I don't see very many of these and original Hodaka pistons are non existant as far as I know. Replacement Wiseco's do not have the intake side boost port.
Also, Wiseco recommends drilling two holes in the piston with a bridged exhaust port. Holes are drilled in the exhaust skirt centered on the exhaust port bridge .300 inch below bottom ring and .375 inch apart. Hole diameter recommended is .060 to .090 inch. I used a 1/16th inch drill bit which is .062 inch. I don't think I would recommend going any larger. Exhaust bridge on the 175 is not that wide and you need a little fudge factor if your measurements are off a little.
Danny
175 Piston Modifications
Re: 175 Piston Modifications
I did this exhaust bridge drilling just like you told me on the Red Toad! It’s working very well! Victor
1978 175SL
1976 03 Wombat
1975 99 Road Toad (2)
1973 96 Dirt Squirt (2)
1973 “Wombat Combat”
1973 Combat Wombat
1972 94 Wombat (2)
1972 Super Squirt
1971 92B+ Ace
1970 92B Ace 100B (2)
1968 92 Ace 100
1966 Ace 90
; D Victor
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