Dropped a valve, what are my options?

[VJ]

My bandit 12 engined teapot fighter has snapped an inlet valve, from what I can see a locknut came loose, the adjuster span out and the valve promptly snapped, I assumed it was carbs as ive had issues before and managed to limp it around on 3 cylinders for a while but Ive got the valve cover off at the moment and its definitely snapped an inlet valve stem.

 

So what are my options and how much time/money will they set me back? I fucking love this bike but she's already cost me a fair bit in the last few months and its starting to get painful on the wallet now.

 

 

Cheers

John

[Captain Chaos]

with some luck only the valve will need replacing.

More realistic, piston and possibly head also f*cked. You will need to open her up and inspect the damage.

[dupersunc]

Most likely, cylinder head, piston and the big end bearing on that cylinder too.  Sorry.

[teltwosheds]

VJ must stand for Very Jammy. If you rode it the valve must have bent above the guide before snapping and not dropped into the combustion chamber     

[VJ]

I was riding and it dropped to 3 cyl, it then took me over a week of trial and error pissing around with spark and carb related stuff before I opened the lid to notice that a valve is snapped in half. Im fairly sure it'd run on 3 again if i bolted it back together now.

 

Im just about to whip the head off for a full post mortem, If its suitably hilarious I may well post pictures.

 

 

Cheers

VJ

[VJ]

so, snapped and bent valve, cracked valve guide, cracked combustion chamber, dented piston.

 

Fuck me these engines are strong considering it did 50 odd miles of commuting in that state

Edited January 28, 2016 by VJ

[markfoggy]

If it's dented a piston, it will have flat spotted the big end shells as well, Sorry