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The Vintage Japanese Motorcycle Owners Group: Discussion Forums

Vintage Japanese Motorcycle Owners Group :: View topic - Porting GT380?


Porting GT380?

 
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ottar88
Welcome New Member
Welcome New Member


Joined: Dec 18, 2007
Posts: 2
Location: Norway
PostPosted: Tue Dec 18, 2007 3:53 am    Post subject: Porting GT380? Reply with quote
I have a GT380 bored to 56mm (400cc)
Would like to port it for more power.
Anyone have some good porting info? Porting info for GT250 will also work.
Also interested in some good aftermarket pipes, or meassurements to build my own.
Thanx
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crazypj
Weekend Warrior
Weekend Warrior


Joined: Jan 12, 2008
Posts: 72
Location: Altamonte Springs Florida
PostPosted: Sun Jan 13, 2008 8:31 pm    Post subject: Reply with quote
I don't know if Barton Engineering are still in business but they did a water cooled 500cc conversion for GT380 in the mid~late 70's.


PJ
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DGFISCHER
Weekend Warrior
Weekend Warrior


Joined: Jan 16, 2008
Posts: 9
Location: Manchester, MD
PostPosted: Thu Jan 17, 2008 8:22 am    Post subject: Reply with quote
Some of the older Clymer and Haynes manuals have a "Hi Performance" section in the back showing port maps and expansion chamber dimensions.
DG
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