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Discussion Starter #1 (Edited)
Ok all you Yosh Pipe fans here are the gains of installing a Yosh to a 400ex. This 400 is my nephews who wanted me to do some work on it for him, along with myself learning and doing some posts of what good some of the bolt on hop ups will gain. It has a ported head with a stage 2 hot cam for other hop ups and was a stock pipe till now. Here are the results of the hp and tourqe. The gains are not what i expected. Click on the link for a better pic of the dyno sheet. The pipe actually caused a loss of TQ. The blue was stock pipe and red line is the yosh. http://www.hondaatvforums.net/forums/attachment.php?attachmentid=396&stc=1&d=1266547961
 

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I'll keep my unfinished dual exhausts.ROFL!!!!
 

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I have read a review some whereon yosh exhaust on a 400ex. They said the yosh exhaust was basically a dissapointment. If I remember right the white Bro's and Curtis Sparks done well.
 

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Curtis sparks does well on all honda's.
 

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Pm 300 he probably can give you all the H.P. specs and speeds for all the pipes listed here.
 

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Discussion Starter #9
I have heard similar things as well, I would like to try other exhausts on his bike and see what others make good power. I do believe that sparks and white bros are better pipes, so i have heard as well. This is exactly what I was talking about in an earlier post on comparing pipes, just because its a well known brand doesnt mean its the best!
 

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Well it sucks that white brothers went under though.
 
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