I'm not sure what you're talking about, I bought the All Balls kit made for the 400ex and put all of the pieces in and it worked. i tried to find it on the net but cant find the exact measurements, ill call service honda tomorrow and confirm it and post the measurements they tell me The old 450 and 400 are the same length, the 06+ 450 are longer. i just dont see going through all the trouble when there are easier solutions to the problem you asked for opinions so i gave mine, if you dont want to get opinions you wont agree with maybe you shouldnt ask for them at all. is it really worth it when u can just buy an aftermarket lsr extended swinger that bolts right up using your factory carrier for like $200-$250, even a used one is stronger then a factory 450r swinger and they are guaranteed for life against bends or breaks even if your not the original owner, you just send it back. and if you dont put the spacers in all your doing is messing up your drive, you said you spent $284 on all the 450 stuff, plus you will prob have to spend another $100 on chain and sprockets, take that cost plus all the time its gonna take to space everything out and install. Im not negative at all and hardly clueless, without a bunch of modifications theres no reason to go through all the trouble to put a 450 swinger on a 400ex. The 400ex swinger is shorter than ANY 450r swinger.that includes the old 450r swingers as well. You must be clueless or just all around negative.

05 honda 400ex swingarm