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Big bore kits gs450

  • Thread starter Thread starter TyFerris
  • Start date Start date
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr. TyFerris,

I don't think there's any such thing as a big bore kit for a 450. If you've got the skill I suppose you could put in a pair of GS500 pistons. The motors are very similar. But for all the expense and time, I think it would be cheaper and easier just to buy a bigger bike.

Anyway, let me dump a TON if information on you and share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
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If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
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Please click here for your mega-welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

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Well, how brave are you ?

http://www.thegsresources.com/_forum/showthread.php?t=172422


More info:
http://www.thegsresources.com/_forum/showthread.php?t=170287



After 1980 i believe the gs400 425, 450, 500 have the same base engine and only change the cylinder block and head. Before 1980 the block had roller bearings and the head configuration doesn't line up properly with anything after 1980.

If you bore your cylinders from 71mm to 74mm that would make it a 486cc.

75mm would make it a 500cc and you would only have 2 mm sidewall left.

I'm assuming that you have a 4mm sidewall when the bore is stock at 71mm.


Big bore kits for 750's can be applied to the twins if you can find them.

http://gszone.biz/pistons.html

The gs4xx piston's have an 18mm wrist pin.

The 1100's have more options for pistons but I'm not sure how the valve recesses would compare and they might require modification.


Cometic makes 450 head gaskets in what ever size bore you want starting at $48 for felt type and $57 for copper reusable gasket.

http://cometic.com/powersports.aspx nothing on the website but if you call them they do have stuff available in their database


It is possible, not cheap, Performance would increase, but would it be enough to satisfy?


Oh one more thing :lol:, It has been done :eek:

http://www.youtube.com/watch?v=tQEVHd1cSyw


Its a 450 with a 500 cylinder block bored to hold GR650 pistons. That makes it a 527. I think the head is from a 500 but i can be sure which year.
 
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