I did some trial runs with my elongated and silenced expansion chamber. Pickup was better but it still hit a wall at 46 mph. I am guessing that the breathing of the engine is well.... out of breath.
I have been using the stock head pipe about 8" long and tapered, starting at 19mm. (which should be a good thing.) It is made for a 35-40 mph design with midrange. According to Jennings the headpipe should be no more than 8x the port diameter in length. I am at about 10-12x at this point.
I need better breathing. My plan now was to make a new head pipe of one inch ID. I worked on making a flange and curving the headpipe, I cut several small pie wedges of pipe and welded them together. I stuck it on and realized that the centerstand is right where I want the pipe to run. Time to switch projects.
No problem I hated the centerstand from the minute I got this bike.
I have made side stands before and have used two sections of square tubing. The outer is one inch and the inner is 3/4". I welded the larger onto the frame tube where many of others have bolted or welded on plates.
My new stand tucks in great. It is recessed completely. I will take the lower plastic off so that I can weld the lower seam.
My new expansion chamber languishes tonight, and will perhaps for another week. At least I have a flange and headpipe.
I know pictures. let me see what I can do. I will definitely get a photo of my current expansion chamber before I cut the heck out of it.
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