Herr Jugs Racing has a Trinity 265cc big bore blaster for sale and some big bore kits...Take a look>>> BBK>> Yamaha Blaster | herrjugsracing.com 265 blaster>>>> Used For Sale | herrjugsracing.com
There's a 265 kit for sale on ebay as well right now for 599
Blaster 73mm 265cc Big Bore Kit Cylinder and Head Mod | eBay
What was the biggest bore kit for the Blaster? Wasn't it a Trinity 290cc Kit or something rediculous like that?
Displacement of a cylinder =
V = πR²H
V = 3.14 x (73/2)² x 63
V = 3.14 x 36.5² x 63
V = 3.14 x 1332.25 x 63
V = 263545.695
Move the decimal point three places to the left and you're left with 263.5cc's with a 73mm bore and a +6 stroke.
In order to get a 285cc engine with a +6 stroker crank, you need a 76mm bore. You can imagine jumping 10mm in bore size from stock with ever decreasing amounts of aluminum to take away that heat. Sure, it can be done but to what end? Plus, the cases have to be bored out to accept that sleeve. Once you've done that to a set of cases, you've got to stick with it because then there's no aluminum behind a regular sleeve to support it...
285cc's:
V = 3.14 x 38² x 63
V= 285.652
Add that to the fact that +6 stroker cranks are exceedingly rare and only exist (thanks Chutzell for this nugget of info) because the crank manufacturing facility Vito's was first using screwed up and didn't take into consideration that a 3mm stroker crank only need the pin offset 1.5mm, not 3mm.
i looked at all that very technical info...posted by "the mrs."
and almost replied......."thanx james"
sumthin told me that was you