a 50 degree decrease in temp is about impossible just by bolting on a cool head. You really need to know your compression and squish when dialing all this stuff in. I cant recommend timing and octane settings without knowing this stuff.
The only time I ever heard detonation in a 2 stroke, it blew up immediately afterwards. You dont want to try and hear it. If your compression is 150, your squish is under .060", then your timing can be all the way up to +6 or so on 92 octane pump gas.
did you leave the stock o-rings out? Did you make sure the hub end pressure plate was flat on the last fiber on the install? Are the clutch case engagement arrows lined up? Is the cable slack adjusted properly.
You dont use the cascade stuffers/ You have to grind a 2 into 1 intake and the stuffers to match the ports properly. The vf3's will outflow boyeseen reeds any day. People dont get that the more reed petal port area the better. If you stick with a stock cage design your running about 3/8 less exposed port area compared to the vf3's.
If you run a ton of compression or over rev the engine it can come out of phase. Most of the timne, thats all it does, then you got to tear it down and rebuild the crank.
Show us the other side of the carb, and a pic of the slide. Looks like a mikuni vm roundslide. I have never seen anything like that with the linkage on a banshee. I have a banshee in the garage with 2 mikuni vm 34mm's on it though.
Here is the front and back of the intake. Its done, just need to sharpen the edges of the porting on the manifold off. Only thing left to do now is match the cages.
Why didn't you have the guy who sold it to you also sell you the boot? He said in the auction that he had them. RPM makes that intake pictured. I doubt trinity's boot will fit, cause the trinity boot is way different than the cascade boot. I have both in the garage right now.
The stock boot wont work because its is for twin carbs. Who made the intake? The trinity, cascade boots are different. Was it the one on ebay with the milled lines in it? Probably post or send me a pic and I can help you out.