Improving 4 stroke performance? (Subaru Eh035 friction drive)

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MysterySandwich

New Member
Jun 30, 2012
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California
Hey so I just recently bought a used subaru eh035 friction drive, just wondering if there are any performance upgrades I can do?

The engine seems to be boggy at full throttle usually, and especially on hills. Besides getting a smaller spindle (which would only probably solve the hill problem) is there anything else?

Sometimes I feel faster going 1/3 than WOT.