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Author Topic: Engine trouble (from the main boards)  (Read 6581 times)
azure
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« Reply #15 on: December 09, 2010, 08:36:10 AM »

Treeve,

It looks like you're pointing to the valve cutouts on the tops of the pistons, but I can't see the damage there. In any case, it's not the pistons that'll be the problem here, it's the valve stems that get bent and wear the valve guides.

It seems like you're going to go for the rebuild at this point anyhow. We'll talk more this eve, but if you want, bring the cam, and the chain guide and tensioner, and we'll have us a little show n' tell!
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Alan F.
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« Reply #16 on: December 09, 2010, 10:36:32 AM »

Am I looking at the wrong thing or do you have two distinct types of pistons in there? It could be that a chain had let go, chewed the cover and tunnel, but a couple of pistons may have hit some valves too. Yhat'd explain the dipperent piston types.

I've got some K8 top end hardware too if you need anything else let me know. I think I have everything except the cam,  towers, and valvetrain....so rockers/shafts and nuts/bolts if you're in need.
Alan
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knowsnothing
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« Reply #17 on: December 09, 2010, 01:02:50 PM »

Andy you aren't trying to scare me off so you have the fastest 750 in the land are you??   Wink   Thanks for the heads up on cost.  The reason i was thinking about going bigger was because there is a 836 kit floating around ebay for about $145 shipped.  It includes pistons, rings, and gasket.

http://cgi.ebay.com/ebaymotors/69-77-HONDA-CB750K-PISTON-BIGBORE-65mm-SET-FOUR-/130421442768?pt=Motorcycles_Parts_Accessories&hash=item1e5db948d0

TerryfromAustralia bought one and said it was pretty solid quality.  The seller is currently sold out, but supposed to get another shipment mid Jan.  I was planning on getting one then, maybe even 2 at that price   Shocked Shocked  I already have a set of HD studs and a full gasket set from cycle X.  So with work from mreick and labor for block, i think maybe around $1000 to $1500??  Not too bad.  Plus Novartis will be picking up the tab  Wink  We can talk tonight Cheesy


Ben, I love a good show and tell!!  Consider it done!


Alan I have no idea what i may or may not need outside of a cover.  I would just hold on to what you have until i figure out what is good and what is trash.  Thanks for the offer and I may take you up in the future. 
« Last Edit: December 09, 2010, 03:26:39 PM by knowsnothing » Logged

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andy750
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« Reply #18 on: December 09, 2010, 02:09:26 PM »

Wow Treeve congratulations!!! We have much to talk about!!!

And yes your estimates for cost are about right for labour.

See you later
Andy
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knowsnothing
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« Reply #19 on: December 16, 2010, 12:15:40 AM »

Treeve 15 - Studs 1   Wink



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frostypuck
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« Reply #20 on: December 16, 2010, 07:08:03 AM »

Do you have any way to get some heat on it without burning the house down?
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azure
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« Reply #21 on: December 16, 2010, 08:19:40 AM »

You can try using one of the heat guns that painters use to scrape paint. I have one if you want to borrow it. However, you may need to use MAP gas if the hot air isn't enough.
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Alan F.
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« Reply #22 on: December 16, 2010, 08:29:31 AM »

If you decide you'll need a Mapp torch, I have one to lend and I'll be heading back up the expressway this evening... I'll PM my number just in case.
Alan
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knowsnothing
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« Reply #23 on: December 16, 2010, 11:42:37 AM »

Do you have any way to get some heat on it without burning the house down?


That would be a negative  Grin 

Thanks guys for the tips.  To this point i have only been soaking them, so heat will be my next step.  Alan thanks for the offer.  I pmed you back. 
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Alan F.
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« Reply #24 on: December 16, 2010, 09:59:29 PM »

Yeah Man, we've all got some help to offer when the need arises.
A
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« Reply #25 on: December 17, 2010, 03:50:30 PM »

Anyone have a rear crankcase cover they wouldn't mind selling.  I was planning on polishing mine up but it turns out some PO had it chromed.  The chrome is now flaking in parts and looks like garbage.  I guess i would always paint the thing.....
« Last Edit: December 17, 2010, 04:48:35 PM by knowsnothing » Logged

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andy750
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« Reply #26 on: December 17, 2010, 06:09:10 PM »

If you mean the sprocket cover then yes I have on for you.

cheers
Andy
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azure
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« Reply #27 on: December 19, 2010, 09:11:28 PM »

Treeve, D'you get that pesky stud out?


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knowsnothing
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« Reply #28 on: December 20, 2010, 01:38:37 AM »

I haven't had a chance to futz with it Ben.  I also for got to get the torch from my buddy.  Might go pick one up at Lowes sometime this week and have at it.  I will continue to soak it while i wait. 
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Alan F.
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« Reply #29 on: December 20, 2010, 08:22:32 AM »

Or let it soak until january beer night and borrow mine Wink
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