Should I deck the cylinder and adjust the squish? Isn’t it too big sense it didn’t even touch the solder? Also I currently have the needle clip at the second from top position I’ve tried the top position and it makes the spark plug kinda white so I think it’s too lean. I’ve never tried changing the jet though.
Wouldn’t it increase the compression? The head is more expensive then a new cylinder and I actually have a spare cylinder already that’s why I was thinking of decking the cylinder and not the head, if I deck the cylinder where it mates with the head I’ll get the same results won’t I?
That is far too big, it's no wonder you are not seeing an increase in performance. I recommend that you deck the cylinder, don't do anything to the head, if you try to sand it down you will most likely destroy it.
That's a good point. I was using an original FredHead which has a volume of 6cc
Okay I did it just like you said I did it once then reassembled and tried to check squish but the solder still didn’t contact the head so I sanded a bit more and checked again and still barely contacted, the piston didn’t stop like when I did it without the head gasket. Should the piston stop when im closer to the proper squish? Does this just mean I still have a bit more to go? I’m scared to overdue it so I didn’t do that much.
Damn, are you sure you don't have 2 base gaskets on there? This sounds kinda strange, are you certain you have a fat enough piece of solder? Basically what I did was cut two small strips of solder about 1" long. Gave them a slight bend so they match the contour of the top of your piston. Next, remove the head and use some heavy grease to stick the two bent 1" pieces of solder on the top of the piston so that they bisect the piston down the middle. Placement is important! They must be directly in-line with the piston wrist pin, and they must sit on opposite sides of the piston, so that one end of the solder piece goes right to the edge of the cylinder. Also, take your spark plug out, you don't want compression. Turn the back wheel to crush it down. I wouldn't sand anymore on your cylinder until you know what the current gap is.
Yes I do actually have 2 base gaskets. My engine came with 2. If by base gasket you mean the ones between the cylinder/crankcase.
I think two base gaskets is probably part of your problem. I would remove one and do the squish again. I also noticed something in your original post that I didn't notice before. I would put the baffle back in your exhaust. Unless you have a highly modified engine, removing the baffles will do more harm than help. Your engine needs the back pressure to run properly.
Yes, that is called the base gasket, you shouldn't have 2, remove one and then test.
It's not that necessary, but if you get a high compression head, you are not taking advantage of that if you're squish is too big.
Yeah my bike ran fine before, but it’s a high compression head and it lowered my compression. So it’s obviously not setup right
I removed one of the base gaskets and tested squish again making sure this time the solder was in line with the wrist pin it actually stopped the piston this time. I tested it twice my solder originally measures 1.45mm but the squished parts are measuring about 1.30 so does that mean my squish is 0.15mm?
And the goal is 0.03” which is 0.762mm right so I still have a good bit to go?
