1993 gs500e

[Chipper1509]

Hi I'm rather new to this sight and excited to see where I can get on the new project I picked up. I just bought a 1993 gs500e for cheap because the guy could not get the timing set on it, well needless to say I removed the cylinder head cover and it was wrong it was off by at least 10 links but o well that's y I bought it lol. Well my problem is as I'm trying to turn the signal generator rotor I can not get a full turn out of it will completely stop just before it passes the pickup coil. I don't exactly want to just tear into it so any sugestions would be great 🙏

[Watcher]

If the timing is that far off you could be pushing the piston into an extended valve.  If this is the case it may be easiest to just remove the cams, set the engine to TDC, then reinstall the cams in the proper orientation.
Or if you know which way the cams need to turn to be in time you could move them over a few teeth before trying to turn the engine to the timing mark...

[The Buddha]

On this bike, you'd hit valve to valve, not valve to piston, but general concept watcher is right. Easy to see with flashlight in exhaust port and look via spark plug hole and vice versa.

Cool.
Buddha.

[Chipper1509]

well I found the problem pretty simply once I looked there was a broken exhaust valve? I have no parts stores close to me is there a valve from a car I could get from auyozone? Or do I need to track one down on the web?

[The Buddha]

Oh no. Well car valves are huge. Someone with lots and lots and lots of car engine knowledge and lots and lots of time can find one that is close and you can maybe machine it to fit.
Your best bet is kibblewhite or similar or just get stock Suzuki.
Cool.
Buddha.

[The Buddha]

And you have more than just that 1 valve that's broken. Atleast the other valve in the chamber is bent, and likely other cyl aint too good either, and likely the valve piece has bashed the piston and the head.
Its likely going to need pistons and valves and get the chamber shaped again and CC'ed etc etc.
Cool.
Buddha.

[Chipper1509]

Yeah I removed the top end to find all the damage done the other valve in the chamber was bent but I found no physical flaws in the piston or the cylinder should I replace anyway? i have new valves rings and seats in order already, is there a good way to determine if the pistons are still good and usable?

[J_Walker]

Yeah I removed the top end to find all the damage done the other valve in the chamber was bent but I found no physical flaws in the piston or the cylinder should I replace anyway? i have new valves rings and seats in order already, is there a good way to determine if the pistons are still good and usable?

if the piston has no marks on it, the cylinder wall isn't scored up, and the rings are in one piece. it is good.. don't worry about it. just replace the valves.

[Joolstacho]

And while you're at it, fit a new camchain and a new camchain tensioner. Most likely that's what caused the valve tangle in the first place.

[Chipper1509]

Ok thanks for the tips I'll get the parts on order then play the waiting game.

[gsJack]

I had a broken exhaust valve on my 02 about 10 years ago, had already discovered a sticking valve bucket on previous valve checks and one very cold morning it broke while cranking to start.

A forum member who was parting out an engine sent me a set of buckets and I used the best fitting ones on that cylinder with a new valve.  Only a slight nick on the intake valve and a nick on the piston, didn't replace either.  Lapped in both valves to confirm seal and put it back together with new head gasket.

Thar was at 20k miles on clock and it was still running good at 100k miles when I quit riding a couple years ago.

http://img.photobucket.com/albums/v443/jcp8832/GSvalvelogs_zpscvcef42y.jpg