Starting problem

[wraith]

Ok all, think I know where to go on this but just going to run it by you lot 

B12 engine. Running 100% last week, came to go out on it today and it wouldn't start, turns over then a big back fire from the exhaust, then the starter clutch goes clunk.

I've removed the atu cover and all looks ok in there, and I've removed the starter clutch cover and all looks well in there. Next is to remove cam cover and check timing.

Or should I be looking at carbs.

[Blubber]

Has it got :

 

Fuel

Spark

full battery

Working kill switch

Working Side stand switch

Working Clutch switch

 

Just to rule the obvious

[wraith]

Side stand switch removed 

Clutch switch removed

Got to check spark

Can smell fuel 

Full battery 

[fatblokeonbandit]

is the sump full of petrol????

[wraith]

17 minutes ago, fatblokeonbandit said:

is the sump full of petrol????

No, nice oil in there, drained it earlier this evening.

And yes have a spark, not the strongest one I've ever seen but a spark on all 4 cylinders and all the same strength.

One plug came out wet and the others where dry. Fuel in the float bowls, so could be pilot jets.

It's my folt, I was just thinking that in the next week or so I will do the winter service, check tappets etc  so jinxed myself 

[TonyGee]

try another set of good plugs wraith,  this is common on the 600's but the 1200's sometimes have the same issue. 

[wraith]

17 minutes ago, TonyGee said:

try another set of good plugs wraith,  this is common on the 600's but the 1200's sometimes have the same issue. 

As it so happens, I've got a new set of Champions in the took chest 

[TonyGee]

2 hours ago, wraith said:

As it so happens, I've got a new set of Champions in the took chest 

worth a try bud