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    NEW STS .28 engine problem

    I already have an aftermarket exhaust on the Savvy. I'm using Trinity monster fuel 20% nitro. I've heard that STS went out of business... Hopefully I can get some support.
  2. A

    NEW STS .28 engine problem

    Hello, I have been trying to get my STS D28M engine (with factory settings on the carb, though changing them doesn’t seem to help any) to work correctly in my HPI Savage LE for six months now. Please keep in mind I am not new to nitro engines, and the hobby shop couldn’t fix it either...
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