head broken valves Errr.. That will polish out. Oops.

[Madb]

Not really going to polish out, but nice to rhink positive, eh.

[Sheep]

Ouch.......i was going to suggest Autosol but maybe not.....

[Madb]

I got polishing mops? Oh maybe use shum grinding paste.

[KATANAMANGLER]

You're half way to a 5 valve set up, keep going

[Madb]

Were thinking of filling two ports and making a two valver... save buying new valves eh. Or maybe cut 1 cylinder off making a triple gsxr?

Edited October 5, 2016 by Madb
Spelling. !!

[Joebloggs]

Bit of liquid metal and it'll be good as new.........

[Madb]

Not quite why she went bang. Well, dint go bang as such. After my last trackday she were running good all tho i could only hit 124 mph down bently straight i suspected head gasket gone, rho no complaints as the engine had done well over 100,000 miles. Thought ok. Time for a refresh. Anyways, i rebuilt engine , new every thing, first test ride sounded lush. Pulled so much better and no flat spots. 

Anyways, just about run the old gal in after about 450 miles everything running lovely. As i pull out of a junction i heard a ticking noise then so as ya do flicked the kill button. Recovered bike in van and this were the result. Spark plug had no inner electrode and found one of the valve collects forged inside the valve retainer. 

Still dont know why she broke but hey its part of the fun, yes? Only cost i lost wes the cost off complete gasket set at £66. 

This happened in may this year. 

[Madb]

Oh and rest of engine is fine. Even the conrod not bent. Tho before ya ask.

No i havent used any parts for the new rebuild. 

[Jaydee]

4 hours ago, Madb said:

Oh and rest of engine is fine.

Is that a hairline crack I see? 

[Madb]

Err no. Just carbon. Added lightness!

[Madb]

1 minute ago, Madb said:

Err no. Just carbon. Added lightness!

Err. Just looked again at head and no hair line crack just a hair! So yer half right.

[Legotoy]

What brand gasket set did you use? Just interested, maybe tolerances in that brand had something to do with it - thinner head or base gaskets for example?

[Madb]

Athena. If gaskets were different surely more than one cylinder would have been effected?  And this happened 450+ miles after rebuild. 

Me thinking just one of those things.

[Madb]

Trying to find the valve retainer with the forged collet. Basically its sitting where the shim sits on top. Thought thats different!

[teltwosheds]

well I reckon it was the spark plug, seen it happen on a few 2 strokes years back. Sure glad it's not a common occurance .

[Madb]

1 hour ago, teltwosheds said:

well I reckon it was the spark plug, seen it happen on a few 2 strokes years back. Sure glad it's not a common occurance .

Haha. Yeah them were the days, eh.

Do miss them strokers. At least they were fairly easy and quick to repair.

Oh and push when they broke down!!!

[Madb]

This is the valve retainer with the forged collects . Hmmmmm.