Hi, 
I have a 1987 Westy with a rebuilt 2.1 water boxer and I replaced the throttle body with one from go Westy a month ago. I’m having a problem now with the Westys acceleration. When I first start it up it is ok, but after it warms up the engine surges, the rpms go up and down it’s got me stumped. Does anyone know what could be causing this? 

Thanks 

Robert Snider 

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