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Discussion Starter · #1 ·
Hi, I am going to be installing a 480 big bore kit with a 12:1 compression piston on my 2007 450er. I already have the green wire mod, HRC cam, and a HRC header with a big gun silencer I cut down to make a shorty exhaust. The elevation where I live is about 600ft above sea level.

Thanks for any help in advance.
 

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58 Posts
Discussion Starter · #2 ·
Hi, I am going to be installing a 480 big bore kit with a 12:1 compression piston on my 2007 450er. I already have the green wire mod, HRC cam, and a HRC header with a big gun silencer I cut down to make a shorty exhaust. The elevation where I live is about 600ft above sea level.

Thanks for any help in advance.
Anybody know anything? Any help would be appreciated.
 

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2014 trx450er
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When I was running just a hc1 cam, open air box, full exhaust, I was at a 180 main, and a 52 pilot jet. Now my set up is a 520 big bore stroker running a hc3 cam, got a 205 main and a 55 pilot, I am also running 110. This is about at 950 elevation. I would say some where in the middle of that area.
 

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Discussion Starter · #4 ·
When I was running just a hc1 cam, open air box, full exhaust, I was at a 180 main, and a 52 pilot jet. Now my set up is a 520 big bore stroker running a hc3 cam, got a 205 main and a 55 pilot, I am also running 110. This is about at 950 elevation. I would say some where in the middle of that area.
Thanks for the help!
 

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Truck Yea
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185-195 main should do it. start high and adjust down

your gonna want a web or hotcam 3 geared for a big bore
 
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