hey i just bought a bottom end out of a 96 foreman(isnt that from the 400) do you think the 400 bottom end will fit in the 450 frame and will the 450 top end fit on there also how hard is it to rebuilt the bottom end compared to the top end cause now that ive done a fe times its not that hard.
I am not for sure about the the 95 model foreman 400 motor, but the output shalfs on a 98 foreman 400 motor are shorter than the 450 foreman output shalfs. you might have problems with the drive shalfs. I have a 450 motor in a 400 frame and had to change over to 450 driveshalfs for it to hook up. everything else will hook up fine as ctown said.
Dirty4man, you are right I totally forgot about the output shaft on the front and I shoulda remembered that since i'm about to install a 450 output shaft on my 400 since i have a spare 450 output shaft laying around. The 450 shaft sticks out about 2 inches more than the 400 shaft, meaning the 400 shaft is longer than the 450 shaft. I'll see if i can't get a picture of the shafts compared.
There have been debates on differences in the gears in a 400 and 450. Some say the 400 has lower gears (what I believe) and some say they are the same. We will find out this weekend when i tear down my 400 motor to replace the output shaft.
Also off topic but is there any difference in the 400 and 450 cam shaft?
Final reductions (ring gear & pinion) are different (400= 41/13 ) (450= 42/13 )
Tires are different:
400= front 24/8/11 -- rear 24/10/11
450= front 25/8/12 -- rear 25/10/12
I'm not sure which cam would be best because I don't know much about cam durations but this is the duration numbers:
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