400ex motor on a 250r

[crewworrior]

Im going to put a 400ex motor on a 250r had anyone done this and what kind of trouble did you go through any advice would be greatly appreciated
THANKS

[Honda TRX250ex]

it probly wont fit. crroecte me if im wong but the 400ex engine it to big

[stc416rider]

Originally posted by Honda TRX250ex
it probly wont fit. crroecte me if im wong but the 400ex engine it to big
thats what i was thinkin try a searh

[crewworrior]

people put all kinds of dirtbike 426 450's on 250r's i think i will fit

[ZeroLogic]

Originally posted by crewworrior
people put all kinds of dirtbike 426 450's on 250r's i think i will fit

Your thinking of 400ex frames. The 250r frames are smaller at the top portion. I don't think it will fit.:ermm:

[ride_red666]

what would the point be in putting to ex motor in there if the 250r is already a awesome motor? but i dont think there will be enuf clearance at the top of the frame for the beefier motor.

[Honda TRX250ex]

yzf 400

[crewworrior]

The point is i do alot of hill climbing and my 250r's power band is very unpredictable a 400ex motor would be better in the woods and easier to control climbing hills

[ZeroLogic]

You could try to sell it to buy a 400ex or trade your 250r for a 400ex. But if you do that I would get the z400. It's updated reliable and quicker.

[crewworrior]

Ive tried to trade my r for a 400 on here and didnt get not one reply so i just took it off, my r is fast and in good shape, i guess noone likes r's better than their 400ex's

[xx3003xrdrxx]

haha , id take any R over a 400ex.

[crewworrior]

The reason iwant a400 motor on my r is because my r sits low and i feel comfortable on any terrain i never feel like its gonna tip on me.

[deathman53]

it probably will fit, for years 350x motors were put in r's, leager even made a 250r/350x chassis at one time, it sold big too. Why not put a 330 in the r and have it ported for low end and use a low end pipe, it will have simailr torque to a 400ex.

[Tom TRX250R]

You can make an R motor an excellent woods motor. Just have it ported for low end, get a matching pipe like ESR TRX6 or Paul Turner type 6 pipe, and a 36mm carb and it would be an excellent choice for low end just like you want for the woods. Believe me once you do that you won't want a 400ex motor.

[crewworrior]

how much is a 330 kit and who has the best one for the money

[deathman53]

esr, but their porting isn't real great.

[crewworrior]

who does porting thats good

[xx3003xrdrxx]

Mark Baldwin , Baldwin Motorsports. He has been doing it forever , they built all of Timmy's 250r's.

[crewworrior]

thanks ill look in to it soon