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YZ490 Blaster Build started
- Hank751
- Thread
- yz490 500 swap
- Replies: 16
- Forum: Engine Mods and Swaps
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Blaster keeps blowing topend
Bought an 01 blaster went through 2 top ends in 2 weeks. Mixing 32:1 with klotz Jets- 40 pilot 4th clip on needle 270 main Fmf pipe, head was milled .035 before last rebuild. Had not even a tank of gas ran through before it completely fried the piston. Putting a new bottom end in to make sure...