It should be relatively easy to add a reed valve to that motor. Possibly one of the old Pabatco 100cc kits could be adapted. A 22 to 24mm Mikuni would be just right. A custom trials exhaust would be the finishing touch. Then this bike would pull down low like the TY175 that snuck into the video. I built my first Hodaka trials bike in 1974. Then in 1994 I built a replica of that bike and competed in AHRMA and STRA events in the Southeast.
Beautifull vintage trials another great dirt bike heaven for heavenly people that live a god like existence is all dirtbikes from motocross to enduro to speedway to short cercuit racing its what brought the people together from all races and motorcycling brands from europe to japan to canada to america vintage dirtbiking is heaven on a 1970s twin shocker aircooled fin two strokers made a sound like music and a smell like heaven from vegetable oil mixed two stroke racing oil shell M motor oil a clear cooking oil is healthy dirt biking and shell A racing fuel for speedway bikes like ethanol is healthy race bike fuel for healthy people who do not like the toxicity of todays fuels that we healthy people do not want to breathe in the toxicity of nicotene smoke or gunga smoke or alcahol and we know who the healthy people are who are into fitness like our vintage motocross riders of old the spanish bikes with amal carburetors smelt good and the mikuni carbs and lectron carbs all were enviromentally friendly not like these days its toxic chemicals that are dangerous to our healths
