300ex qustions.Need tips/tricks also!

[jarfly]

Ok I deleated my old post cause it was very vage on what I need to know.
I have some qustions about a 94 300ex I picked up for 400 bucks.
I have been bord out to 330cc's. Needs piston.
I dont care much about the elct start(it dont have a starter at the moment.) I want to do away with it and go kick start but still want lights I do a lot of night ridein and I dont want theme to dem out like my old shee did.
So heres my qustion.
1.Could I use a 250x bottom end? and use my 330 head? if so will it still be a 330cc engine? I was goin to do a stock 350x engin swap but the 330 should be just as good should't it?
2.If i use a 250x bottom end and the ex head I should't need custom header pipe?
3.400ex arms? are they wider? and on shocks what would I need to put 400ex shocks on?
4.swing arm? could I use a 400ex swing? or what is a good cheap swing arm?
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Thanks for the help and if you have any info/tips on any thing I would like em

[honda300EXtreme]

ok let me try to help you out


1. a 330 (80mm bore) on a 250x bottom end does not equal 330 cc's because the 250x has a shorter stroke then the 300ex, but if i recall correctly, the 300ex and the 250x pistons do not interchange because if different wrist pin diameters, but im not positive

2. no you will not need a custom header, simple as that

3.400ex a-arms are about 3 inches wider i belive, and you need to run a shock relocator bracket, which will allow you to run a variety of shocks, and youll also need 400ex tie- rods

4. i tried a 400ex swing arm it was a pain in the ***, the 450r swingarm will work but you need to mount a bracket on the frame, to accept the linkage for the new shock you will need



hope this helps

[Dr89]

^^^ everything he said.

i'll only add that if you have the means to properly do a 350x engine conversion you'd be a lot better off than you will be with your 330....it will be quite a bit more powerful. you will need a custom exhaust for that. oh and just replacing the starter would be a lot easier and more convenient than going to a kick start...they're only like 30 bucks or so.

[2muchquad]

The 250x and 300ex have the same wrist pin diameters.You could use the 300ex piston in a 250x for slightly lower compression because of the wrist pin location.A 250x piston in a 300ex will have higher compression.The wrist pin locations are slightly different because of the 250x and 300ex have different strokes and rod lengths;) Heads cams exhaust etc will all interchange though