I would have to give it back: just take of all parts I added first. I don't have proof that I didn't knick it, all I can do is give my word. It's up to other people how they interpret it, but I don't think I did anything wrong or that most other people would have acted differently. If you disagree, that's okay and you're entitled to your opinion. However I do find it frustrating that I come onto the technical advice part of the forum to ask for help, and that most of the replies I get are just in criticism of a choice I made. Unless they're psychic, no one can say that I'm lying, and that I didn't find it as I described or that I don't honestly believe I've done nothing wrong - so why can't people just take my word and leave their scepticism to themselves, and instead focus on helping me, rather than making needless jibes?

In reply to what you said, yes I suppose people do sometimes do that (although it was the cap not the plug that was missing). However a multitude of components were non-functional: snapped clutch, seized throttle, seized rear brake, no ignition wiring - the list goes on... To me this did indicate (as I've already said) that it was left because someone no longer wanted it and therefore wanted to give it away to someone that might find better use for it/have the time or money to fix it up.

It does indeed now run, as I can confirm it was the air fuel mixture screw at the bottom of the carb that was causing problems, with far too much air coming in, which would explain why the plug seemed dry every time I took it out.
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Pete.
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PostPosted: 23:38 - 08 May 2016    Post subject: Reply with quote

Well done for getting it going, but stealing by finding is still theft, no matter how you regard it yourself. Actually theft is taking with the intention of permanently depriving the owner, so as a matter of fact you're probably more of a thief than whomever took it first time round in the eyes of the law because you've taken it for your own whereas they could claim they were just going to ride it about and then take it back (which is why we have the TWOC offence). Something I learned on jury service right there, a guy who took the wheels off a stolen car got prosecuted for theft but the guy who took the car didn't.

All you've done by making it run is massively increase the chance of getting collared for it.
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P.
Red Rocket



Joined: 14 Feb 2008
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PostPosted: 07:13 - 09 May 2016    Post subject: Reply with quote

Yeah, I'd get shot of it. All it takes is the owner to come on here, see it, you get raped.
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