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PostPosted: Tue Sep 11, 2018 2:44 pm 
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Around the block

Joined: Thu Aug 02, 2018 9:15 am
Posts: 51
Location: Clarksville
Country: Tennessee
Bikes owned: 73 GT750, 75 GT750, HD Road Glide
Hello family, in the GT750 manual it list changing the exhaust from the older set with exhaust coupler to the newer model without the couplers for added hp. I am in the process of changing out but the mounting points are a little different. Has anyone out there made the switch and what modifications did you make in order to complete the process. Thanks in advance. :up:


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PostPosted: Tue Sep 11, 2018 11:32 pm 
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World Superbike
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Joined: Thu Feb 16, 2012 11:50 am
Posts: 2172
Location: The Republic of South Yorkshire
Country: England
Bikes owned: GT550s GT750 GSX1400 and lots of spares
The mountings are different and you won't notice a power increase anyway. Later bikes had different porting/carburation etc. THAT made the difference.


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PostPosted: Wed Sep 12, 2018 11:57 am 
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Moto GP
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Joined: Mon Nov 03, 2008 10:47 am
Posts: 6008
Location: Illinois
I wouldn't bother with OEM pipes - nice and quiet but they restrict power.

Depending on your budget, raise and widen the exhaust ports and leave the inlet ports alone and/or add a set of decent pipes. Jemco are good and cost effective. Their 3 into 1 is also light and sounds even better than their regular individual chambers.


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PostPosted: Thu Sep 13, 2018 12:32 pm 
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Around the block

Joined: Thu Aug 02, 2018 9:15 am
Posts: 51
Location: Clarksville
Country: Tennessee
Bikes owned: 73 GT750, 75 GT750, HD Road Glide
I'm getting ready to have crankshaft seals replaced over the winter so please provide me the dimensions for the exhaust porting. I would love to get some extra power that's streetable for next year riding season. Thanks.


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