So I just bought a 99 F4 and the bike ran fine. The bike has about 14k miles, clean title, starts great, and runs good. Got a great deal until I realized that I got screwed when I went to change the oil. I knew that the oil was low, so I added some and started the engine up. The engine starts to leak the oil in a good amount. I took off the fairings and realized there were two holes about the size of a penny on the crank case right behind the alternator cover?
I think the bike should be ok riding it short distances, because it still has oil in it, but for now I drained the oil and it's sitting in my garage.

But I realized that I shouldn't JB weld it, and I can't grind a hole and put a bolt in the holes, because the gears are close to the holes. I realized that I have to get a new casing or a new engine.

What I'm asking is......I saw a 2001 F4i engine case on eBay, will this work with the F4? My other option is to buy a used F4 engine for about $250 and have someone replace it. Which is more cheap? Which one is better? How long or how much for the replacement work done by a shop?

Holy, freakn, WOW!!! You just bought it?? Id call the previous owner. I dont know what that would accomplish, but he would get a helluva cussing from me!!!! It would be easier and probably cheaper to get a used engine and put your carbs and stuff onto the "new" engine!! man that sucks bro!

Welcome BTW!!

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1998 CBR F3 R.I.P.
2004 zx6r R.I.P.

I would find a small shop to do it and hopefully save some coin. I would probably go with the engine as who knows how much that thing has been rode without alot of oil. I dunno but I would go to old boys house and whooop his azz.

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Because chicks love the beads
2001 CBR 600

yea get a new motor to put in it. it might have more damage to it then you can see from the outside. a motor swap isnt that hard of a change if you are good with tools at all. i need a motor swap in my bike when i got because the previous owner throw a rod threw the casing. took about a day and half to do and just threw the old carbs and everything back on with it.

I'd take it back to the bitch ass mother@#$%#. He had to know it was spewing oil!!! If he don't give your $$ back, put some lumps on him!!!!

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2007 CBR 600RR Two bros. C/F slip on--Dynojet usb P/C--Custom mapped--Vortex sprocket -1 front+2 rear--DID X-ring chain--hh pads --Pilot power rubber--competition werkes F/E. Oem blue solo seat cowl and no rear bitch pegs!(no offense to any bitches meant)

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Because chicks love the beads
2001 CBR 600

Yep, what I was thinking. Leave some popknots on that head of his!!!!

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1998 CBR F3 R.I.P.
2004 zx6r R.I.P.

I would employ legal council and get your money back on the bike

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LOL this is the best option!!! but leaving popknots makes you feel better!!!

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1998 CBR F3 R.I.P.
2004 zx6r R.I.P.