Uploaded June 2026 | Updated September 2026, 3 days ago
In this video I bought a 1970 Yamaha HS1 90 cc twin to rebuild keeping as many original serviceable parts as possible. Parts for these 90cc twins are becoming rare and hard to find in the UK as these bikes were not sold in the UK when new, The engine is slightly different in design to the similar looking YL1 100cc twin.
In this video I bought a 1970 Yamaha HS1 90 cc twin to rebuild keeping as many original serviceable parts as possible. Parts for these 90cc twins are becoming rare and hard to find in the UK as these bikes were not sold in the UK when new, The engine is slightly different in design to the similar looking YL1 100cc twin.
