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gaukel350x
10-15-2007, 10:31 PM
There's a guy on craigslist of sandiego with a 1985 350x and he says its made to a 425. If that's possible and if anyone knows how to do it hit me with all the info you guys have. Cause that would be my next project.
NINJA
10-15-2007, 10:43 PM
Yes, I've seen 425s stuffed into trx250rs for mx. I think it was Duncan Racing that sells the kit, but I can't remember exactly.
jeffatc250r
10-15-2007, 11:01 PM
Are you talking a big bore kit for the 350 motor? That sounds like it could get pretty pricey, maybee a 450r motor conversion would be around the same $$ and be much more reliable, that is if your into fabricating.
gaukel350x
10-15-2007, 11:16 PM
I don't know it just says 425
About how much would it cost to do the bore?
I know a guy on this site put a 450 engine into a 350x and how much did that cost him?
That would be my dream, I would destroy all my friends quads.
Black86tri-z
10-15-2007, 11:28 PM
its probely got a POWERROLL stroaker kit in it,google it
jeffatc250r
10-16-2007, 12:10 AM
The cost is obviously going to differ from person to person. All depends how much you can pick a motor up for, and if you are able to do the mods yourself.
gaukel350x
10-16-2007, 12:22 AM
The only prolbem is getting the engine the fabing is no prolbem at all
Would you get the engine new or used?
Is there a link to any info on this motorswap?
jeffatc250r
10-16-2007, 12:25 AM
Its your bike, you decide if you want a new one or not!
jason 32
10-16-2007, 10:02 PM
just put in a xr600 and be done with it- wont over heat-,and there are a ton of parts for the xr's
gaukel350x
10-17-2007, 01:34 PM
Ya I don't know if the xr600 engine would fit, a little bit to big
NINJA
10-17-2007, 07:43 PM
its probely got a POWERROLL stroaker kit in it,google it

That's the one. My mistake:cry:
SWIGIN
10-17-2007, 09:03 PM
i know a early 80s xr500 sleeve and piston (89mm) with a 6mm crank will make a 350x into a 460cc

thats the easyest and cheapest way to go since you can use all the xr500 overbore pistons
gaukel350x
10-17-2007, 09:12 PM
Do you know anyone who did that?
Cause if it will work good I will probably do it. The problem would bejust finding the parts in good condish. Well the piston and sleeve I could buy new right? Where could I find a crank?
SWIGIN
10-17-2007, 10:09 PM
my buddy has one...its a great motor powroll does the crank and they sell sleeves too