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fizzing along

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dave49
Two Stroke Sniffer



Joined: 27 Dec 2007
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PostPosted: 15:41 - 27 Dec 2007    Post subject: fizzing along Reply with quote
Hi!Ive got two fizzes (yes Im sad to say im stuck in my youth)But ones a half finished project with a yb100 engine fitted.It has a spark but wont run(even with a bit of petrol down the barrel)Does anyone know if anything else needs changing before it will run.cheers all
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cypher
Nitrous Nuisance



Joined: 03 Apr 2007
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PostPosted: 15:50 - 27 Dec 2007    Post subject: Reply with quote
Do a compression check on it. IF you dont have the tool just wind her over with your thumb over the plug hole. No matter how hard you try it should always be able to blow your thumb off the hole.

Good luck

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dave49
Two Stroke Sniffer



Joined: 27 Dec 2007
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PostPosted: 15:57 - 27 Dec 2007    Post subject: fizzing along Reply with quote
cypher wrote:
Do a compression check on it. IF you dont have the tool just wind her over with your thumb over the plug hole. No matter how hard you try it should always be able to blow your thumb off the hole.

Good luck

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It fells like its got compression!Its usually just acase of spark and fuel and that should be enough!cheers anyway
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cypher
Nitrous Nuisance



Joined: 03 Apr 2007
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PostPosted: 16:34 - 27 Dec 2007    Post subject: Reply with quote
You arent using old fuel are ya? Is it a strong spark?
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stinkwheel
Bovine Proctologist



Joined: 12 Jul 2004
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PostPosted: 16:57 - 27 Dec 2007    Post subject: Reply with quote
Just because a plug sparks, doesn't mean it will do so inside the engine. Change it for one you know is working.

Then check the points are correctly set. A spark is no use if it is happening at the wrong time.
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I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.
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dave49
Two Stroke Sniffer



Joined: 27 Dec 2007
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PostPosted: 09:33 - 28 Dec 2007    Post subject: wont fire Reply with quote
cypher wrote:
You arent using old fuel are ya? Is it a strong spark?
No I havnt actually put any fuel in yet!I just put some down the barrel cos thats normally enough just to fire the engine if spark etc is ok.The spark looks fine and consistant when I turn it over.
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dave49
Two Stroke Sniffer



Joined: 27 Dec 2007
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PostPosted: 14:51 - 28 Dec 2007    Post subject: Reply with quote
stinkwheel wrote:
Just because a plug sparks, doesn't mean it will do so inside the engine. Change it for one you know is working.

Then check the points are correctly set. A spark is no use if it is happening at the wrong time.
Found the problem!Its the wiring etc.no condensor and needs new wiring loom(half the wirings broken)
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