fourload
TY 4 Stroke Master
Anybody using the Yamaha silver secondary spring in their Nytro in the search for a little more top end? I had one laying around put it in my NYTRO wrapped @80 and it seems to work well with the stock clutching. Slightly less backshift then the white @ 80 but seems to have gained a couple mph . Now 105 vs 102-103 with the white on the speedo in back to back 1 mile lake runs! Also seems to cure the stock over rev. Now comes out @ about 8500 and revs to 8850 on the top end. With the white spring it would come out @ about 9100 and settle back to 900o.
