I have done all the research I could using the wonderful search function, but I am still stumped as to why my Puch Maxi E50 Is not accelerating and hitting a higher top speed.
My setup goes as following:
-1978 Puch Maxi E50
-treats 70cc piston port kit
-treats hi-hi head
-12mm bing bored to 14.3mm
-High flow metal mesh filter
-2.22 atomizer and 70 jet
- mild case match (didn't want to cause a base leak)
-2mm base gasket and .2mm head gasket
-Timed to 18 degrees BTDC with a .018" point gap. I used a timing light.
-Rebuild bottom end with super stuffy crank, new seals, bearings, and put back together with some aviation sealant.
-Stock clutch with kickstart springs and mlm clutch brace.
-17t front sprocket
I am aware that the Hi-hi head is not the best head, but I did not know this until after I ordered the kit. I have access to a milling machine that I could use to dial in the combustion chamber and squish, but I wanted to save that for last. After running at WOT for extended amounts of time, I am only getting just below 250F. My acceleration is pretty bad, but a little bit better after I modified the clutch with the kickstart springs, clutch brace, and went in 2 1/4 turns in from flush. My friend with a za50, velocity stack filter, and proma circuit is still killing me on acceleration. In terms of top speed, I am getting about 38 mph on flat. I get passed by my friend on his maxi e50 with the treats 50cc kit, hi head, velocity stack, boss pipe, and bing 14mm. I have put a lot of effort into this build and I am very committed to getting this moped tuned perfectly. I check for airleaks on the carb, intake, base gasket, head, spark plug threads and exhaust manifold, but found none. Should I expect more out of this build?
I can provide pictures, videos, additional info, or whatever you need.
Let me know what ya think!