My 250 big red with 300 fourtrax motor

[oscarmayer]

^ ahh ok cool.

[TheRealFatShady]

Love the tires on that TRX. The Big Red looks great, nice snorkel.

I'm hoping to get the 4 valve head done real soon, just had some stripped threads repaired and custom studs made....was going to get modeling clay on it with a machinist tonight, but 4' of snow on the ground means it's not getting out of my shed for awhile....need my bobcat or a snowblower to clear a path first.

[Highlifter]

therealfatshady bout time i see you on here lol, thanks man the gr is coming out of that trx and into my red lol, i will prolly have to cut down the output shaft from where it sticks out the bearing i think we discussed that but i think i can make it work

[TheRealFatShady]

My only fear doing that is that the end of the output shaft (where it sticks out near clutch) would be a giant hollow hole if you cut it, as opposed to just the smaller hole on the end for the oil feed line. Know what I mean?

IF I ever get my Big Red back together, I will definitely get a GR. Already have a few spare 300ex engines for the parts for it. My 250sx is real fun in the snow, but I'd like a little more bottom end and larger tires, which will go on my Big Red.

[TheRealFatShady]

Update on the 4 valve head swap

Studs were 3/4" too short, 2 valve top end uses 7 bolts, only 4 on the 4 valve top end.
Piston doesn't touch valves, doesn't come within .050" of it. Apparently on the 250 engine it does and needs valve reliefs cut out of piston, but I think it's due to the 300 motor having a longer stroke. Looks like it will be good to go, just need some top end gaskets now.

Alread have the 250 output shaft in the 300 engine, and I have the wiring for it. And have a 250x carb (had to cut some length off choke lever to work) that is on my SX now. So that will go in the 4 valve 300sx.

And the 480r project is coming along, got it partially mocked up. Need a few more mounts, and two spacers on the swingarm, but the chain alignment looked good, got new bearings for the swingarm, got the engine to fit in the frame properly.......hopefully it will be ride-able within a week. Then stripped for powder.