Just bought my bran new 2004 WR450F last week. So far has 115 miles I have put on it. I have done the throttle stop mod, removed the air box snorkle and removed the exhaust baffle. Runs pretty hard. But I want to go full power with this motor. If I have the 2004 YZ450F cam installed will my decompression work and will I be able to still use my electric start? I'm all new at this and full of questions about this bike. How much is a 2004 YZ450F exhaust cam and where could I get one for a good price? I'd appreciate any info on this. Thanks..