HIGH PERFORMANCE HEAD for sx

[orchie18]

any word on these heads theres a guy here with one for sale for 100 buck...any major hp gains?

http://www.mountainperformance.com/yamaha_engine_mods.htm

 

[s fortuna]

I Got One . It Will Make It Snappy / Pull Harder

 

[backwoods]

if you don't buy it let me know....

 

[orchie18]

so i take it they work good, i will let you know for sure. do they require any different jetting. im looking to do pipes and what not eventually. do they perform well with other mods? i would need to but another dome...one is missing...going to hopfully find out why?