Honda Z50A

#1
Hi folks,
I have a 1976 honda z50a and it is running hot after about 20 mins of riding.
It runs good after she cools down again.
I just replaced the top end, timed valves and ignition, starts first kick and idles real nice. Seems to have plenty of power until she gets hot.
Could it be the oil pump? Everything seems to be lubricated on the top end ok.
We were riding it yesterday in 90 degree weather, 200 lb persons riding it.
I don`t know where to go from here?
Any help?
 
#3
Well,
that is a possibility..but how do I know? Idle adjustment is good, the high speed adjustment seems ok....Has original jet as far as I know.....
I wonder if it may be getting vapor lock due to the gas cap on the tank not venting:shrug:
 
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