Installed this on my mild 50cc Hobbit build. Quite a bit bigger than the stock head and the temps came down a bit and are much more stable.
Be prepared to do a little modding to fit it properly. I installed the recommended head studs rather than use the factory bolts and that was a worthwhile upgrade. However when they modify these heads for the Hobbit they don’t mill off the raised boss around the holes for the head studs. I used a sanding disc on a Dremel to carefully flatten them and the result was much improved.
The stock head sucks. Get this!
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Works on Yamaha qt50 too
September 16, 2019
taco eater :
J.R. Custom Cycles from Columbus, OH United States
That's right stock cylinder tuners. Looking to get the most out of your tiny little engine? Replace that stock cylinder head with something meatier and watch temps drop, drop, drop. Stock head makes a great paperweight. See picture here = http://qt50.net/wp-content/uploads/2019/09/puchhondahead.jpg
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Head
July 7, 2018
taco eater :
BaconnatorNorris from Winnipeg , MB Canada
The cylinder head looks nice needs shorter bolts Cleared frame and petcock and proma pipe Low profile m10 socket works best
Cooler Heads Prevail! 
