Best 2stroke carb mechanic comox valley

What vintage motors? What’s wrong with them? What do you mean by tuned? General Maintenance or try to get more power out of them?
 
1990 v4 115 yamaha 125-130 psi every cylinder. Have a problem with one between 1200- 2000 rpm very hard to get past then runs perfectly above that. Both have new plugs thermostats and new fuel and oil. Need a person to diagnose and dial them in.
 
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