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You need to adjust your valve lash clearances to:
Intake: 0.015" (0.381mm)
Exhaust: 0.015-0.020" (0.4-0.5mm) (Try smallest setting first. If still not running right, change clearance to 0.020".)
If you are not sure what part you need after running the tests, please come back to us with the results. We are happy to identify the part you need with the results. :)
from my 1985/1986 official shop manual:
figure 6A1-39 valve stem and guide clearance
max intake clearance 0.08 mm (0.0031 in)
max exhaust clearance 0.10 mm (0.0039 in)
pg 6A1-17 If clearance is greater than the values given in 6A1-39, then replace the valve and guide
pg 6A1-17
standard overall length
intake 106.88 mm (4.2079 in)
exhaust 106/78 mm (4.2039 in)
do not grind more than 0.5 mm (0.020 in)
I have a duromax 16hp engine on a murry go kart ran perfectly fine we took engine off kart painted kart put motor back on go kart now wont idle unless holding choke halfway open and new gas we drained gas before we started work on kart plesas help only about 10 hrs
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