Author Topic: CB 750 Project 1 - Rides Well but a few tweaks needed (Read 114320 times)

timbo750 · « **Reply #425 on:** January 08, 2016, 01:41:20 AM »

I think the indent in the shift drum is not located in the centre of the switch. I will try the socket tomorrow and let you know how it goes.

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Terry in Australia · « **Reply #426 on:** January 08, 2016, 01:44:41 AM »

No worries mate, that'll be the problem, I reckon. Cheers, Terry.

Restoration Fan · « **Reply #427 on:** January 08, 2016, 02:43:01 AM »

Try shifting it out of neutral and then back into neutral...then test fitting the neutral switch.

Ron

timbo750 · « **Reply #428 on:** January 09, 2016, 02:15:55 AM »

Tried tapping the neutral switch with a socket and it would not move but it showed where the issue is, refer to first photo. So loosened off all the shift mechanisms, moved the drum out slightly and it fitted easily. Now I am thinking I have assembled something wrong with the shift mechanism. Of the next two pictures, can someone tell me which is correct for the roller?

Terry in Australia · « **Reply #429 on:** January 09, 2016, 04:01:02 AM »

Though I haven't put one together for a couple of years Tim, I'm thinking that the bottom pic looks right. Do you have a parts manual with the exploded diagram of all the shifter components stacked in the correct order? You should be able to download it from this site if you don't? Cheers, Terry.

edwardmorris · « **Reply #430 on:** January 09, 2016, 08:47:30 AM »

I had the same issue on the K2, and the switch only seated correctly with the shifter assembly apart. If you haven't already seen Dean's awesome vid series, this should help

timbo750 · « **Reply #431 on:** January 09, 2016, 08:42:01 PM »

Can anyone tell me the method for re-torquing the head. Do i need to loosen all the bolts first, if so how much, just a little or all the way. I couldn't find mention of it in Hondamans book.

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Restoration Fan · « **Reply #432 on:** January 10, 2016, 06:36:09 AM »

I did not loosen the bolts to do the re-torque. I just went back through the pattern...torquing to the desired #'s. Most of mine didn't even move as they were at the spec...but 2 or 3 of them actually tightened a smidge or so.

timbo750 · « **Reply #433 on:** January 10, 2016, 11:23:45 PM »

I have now re-torqued the head. And started on the cam installation, did everything according to the HM bible with the nickles. Then when it came time to install the cam and cam gear it was not as easy as I would of thought. Not that I thought it was going to be super easy but this was very difficult.
Once I got the cam in place the only way to get the cam gear on was to torque down the cam towers then it was still very tight. Its so tight I think I the tensioner would do nothing. I am thinking now that I have either installed the cam guide or rollers incorrectly or the cam is too short.

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timbo750 · « **Reply #434 on:** January 11, 2016, 04:16:44 PM »

The current plan is to first count the number of links on the chain, this is just to check if somehow I got the wrong chain. I doubt that the rollers are installed wrong, I had a look at the parts diagram and there is almost no way to install incorrectly. The slipper guide may be in upside down and if so I don't know if it will cause the chain to be too tight. If anyone has any other ideas or similar experience some feedback would be great.

Davez134 · « **Reply #435 on:** January 11, 2016, 07:21:56 PM »

Is it possible the chain is not sitting on the crankshaft sprocket correctly, like off to one side? I know it's unlikely, but a simple thing to check. Do you have the gear on the cam and bolted in place? I know mine seemed like it was right until I got the sprocket in place. Sorry that's all I can think of right now.

timbo750 · « **Reply #436 on:** January 11, 2016, 08:37:42 PM »

I had a look under neath and it all looked ok but the only light I had at the time was the phone, I will check again with a brighter torch. The cam chain is on the sprocket but was very hard to get on and is not bolted yet as I got the timing messed up in the effort to fit it.

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Jerry Rxman Griffin aka MuthaF'er · « **Reply #437 on:** January 11, 2016, 09:19:14 PM »

Cam chain on first followed by the sprocket with the beveled hole side inward.

timbo750 · « **Reply #438 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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timbo750 · « **Reply #439 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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Terry in Australia · « **Reply #440 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.

timbo750 · « **Reply #441 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.

Terry in Australia · « **Reply #442 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.

timbo750 · « **Reply #443 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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timbo750 · « **Reply #444 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.

timbo750 · « **Reply #445 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.

timbo750 · « **Reply #446 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.

timbo750 · « **Reply #447 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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70CB750 · « **Reply #448 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.

timbo750 · « **Reply #449 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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Author Topic: CB 750 Project 1 - Rides Well but a few tweaks needed (Read 114320 times)