Stock 70 pipe on GPX?

vegatron75

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Joined Jul 8, 2006

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Discussion starter · #1 · Dec 30, 2006

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IS my stock xr70 pipe choking my gpx?



I'd like to get the crower cam but, if the exhaust is too restrictive than the cam probably won't make much difference.

 

Kurlon

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Joined Feb 23, 2005

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#2 · Dec 30, 2006

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I found 1hp on a 5hp 72cc motor with a pipe and carb change... so yeah, the pipe is going to be holding your 125 back some.

 

RcWannabe

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Joined May 3, 2006

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#3 · Dec 30, 2006

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If you haven,t already you should do the exhaust pipe mod from here

www.50mods.com

 

T Bolt USA

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#4 · Dec 31, 2006

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we have a few buget units that will work well with the gpx

 

M

melloyello

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#5 · Dec 31, 2006

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You need to upgrade for sure. Anything over a 88 or 95cc and a FMF powercore will be holding you back. Go for the gusto and get the Ultima Classic.

 

A25MX

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#6 · Dec 31, 2006

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I have a stock 70 pipe on my GPX and it seems to have good bottom end but it lacks on the top end but I dont use it anyway. I'll have to wait and see if I can test another pipe on there to see what kind of difference it will make.