Bike wont start HELP !!

[DrAlf]

Do a search - steptoe posted it some time back and well worth a look. Can't be arsed to search for you! Steptoe AND Hall Sensor should get it.

Try the easy stuff first though - did you try the old spark plugs and have you checked the little rubber bungs? Both have caught me out in the past.

 

[kirky1298]

Thanks again , I'll go and change the plugs back to the old ones .
I found the hall sensor test too
I'll report back shortly .

 

[DrAlf]

Great Good luck – you’d have to be very unlucky to experience a major unrelated failure whilst servicing the bike – although it has been known to happen Let us know – it’s all useful

 

[kirky1298]

Still no joy .
changed plugs back , re-checked TPS, Pump runs during Hall sensor test .
I THINK I'M BEAT !!!

 

[kirky1298]

oH , AND BATTERY IS GOOD .
it's been on charge all day and is showing 16v dropping off to 13v during prolonged cranking of the engine .

 

[taffyflytyer]

Long shot if you have had tank off check to make sure the breather is not pinched as this wll cause vacuum in tank and starve engine of fuel

 

[DrAlf]

Knackered coil pack then? If it's not that I'm out and would suggest a call or visit to Steptoe. However if it ran before and now it doesn't it's very likely that its related to something that you've changed. Let us know....

 

[kirky1298]

Plugs are wet with fuel Taffy

 

[kirky1298]

Thanks for all your help guys , think i'll sleep on it and have another go tomorrow night

 

[niko]

oH , AND BATTERY IS GOOD .
it's been on charge all day and is showing 16v dropping off to 13v during prolonged cranking of the engine .

that voltage looks a bit high ,about 14.7v should be max

 

[kirky1298]

that voltage looks a bit high ,about 14.7v should be max

it may be just my cheapo volt meter
that i set my TPS with
BRB

 

[kirky1298]

Right then. Today I spent £13 in maplins electronics and assembled a nifty wee Hall sensor testing unit that will also help with timing the bike up .
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The hall sensor is bench testing fine and doing what it should when you pass a feeler gague through the gap ( even with a heat gun blasting it ) and all the wiring checks out ok .

What next

coil feed and then check the resistance

 

[Canuck]

Not your ignition electrical switch wiring? Have you tried wiggling it beneath the keys... may be a long shot but worth taking the 5 seconds to test it. You did plug the TPS back in... no fuses blown or anything...

 

[kirky1298]

Not your ignition electrical switch wiring? Have you tried wiggling it beneath the keys... may be a long shot but worth taking the 5 seconds to test it. You did plug the TPS back in... no fuses blown or anything...

would the ignition wiring cause the bike not to have a spark but still turn over ??? does anyone know ???

 

[Canuck]

No idea... but I had all kinds of weird symptoms from abs shutting off periodically, to bike shutting down for a second then restarting while I was still driving, to just clicking when I tried to start it. It only takes a few seconds to check... just wiggle the wires around where they come out of the headstock and see what happens. If the bike shuts down then you have it sussed... or at least part of it.

 

[kirky1298]

WOULD YOU ADAM AND EVE IT !!

Just built the bike back up after pulling the coil pack off for a look Don't know what I was looking at but I had a look anyhow .
Anyway , turned the key hit the button and it fired right up before the engine turned half a revolution . It really does sound sweet , but I'd have liked to get to the bottom of the fault. you just know it's gonna happen again , probably 400 miles from the front door

THANKS TO EVERYONE FOR TAKING THE TIME TO HELP ME OUT