GL1200 Big Bore Kit??


Technical information and Q&A applicable to all years and models of Goldwings
  • Sponsored Links
jasonb4674
Posts: 1
Joined: Tue Jan 26, 2010 4:27 pm
Location: Phoenix, AZ
Motorcycle: 1984 GL1200A Goldwing Aspencade

GL1200 Big Bore Kit??

Postby jasonb4674 » Tue Feb 02, 2010 4:26 am



Anyone know if they make a kit to bump up a 1200 to a 1500? I heard about someone doing this but am not sure if they were just telling stories or did they really do it. Thanks for any tips!



User avatar
WingAdmin
Site Admin
Posts: 17046
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: GL1200 Big Bore Kit??

Postby WingAdmin » Tue Feb 02, 2010 10:24 am

Never heard of such a thing. You'd have to add 75 cc to each of the four cylinders in order to do that - that's an awful lot of displacement to add. You could get a little bit by boring, but there's not much you can do with that aluminum block and the thin walls. So you're left with lengthening the stroke, which means machining a new crank. Even with that, I don't know that you'd get 75 cc out of it.

I've never heard of such a kit, and I kind of doubt that such a thing is physically possible.

If you want 1500cc, I think you're better off buying a GL1500. :)


Return to “Tech Talk”




Who is online

Users browsing this forum: Bing [Bot], chrisz and 1 guest