replacement DOPPLER tension spring

doppler's new WHITE ultra soft engine tension spring for all doppler spring setups!! this is better suited for 50cc high rpm setups than the stronger red and yellow springs!! really for the launch lever enthusiast that is going to be manually controlling variation most of the time.

works with these:
-peugeot 103 moped doppler engine tension spring
-motobecane av10 av7 moped doppler engine tension spring

treatland