I put my first mile on my yz250f 300 gasgas swap bike!!!

[eff]

Looks like you need to find an 18" rear wheel now. Nice work.

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[Harry]

Nice work, I love these type of builds. More photos please.

[Kbowen4]

Well today at work I ripped most of a fingernail off and then rolled my ankle quite hard shortly after. We'll see if I can wobble my way to the garage tomorrow for more pics because tonight I can barely walk

[Kbowen4]

While I sit inside and stare ate the garage wishing my foot wasn't swollen here is a pic I took before cutting off the stock yz250f engine mounts. The pipe flange almost fits through there even though the mounts are holding it about 2 inches higher than it should be. One thing that I didn't mention is that I choose to cut the swingarm down to match the engine so that I don't damage my 300 block just in case the whole frame thing did not work out. So the spacer between the two swingarm roller bearings was taken out and I put the roller bearings closer together to make the gap between the swingarm about 12 millimeters Wider total.

[CanGasser]

Did you get a chance to weigh this yet?

[Kbowen4]

Well hopefully tonight I can get this rubber air boot seated into the air box properly tried to do it last night and thought about burning the air boot after fiddling with it for about an hour. Looks like I'm going to have to grind part of the frame off for the YZ250 air boot to fit around the shock area. I found a member of another Forum that did the same thing and it almost looked like it was like that from the Factory. Hopefully I can get the air boot sorted out tonight so that if the weather cooperates on Sunday I can take it for a real ride and report back and hopefully power wash it so I can get some nice shiny pictures up.

[Neil E.]

It's normal to have to heat the airbox boot with a heat gun to make it fit on a GasGas. It's probably even more necessary on your setup.

[Kbowen4]

Well I got the yz250(not 250f) airboot to fit with some grinding to the frame. Made the Reed side carb boot just a hair longer using a car gas filler neck tube cut to the right size. Took it for a bit longer ride today. It feels like a yz250 with a better engine (go figure). The suspension is a little less plush than the gasser stuff but with much better bottoming resistance. Tomorrow I will be putting a few hours on it and cleaning it up for pictures after. Makes me wish I was a better rider to really utilize this beast.
On a side note I absolutely love the light clutch pull on these bikes.

[Kbowen4]

Going to try to get a weight before the weekend is over

[john r b]

Great work !!!