I give up

[la400ex]

I just took my 416 out. I was still breaking it in and the rod broke. I need a new engine. Anybody selling one?? Thanks, Anthony

[Big - D Racing]

What compression were you running and what type of piston?

[la400ex]

10.8:1 ross. Not enough compression to throw a rod.

[Big - D Racing]

you had to have some kind of manufacturer problem with the rod. Check with your honda dealer for a warranty.

[la400ex]

I dont know what it was. I might just save and save and save and buy a yz 426 motor to put in it. It might be a year before that happens but thats what I want to do. Im gonna take some picks tomorrow. Its depressing. Cracked the mount for the starter, and has a huge hole in the top of the cases. I got home and we had it tore down in a little over an hour. I had to see what happened.

[forum]

what is left of the engine that can be reused?

[luvmyex]

That really sucks man.Im putting in the same thing you have.I hope i dont have any problems.Did you check to see if there was any play in the rod while it was apart?

[la400ex]

You shouldnt have any problems. A lot of people run that setup with either a ross or a je piston. You will love it.

The head is good, just needs new valves. The valve cover is good. The right case where the clutch is, is good. I dont know about the botton end. I know i would need a new rod but i dont know if the crank is bent or anything. I dont know if it would be worth it to try to rebuild the whole thing. I would need new cases, probably a lot of parts in the bottom end, a new cylinder, new piston, new rod and that might be it. Man, im depressed.

[forum]

well maybe your best bet is to buy a whole engine. that way you'll have extra parts. I sold mine for around $700. look around on ebay and stuff. Hey man sorry to hear it. but don't worry about it. chit happens. I felt the same way every time i blew my 250r. But remmebr when you make internal motor mods theres always a risk

[motoboy66]

I did the same thing to my CR500R. My bottom end rod bearings blew apart, and the rod busted out the bottom of the casses, in the middle of a race no less. Anyway after pricing all the parts i ended up buying a new crank, same cost as having my old one rebuilt. The case halfs I gave to my neighbor, a profesional welder. He ground out all the bad aluminum and build it back up with weld bead. When I got them back, I used a di-grinder to clean them up, and then used a diamond router bit on a drill press to machine the case meeting edges. I finshed them up with valve lapping compound on a glass surface to get them realy smooth. I then reassembled as if the were brand new parts, I did replace a few bearings and seals. It worked out realy well. I used the bike for another 2 years befor i sold it. It has been four years since this happened with no proublems. I did the same thing to my buddies ATC250R as well. Totla cost was around $400.

Your mottor might be worth fixing, give you a chance to rebuild your crank with a stronger rod. Or if not I might be interested in buying your remains of an engine. Sorry to hear about your bad luck. I know when my engine let go it was one of the worst feelings.