Author Topic: How stupid would this be?  (Read 1352 times)

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Offline Patrick

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How stupid would this be?
« on: April 03, 2008, 11:31:05 AM »
The K0 750 project bike I rebuilt last fall is running well. Very well in fact. Anyone who might remember my frequent posting during that period may recall that I have a hot cam in this bike. So extreme, in fact, that when I posted a picture of the cam profile the only comment from engine maestro Mr. Rierk was "Yikes." He was more right than he might have known. That was my reaction, as well, the first time I rode the bike. I don't have a working tach, but I know when I hit 5500 rpm. That's when my shoulders jerk. Hard.

When I rebuilt the engine, however, I used aftermarket sealing rubbers of unknown origin over the bolts in the cylinder head. That was a mistake. One of them leaks oil. Badly. So badly, in fact, that I am kind of surprised that I don't leave a ducktail when I roll down the road. After a couple of miles riding in the oil mist the leak releases I no longer can feel the cold, no matter the temperature.

All of that leads to my question. I really don't want to pull the engine right away because apart from the Exxon Valdez caliber effect the bike has on the environment, it runs starts very easily, idles perfectly and consistently passes bats outta hell when I go WOT. The leaking seal is the second from the left. It leaks into an isolated cavity in the head that sprays to the number one exhaust pipe and between the one and two carbs. There are only a couple of holes in the front and rear of the head for the oil to escape from. Would I be endangering the health of my bike by just plugging up these holes for the time being to contain the oil? I assume the cavity is there to assist colling. Would closing up these holes affect the cooling of the head?

BTW, am I the only one who hasn't been able to get on the forum for the last 24 hours or so?

Patrick
1970 CB750 K0
1982 VF750S Sabre
1987 VT1100 Shadow
1979 Yamaha XS11
1969 Yamaha DT1B
etc.

Offline fastbroshi

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Re: How stupid would this be?
« Reply #1 on: April 03, 2008, 11:37:53 AM »
I don't know much about the 750's but no, I couldn't get on the site yesterday either.
Just call me Timmaaaaay!!!

Offline hymodyne

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Re: How stupid would this be?
« Reply #2 on: April 03, 2008, 11:41:27 AM »
Tear her down and do it right. IMHO :)

hym
"All things are ready if our minds be so."

Offline Geeto67

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Re: How stupid would this be?
« Reply #3 on: April 03, 2008, 11:42:51 AM »
Tear her down and do it right. IMHO :)

hym

EXACTLY!

I lived with a cb750 oil mist for a long time - it will feel so much better when she is done and done right.
Maintenance Matters Most

Offline Kevin D

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Re: How stupid would this be?
« Reply #4 on: April 03, 2008, 06:44:08 PM »
Patrick,

 I haven't done it yet 'cause my engine is still apart, but I've been counselled to glue 'em in place with hondabond.
 
I had a bad leak from the same spot the first time I took my engine down, 35 years ago. I think it would have leaked the engine dry in a half hour.
 
« Last Edit: April 03, 2008, 07:40:25 PM by Kevin D »
71 CB750 K1
104,000 miles
Original Owner
———past———
70 SL100/125/150
70 Candy BlueGreen CB 750 K0
————————————————-
Former Honda parts kid/counter kid/do all
—————————————————————-
Whether you think you can or think you can’t, you’re right
Genius is 99% perspiration, 1% inspiration

Offline Patrick

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Re: How stupid would this be?
« Reply #5 on: April 03, 2008, 07:54:05 PM »
Yeah, kind of what I figured. Given the skill level apparent on this forum, however, I just kinda hoped someone knew a miracle cure. I've already tried Holy Water.

Cars were spinning off the road into the ditch behind me as I rode it this afternoon to a local Honda dealer that miraculously had a set of Honda seals in stock. A sign....? Had to give her one more ride before I tear her done. It's supposed to be 78 and sunny tomorrow. What a waste.

I want to turn this around tomorrow to get her back on the road

This bike is so hot I have to sit back from the tank.

Patrick
1970 CB750 K0
1982 VF750S Sabre
1987 VT1100 Shadow
1979 Yamaha XS11
1969 Yamaha DT1B
etc.

Offline 754

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Re: How stupid would this be?
« Reply #6 on: April 03, 2008, 08:25:54 PM »
Will this cam be for sale?
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way