Hey slestak didn't you say you met Mr A12? Maybe he might know Mr A13?
I think that the A12 or A13 cams are a big improvement over stock with the more lift and duration.
My Wife's big bore stroker motor 183cc with the stock cam was a dog above mid rpm. The 155cc with a stock cam would beat it every time heads up drag race after about 75 feet and would pull away. The 183cc with the stock cam would climb like no other just no top end.
The A12 is for low end but I got power all over the rpm range up to 8600rpm when it maxed out at 33mph with the 39t sprocket. Probably the carb or exhaust kept it from going higher witch is a good thing. I am now going to keep the rpms below 8000 because with the 31t and the 13/43 gearing I would hope to get a max speed of 35 to 38mph and a cruise speed of 30mph. Any faster on the trails and it could be trouble.
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