Alright, 1.3mm is equal to 0.051" and you want about .03", therefore you have 0.02" to go or 0.508 mm more. You need to get it to 0.762 mm which equals .03". Since your squish is less than .006" the head should have shown a little improvement if you had taken off the extra base gasket.
Once you get the head set up correctly, if it is still not fast enough for you, another inexpensive way to increase your speed is a sprocket with a lower tooth count. I am going with a 32 tooth rear sprocket. I am installing it tomorrow. I will let you know how it turns out. Well, actually later today.
I’m a little confused on how you determine the squish. So you measure the squished piece of solder and the overall measurement is you’re squish? I thought you measure before and after squishing it and the difference is the squish
So my goal is to get the squished piece of solder to measure 0.03”/0.762mm if I understand correctly?
When you are measuring squish, you are measuring the gap between the piston and the head when your piston is at top dead center. You only have to measure the solder after the you squish it, and you measure it at the thinnest point, which should be close to the out side edge of the cylinder.
After you compress the solder you remove the pieces and measure the smallest point on any of the pieces of solder. The smallest measurement you get is the squish, it's the spot that's most compressed you could say.
Okay I wasn’t sure cause you’d think it would change depending what size of solder you use wouldn’t it? But anyways I sanded the head some more and retested and the squished solder measures right about 0.76mm. It seems to run a little better and compression is now at 110psi
Let me know how the 32t sprocket works. I’m definitely interested, I’ve considered it before but am worried that it would make it so you really have to pedal to get the bike going with a small sprocket like that.
You should be able to wind it up a little more at the top end, I think removing that extra base gasket helped the compression too. It's hard to believe they would put 2 base gaskets on, oh wait...... no it's not.
You will notice it going up a steep hill, you have to peddle to keep your RPMs up
Will do, it might be a couple of days.
It took me a little longer than expected, but I got all of my current upgrades done, including the 32 tooth sprocket. it is awesome. I decked my head down to .039", installed a pull starter, ceramic High temp clutch pads, 4 liter gas tank, and a 32 tooth sprocket. All of this gained 10 mph for me. It is slightly slower taking off from a dead stop, it still can do that without pedaling. This is a good thing because the pull starter is in the way, and I can't pedal this bike until I get some wide cranks. It does 25 mph up a 30 to 35 degree incline, which is 7 mph more than before. So the guy that said you would have trouble going up hill was incorrect. It does a steady 40 mph on flat ground, 10 mph more than before. Going down that same 30 to 35 degree hill, I hit 50 mph, again 10 mph more. Basically I gained everywhere except low speed acceleration. Which was only a slight loss of performance. My suggestion for you on the 32 tooth sprocket is "go for it" I think you will like the improvements you will get.
Nah. I'm just a crazy old biker who misses his Honda Shadow. I did a 100 mph on that a few times. I'm not done with this bike yet. I'm still getting a reed valve, a better exhaust, and a BBR Stage 2 racing CDI. I also am going to get a degree wheel so I can do a proper port and polish. This one isn't even the biggest one. I have an all aluminum bike with a built in gas tank that I can pick up with one hand. I'm putting a 212cc Predator motor from Harbor Freight on that one.