I'm convinced that for what most people want to do a standard bore kit from Fundy is the way to go, they are making 15 to 20 hp more than most 840 kits.
840 Kits are held back by carbs, intakes, heads and exhaust kinda corking them up. Yes you get a nice gain but more can be had, less trouble and less money. Sure you can uncork it but heck then you got about $4000 tied up in the mod and you then will only barely outrun the standard bore kit.
Another issue with 840 kits are warped cylinders because they are so thin plus the heat.
When you can make a reliable 90 crank HP and 65 HP at wheels you are doing something.
We are going to install a Fundy standard bore kit in a 08 Teryx and get a good set up and then do a 09 and map it on the forth coming MSD ignition/fuel controller for those want to just plug and play when the MSD comes out.
I would have loved to do our own kit but Ray at Fundy is hard to beat so no need in beating a dead horse. Our part will be the set up on fuel and ignition, exhaust etc so you get a complete set up with no worry about compatibility issues and it just plain hauls butt!!
Todd
840 Kits are held back by carbs, intakes, heads and exhaust kinda corking them up. Yes you get a nice gain but more can be had, less trouble and less money. Sure you can uncork it but heck then you got about $4000 tied up in the mod and you then will only barely outrun the standard bore kit.
Another issue with 840 kits are warped cylinders because they are so thin plus the heat.
When you can make a reliable 90 crank HP and 65 HP at wheels you are doing something.
We are going to install a Fundy standard bore kit in a 08 Teryx and get a good set up and then do a 09 and map it on the forth coming MSD ignition/fuel controller for those want to just plug and play when the MSD comes out.
I would have loved to do our own kit but Ray at Fundy is hard to beat so no need in beating a dead horse. Our part will be the set up on fuel and ignition, exhaust etc so you get a complete set up with no worry about compatibility issues and it just plain hauls butt!!
Todd