MacGyvering My Zuma.
Today I was working on my bike. I made a right angle rubber intake manifold and a half inch thick open foam sock. I am running it dry although I think some light oil might be better filtration.
I also decided that the day was the day that I should cut off my stock muffler and weld on my pocket bike chamber. The stock head pipe is tapered so I figured that I should cut off the intake pipe on my expansion chamber and weld the stock tapered head pipe onto the diffusion cone. Some technical difficulties ensued. My mig welder was not available so I used my conventional stick welder. The chinese expansion chamber is very thin walled but I got it done.
Spent time working on my jetting. I found with the expansion chamber I could barely get the bike past 25 mph. Just couldnt get the revs up. The silencer had a restriction in it. I took the silencer apart and ground it out.
Thought that I would MacGyver the transmission. I looked at the weights that I had at hand and found that I didn't have any
. Ok my plan was to remove 3 of the weights. Wow what a difference that made. Revs cam up. I weighed my weights and they were about 6.5 grams. I guess I am running 19.5 grams.
Once I got the jetting fairly close It would rev much better and really start coming on at about 15 mph. Once it got to the high 30's it would start pulling to about 45 mph.
During my exhaust tear down I noted the unusual exhaust porting. I can stick my finger in the exhaust port only to feel it get larger near the piston. I suppose that I should tear it down but I just may stick greased cotton in the port and dremel it for now.
My pile of ex Zuma parts is increasing. Gone is the plastic cover. I think I am going to cut off the case past the center bolt. It was full of belt.
More later.
I also decided that the day was the day that I should cut off my stock muffler and weld on my pocket bike chamber. The stock head pipe is tapered so I figured that I should cut off the intake pipe on my expansion chamber and weld the stock tapered head pipe onto the diffusion cone. Some technical difficulties ensued. My mig welder was not available so I used my conventional stick welder. The chinese expansion chamber is very thin walled but I got it done.
Spent time working on my jetting. I found with the expansion chamber I could barely get the bike past 25 mph. Just couldnt get the revs up. The silencer had a restriction in it. I took the silencer apart and ground it out.
Thought that I would MacGyver the transmission. I looked at the weights that I had at hand and found that I didn't have any
. Ok my plan was to remove 3 of the weights. Wow what a difference that made. Revs cam up. I weighed my weights and they were about 6.5 grams. I guess I am running 19.5 grams.Once I got the jetting fairly close It would rev much better and really start coming on at about 15 mph. Once it got to the high 30's it would start pulling to about 45 mph.
During my exhaust tear down I noted the unusual exhaust porting. I can stick my finger in the exhaust port only to feel it get larger near the piston. I suppose that I should tear it down but I just may stick greased cotton in the port and dremel it for now.
My pile of ex Zuma parts is increasing. Gone is the plastic cover. I think I am going to cut off the case past the center bolt. It was full of belt.
More later.
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