Gsx1100 Gasket and Surfaces Help

[Guest]

I'm about to reassemble the cylinders and the headboard, removing the old original Suzuki seals I noticed that they left like a paint (I think it's a sealant primer) on the surface between the planes(pictured you see silver). Should it all be removed completely? How can I do that?

[londonboards]

Oh yes, I would remove all that.

Use brake cleaner or acetone or rub it off. Or use Scotchbrite pads.

https://www.ebay.co.uk/itm/3M-Scotch-Brite-PRO-Hand-Pads-Very-Ultra-Fine-grade-6-in-x-9-inch/282576428868?hash=item41cade1f44&enc=AQADAAAC8FjVrDbVsZ8oH%2F8PNHtt9VX4%2Fw7FZcmMuqsX8uaFEduVZJUf62uWDZO4%2Fz2q3oRzaK85rqW1BqFLla0oOJ5U5zAYtnm30RPEtiT3ArAas62swVGuHRKJ20mQyLZt%2Flv0BrvM2321B3qv2ePC1PbFqUWDf8GJHZAnj6yE1OtGSXl0dreBY3aAB9v806w5seaQwmsvXxSTUQBtPPcxdvgQVl49eErgp75%2FamCZglxel22Wrx4fNG0MVmLE1685noHpjTC3TCZ22vfblsrRfzlWKFaanxo8P9Ki5yClQUHR7TXmULN7UZTuzz0govrPu4T1vEDEo3r9Swv21Z9oT26GieqBlg%2BnzPEAvuSV4gICOdTkH1nukLh6TZOD8gph3iQ5WOv3L871NY8UQvqNTh7kEHnlbztGQmmSVuSnbDDwDqCD09GoiKJT%2BqjqSRKwqD7a60jKU3MDAkQKmfDctG8ITmylMzMUE9NOMbjx7mbQa3C%2BuXAO2Pk78Pw1LC%2FFCzaina%2FCUewMWZauLzdSOq7md9B0fzvF891Vz%2B3DUpDUcSRknFLeHb1r1NOKXJgbb2VN1DQfUmlkR9maVh3IkBGDzlxvnNd4Xf7BKlLHH0ECHfCOf64LN92uHRcEEOtX88iU4gpzSgahiQfswOQwpxKL%2ByHSV%2BPG1NFFAt6LpLrTOFJ9taANT%2FU1uquCPDuzk4m8zbVnc7%2BsRN0Gs63v%2Fc3iNyLau4hy8JwgRgkltjhZoUg4KZxAHLSWeMaCUOL99sd6cYoteWbOrZrQwNEs402pAWpH86Skcm910aT3yb7VqNUnYCMzf6MpGQi7fX%2Fr1hK%2FhwAsmq3db6QSs3fYD%2Fd2s%2FuljuW0fRvfxufU5GEL710FXzwS7k%2FQa8l%2Fmhm5K8oedUfhRPpuWeXY8JBU4gku5Uz67Jh99WIByy3qZph3LL%2B8vIP5aTIXsus1ZCvAEo9Pic%2FBqMuEhhIzlnJ9uOoUQYWGl02WlvEhBWdFO9T9q44j&checksum=2825764288682b40d8ea4028428f9e455040756f9b45

Greetings

Richard

[GregT]

You did a nice job of getting everything else off.

I was talking to a professional Suzuki engine builder and we were talking about removing gaskets and I mentioned 3M pads. He chuckled and said it was one of the things that kept him in business, repairing leaks caused by the pads creating uneven surfaces. The Scotch brite pads round the edges of the surface. He said he always used "sharpening stones" to remove gasket material.
I've seen other professionals say to use 1000 grit paper attached to glass (flat) surface and then just move the mating surface around on it. Need to really clean up any abrasive left.

I've never been able to find a video of sharpening stones being used.

They're a small oilstone. Just like something you'd use to sharpen a knife. Don't use them myself as the few times I tried them, I finished up with cut fingers from casting flash. The 3M pads do a good job of protecting you from that.
The pads are good - used lightly and wet.

[akronos]

I used the 3m brite scotch, I managed to make the surfaces flat. Great!
I noticed while I'm reassembling all an abnormal coloring inside the exhaust collectors , here's the photo. The valves and the game valves in the cylinder 4 were perfect , the carbation equal and adjusted for all four cylinders...

[londonboards]

Looks like the cylinder on the left is running very rich.

Could be over fueling, incomplete combustion (bad compression, bad spark) or potentially oil in the cylinder (poor valve seals/guides).

I would always start by making sure the valves are adjusted correctly, that there is good compression, that the spark is nice and fat and blue and then look at the carburettor.

[akronos]

the manifold on the right (that of the fourth cylinder) is very white, is it not a symptom of too lean carburetion?

[GregT]

the manifold on the right (that of the fourth cylinder) is very white, is it not a symptom of too lean carburetion?

I tend to agree that the pale one is the odd one out. Not necessarily lean carburation, could well be an air leak at the pipe to head joint.
You've said previously that all combustion chambers and valves were fine. Presumably even colours too ?

[akronos]

Spark plug in 4# cylinder are slightly clear..

[akronos]

The exhaust valve in 4# cylinder are whiter than other,spark plug too.

[GregT]

Either an air leak on the intake side or possibly a lower float level on that carb.

Edit - Have the carbs been properly synchronised ?