Originally Posted by mark electric
the hi-comp muffler was rusted out where it meets the port, so I have fitted a standard one. Seems to run fine.

Any chance of grinding the rim around the edge of the old power plus muffler to open it up so we can see the internals of the power plus type muffler? It might clear up some recent conjecture. (I reckon it might have an extra hole/s inside or bigger than STD holes, if any different)

I have a rusty std one I can cut open and post pic here for a comparison. What you guy's think? cheers2

Edit: Like so..... [Linked Image]

The 3 Holes are 3/8" in Dia. you can see how the dimple would lower the flow/increase backpressure.

Last edited by FAST GRASS; 30/01/13 12:08 PM. Reason: Photo
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