Nigkat

In the process of rebuilding my kat motor after oil pump failed and fried the top end. Are there any issues when using reprofiled cams? Tempted as they're less than half the price of new billet.

Yeah definitely sounds like that. Haven't got the oil pump out yet only top end removed. Did check pump and oil pick up before reassembly, cleaned strainer, new oil and filter. Using a pingle tap ,but is a few years old and heard of them failing. Not a lot can do now just strip and see what if anything is salvageable.

Well Fuel tap was definitely open as I was riding at the time. Sticking float sounds about right.

Top end dryer than a dry thing. Engine was ffing hot. Fuel in the oil. Well fucked that's for sure. What can cause this?

Everything was dry and obviously got very hot. Drained the oil and it was full of petrol.

Not sure what's going on but I can't reply to my Dead Kat . Every time I try get a load of random stuff in the reply box and then screen freeze. Any way here what all the carnage looks like.

Well after a full head rebuild and a few false starts, problems with ignition pickups and an iffy coil and a few other problems. Got a mot, happy days. Out for a ride Monday all going well. Came off the local dual carriageway and an almighty screeching noise. Killed the engine immediately. Pushed it home luckily not to far. Bloody hell it's heavy. Got home had a look in the oil sight glass and it was full and runny, had a sniff and it stunk of petrol. Fuck. Anyway started taking it apart today, fearing the worst and was not disappointed. It's definitely completely dead now. Pissed off to say the least. New engine time.

My bent inlet valves were 27.5mm. I thought I had found a set, specified that I needed 27.5mm dial. I have received 27mm ones. The supplier says that they are fine. But will the seats need recutting or will they lap in OK? If they need recutting I might as well go slightly larger. ??

Never heard of them before but look like just the job. They are + 1.5 mm. Very reasonably priced to, might even treat myself to some titanium retainers if I don't find anything else wrong.

Cheers I'll have a look.

OK thanks and no not got any valves. Think mine are+ 1mm but will have to check. What is the std. Inlet valve size?

Stripped the head and all the inlet valves are bent. Seats look OK, just need to check the guides to see if they are worn by the bent valves. Hopefully not. What is the best way to check? Think I'll replace the cam chain. Don't really want to split the bottom cases. What do you think about replacing with a riveted up chain or bite the bullet and replace with new endless one?

Found the problem. Rear cam chain guide snapped in 2 places. All the inlet valves are sitting proud and a few marks on top of the pistons. Hopefully there won't be to much damage to guides and seats.

OK thanks I'll give it a go.