My 89 engine needs rebuilt.....

Post by **AlisoBob** » January 10th, 2012, 8:24 pm

Like I said.... Lots of oil (32:1).... run it.

blownbillybob · Post by **blownbillybob** » January 11th, 2012, 6:51 am

Dude that thing is CHERRY!!! Now stop stressin!! On the crank and pay attention to da top end !!!!

Tharrell · Post by **Tharrell** » January 11th, 2012, 11:00 am

What was the original failure, seized I presume?
Did you get a read on why the original failure happened?
btw-No offense but you seem really worried about the rod.
I would run it as is but maybe you need to get some peace of mind and rebuild the crank.

Doppler · Post by **Doppler** » January 11th, 2012, 12:40 pm

Yeah it got hot and seized. I was cruising down a dirt road. All of a sudden it bogged down and lost power and shut down. Rear wheel did not lock up.

The head nuts were barely more than hand tight when i tore it down. Hardly took any pressure to loosen with a wrench. Somehow they came loose and it started burning water and/or sucking air. Or it got so hot some other way that they came loose or things warped. Not really sure. I need to check for warpage but ive been busy lately.

The only reason i was woried about the rod is because of the specs. I figured a picture may help but apparently honda specs mean nothing. I guess i shouldnt ever check the specs on anything anymore right?

Post by **AlisoBob** » January 11th, 2012, 1:50 pm

Some shit you can fudge on... rod side clearence is one of them.

Tharrell · Post by **Tharrell** » January 12th, 2012, 2:44 am

Naw man, I know what it's like.
I do the same thing sometimes, just for peace of mind.
I'm waiting to put my top end back on because I don't know how old the crank bearings are on my '85.
I'm doing it up with paint and all so if I take it apart to replace those it will probably be a loooong time before it comes apart again.
I think it's kinda an anxiety thing

Like Bob said, you can fudge some things but if it bothers you, do something about it.
One of my things is, I ALWAYS change out the piston pin, bearing and clips when I do a top end. Just a weird thing I do for peace of mind.
Another, I ALWAYS replace the top end on a bike I know nothing about, specially a 500.
My piston was good in the '85 but, I replaced it for peace of mind.
Peace of mind is worth more than the cost of the repair to me.

2strokeforever · Post by **2strokeforever** » January 12th, 2012, 11:49 am

Peace of mind is worth more than the cost of the repair to me

X2
thats why i rebuilt my bottom end twice when it was still in spec

also if the rod does bend, snap and take the cases out its gonna cost a lot more, and downtime sucks

Doppler · Post by **Doppler** » January 30th, 2012, 6:00 pm

Ouch! What do I do with the cases? Looks like the rod got into them maybe? Other half is the same way
DAMN!!

Kuma · Post by **Kuma** » January 30th, 2012, 7:02 pm

Stroker Motor

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » January 31st, 2012, 5:45 am

Usually if they're pushed out like that they'll also have a crack and run lean. I'd check them very close.
I surface the cases if needed, ones that have that damage almost always do, the edge rolled back leaves it high by a bit and it won't seal everywhere.

Doppler · Post by **Doppler** » January 31st, 2012, 7:20 am

well that doesn't sound good....
Is there a way to fix them? What if I find no cracks?

freeride588 · Post by **freeride588** » January 31st, 2012, 8:40 am

Doppler wrote:well that doesn't sound good....
Is there a way to fix them? What if I find no cracks?

I think Roostius was saying that if there are no cracks he can clean up the mating surfaces to make them seal properly.

blownbillybob · Post by **blownbillybob** » January 31st, 2012, 9:17 am

You can surface them flat !!
If they have cracks you can weld them up and surface them!!

I've done two cases like that with cracks and no problems!!!

http://www.youtube.com/user/500bigbore · Post by **Roostius_Maximus** » January 31st, 2012, 9:22 am

weld em up!
I've bought cases that shit the rod out and were missing a square inch, you'd never know it now

blownbillybob · Post by **blownbillybob** » January 31st, 2012, 10:17 am

You can surface them flat !!
If they have cracks you can weld them up and surface them!!

I've done two cases like that with cracks and no problems!!!

asteroid500 · Post by **asteroid500** » January 31st, 2012, 11:08 pm

Yeh boB ... my mums a hooker!

BannedCR500Riders.com

My 89 engine needs rebuilt.....