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Author Topic: CB 750 Project 1 - Rides Well but a few tweaks needed  (Read 116423 times)

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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #425 on: January 11, 2016, 10:25:24 PM »
Cam chain has 47 links which is the same as photo on the Yamiya web site, which is the only thing I to compare to. So the relief there is I do not have to split the cases. The cam and chain are effectively in place but it just seems too tight and it was to long ago when I pulled it apart.

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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #426 on: January 11, 2016, 11:36:35 PM »
Ok. Not sure what is actually going on but it's together in the right order. I started to remove the cam and at first the chain would not come of the sprocket but by rotating things it eventually came of and allowed me reassemble with the correct cam timing. Reliefed now.
All I need to do now is install the oil pump and rockers and its then ready to go in the frame.

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Offline Terry in Australia

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #427 on: January 12, 2016, 12:24:43 AM »
Sorry I didn't reply earlier Tim, I've been offline for 3 days. Whenever I do a rebuild, after I re-torque the head (yes, you should back off all the cylinder stud nuts before re-torqueing, back them all off and you'll be surprised how far you pull it down the second time, and you pull them all down evenly) I always rotate the crank with a big shifter on the end of the crank,  using one hand to hold the cam chain up and out as it rotates. What did you torque it to? I torque standard studs to 19 foot pounds the second time around.

The cam chain can snag on all sorts of things as you assemble the top end, so this reassures me that I've assembled everything properly before I install the cam and rockers. Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #428 on: January 12, 2016, 12:50:06 AM »
Well the top end is done and isn't it a pretty site. I will be honest that I cant believe that I am see an alomst assembled engine. I am hoping I will have time on saturday to fit in the frame.

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Offline Terry in Australia

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #429 on: January 12, 2016, 01:51:15 AM »
It looks lovely Tim, did you do the valve clearances yet? (best time to do it) Make sure you slather lots of oil over the cam and rockers before you put the cam cover on. Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #430 on: January 12, 2016, 02:01:35 AM »
Yes, clearances are done and lots of oil as every part went on along with every rotation.

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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #431 on: January 13, 2016, 12:21:20 AM »
Came home from work today to a welcome delivery. Hope to fit this weekend along with the engine install.
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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #432 on: January 13, 2016, 01:54:44 PM »
Got myself a motorcycle lift and it comes with brackets that will allow it to be used after the exhaust is fitted. I then made a dolly for it so once the bike is lifted I can move it around which will also come in handy when installing the engine. I also made a frame that will allow me to lift the engine into the frame a bit easier.
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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #433 on: January 14, 2016, 10:31:54 PM »
Whilst fitting side covers in order ready myself for the install tomorrow I noticed a broken bolt for the alternator cover. I think I should be able to remove with left handed drill bit, so the install is going ahead.
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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #434 on: January 15, 2016, 01:43:29 AM »
Also discovered that I don't have a sump plug. Can anyone tell me what size the thread is?

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Offline 70CB750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #435 on: January 15, 2016, 05:15:31 AM »
Quote from: timbo750 on January 15, 2016, 01:43:29 AM
Also discovered that I don't have a sump plug. Can anyone tell me what size the thread is?

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Do you mean the oil drain?  Should be M12.
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Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #436 on: January 15, 2016, 10:56:22 AM »
Quote from: 70CB750 on January 15, 2016, 05:15:31 AM
Quote from: timbo750 on January 15, 2016, 01:43:29 AM
Also discovered that I don't have a sump plug. Can anyone tell me what size the thread is?

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Do you mean the oil drain?  Should be M12.
Yes that's it, thanks I thought it might be M12 but didn't have anything to check it with.
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Offline SOHC4 Cafe Racer Fan

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #437 on: January 15, 2016, 02:56:05 PM »
Timbo,

You might want to replace it with a magnetic drain plug.  For about $15-18, they will hold onto any feris matter and keep it from recycling through your engine.  Good for during the break in period.

http://goldplug.com/#plugfinder
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Offline Terry in Australia

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #438 on: January 15, 2016, 05:33:29 PM »
+1 on the magnetic drain plug Tim, I use them in all my bikes. Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Engine Assembly Continues
« Reply #439 on: January 15, 2016, 05:51:52 PM »
Yeah the plan was for one of them. But just want to plug it for now.

Almost got the engine in, I could only get some bolt hole line up, then I discovered why.
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Offline timbo750

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #440 on: January 15, 2016, 08:46:45 PM »
Well finally the engine is in the frame, I still need to fit the appropriate side covers as I only fitted some old ones I didn't have worry as much about scratches. I also fitted up the new Ikons, very happy with how they look. here are some photos of the process. it all went very well, however i forgot all about the long bolts used to hold the motor in and how crappy they look, I am sure i have a spare set that I can zinc plated and swap them over later.
« Last Edit: January 15, 2016, 09:15:48 PM by timbo750 »
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Offline Terry in Australia

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #441 on: January 16, 2016, 12:56:31 AM »
Looking good Tim, I like the black head/silver barrels look, very stylish!If you ever want to swap those K2 forks out for K6 forks, let me know mate, I've got a good set here, and I need some K2 forks.

I did some more work on Mike's bike today and fired it up for the first time ever (I built the engine out of parts I had laying around my garage because his engine was stuffed) and am very happy with it, no strange rattles (apart from the usual CB750 rattles) and excellent oil pressure, so apart from a few little adjustments and an issue with one of Carpy's oil lines, it's all good! Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #442 on: January 16, 2016, 01:05:44 AM »
Thanks, can't actually remember what the difference is between K2 and K6 forks, am I right in sayi g the calipers are behind the forks?

Also regarding the oil lines, is carpy where you mormally get them? There used to be a bloke ebay somwhere here is Aus doing a change over but he doesnt seem to be listed anymore. I was thinking of getting Pirtek to do mine.

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Offline Terry in Australia

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #443 on: January 16, 2016, 01:18:23 AM »
Thanks Tim, the K2 forks are different castings to the K6 forks, but all of the calipers were in front of the forks on the K series bikes. The Carpy lines are just stainless braided lines with pretend "Nuts" on the end, actually just fancy chrome covers for crappy hose clamps.

The "In" hose was pissing out oil before I pulled it apart and saw that when Carpy was assembling the hose into the "nut"  he didn't insert it all the way in, so I pulled it apart and re-installed the hose (prick of a job) and now there's just a slight weep, but not good enough, so I might have to take them to Pirtek.

I've only wasted 4 or 5 litres of new oil so far, but I'm kidding myself that at least I'm flushing any crud out of the oil tank.......... ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #444 on: January 16, 2016, 03:07:42 PM »
I have got 2 sets of hoses. So I am going to strip one of them down and clean the fittings and then take them down with the other hose to use as a template to get the lengths exact.

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Offline Terry in Australia

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #445 on: January 16, 2016, 11:43:08 PM »
Yep, that's the way to go Tim, I've given all my spare hoses away, so I'll have to re-use the ends off these ones after I turf that Carpy crap in the bin. Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #446 on: January 17, 2016, 12:45:57 AM »
I started cleaning the hoses and oil tank and noticed the spare ones where longer. I know the F tank is different,  did it result in a longer hose as well?

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Offline Terry in Australia

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #447 on: January 17, 2016, 10:50:44 PM »
That's probably it mate, I don't have an F here, so can't confirm, but the oil tank's are different shapes, so the hoses might be different lengths. Cheers, Terry.
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline timbo750

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #448 on: January 22, 2016, 05:05:43 PM »
I got myself a new drive chain from Yamiya whilst I was getting some other parts. The only thing is that all the instructions are in Japanese. Now i have done a drive chain before but it had the clip on the link but this one is different and I think I now need a tool to close the link?

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Offline seanbarney41

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Re: CB 750 Project 1 - Milestone Reached - Engine in Frame
« Reply #449 on: January 22, 2016, 05:35:28 PM »
you can buy clip links separately
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If it works good, it looks good...
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