Originally Posted by
LA TECH
Your Riso is out of adjustment, it needs the three critical timing point to be adjusted, otherwise no matter what you do adjusting it it will give you problems, the GR service manual tell you how to do this is simple if you know what you are doing, loose the main drive and lock the main drive gear and the other points also check the air pump to see if the "O" ring is not worn out it will cause jamming problems too, if you are not familiar with it call a Riso rep. So they can do all the adjustment hopefully he want to work on it because all the Riso tech wants to work on the new Riso series
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