Doms CB550F1 project

[Oddjob]

All mine just fell off Dom. Try some heat and see if that helps. I have a few of the shafts if you bugger it up.

[DomP]

All mine just fell off Dom. Try some heat and see if that helps. I have a few of the shafts if you bugger it up.

I'll get my mapp gas on it Ken

[DomP]

Bingo! Got it hot and off it popped with a big whack Ken, I tapped the new one home using a 21mm deep socket and then the last bit with an old 6205 bearing as a spacer to get the extra depth needed that the deep socket didn't have.  I think that makes sense but essentially a success.

[DomP]

Yesterday I travelled to Bryan to pick up my .5mm rebored barrels, I assembled the bottom end when I got back using what I thought was the thinnest layer of Hondabond, maybe it was due to my garage being pretty cold but it was near impossible to brush on.  I ended up dabbing it on with my finger to get a thin covering.  When I torqued all bolts down I got a small amount of sealant squeeze out which is now concerning me, in my haste, ok it was excitement, I missed to hondabond the two crank end seals.  Do I need to split it an do it all again?

[Bryanj]

Nope, it should be ok as long as case uo to edge of seal was done, seals are slightly oversize so should clamp ok.
As to sealant squeezing out a small amount is ok

[DomP]

It really was a tiny amount Bryan, I went to bed lastnight thinking I'd be having to split them again today.  I got the piston rings all fitted and all together on the conrods, really glad to see no play in the gudgeon pin on no4 cylinder like with the old piston and pin.

[McCabe-Thiele (Ted)]

Yesterday I travelled to Bryan to pick up my .5mm rebored barrels, I assembled the bottom end when I got back using what I thought was the thinnest layer of Hondabond, maybe it was due to my garage being pretty cold but it was near impossible to brush on.  I ended up dabbing it on with my finger to get a thin covering.  When I torqued all bolts down I got a small amount of sealant squeeze out which is now concerning me, in my haste, ok it was excitement, I missed to hondabond the two crank end seals.  Do I need to split it an do it all again?

I also  tried & failed to apply Hondabond with a brush even in the warm it was just too thick. In the end I wore a pair of disposable gloves, I would squeeze some Hondabond on the back of my left hand.

I then used my right forefinger to transfer small amounts of Hondabond onto the inverted upper crancase - this seemed to give me the thinest layer of sealant. Bearing in mind my three Groundhog days (http://www.sohc.co.uk/index.php/topic,23291.225.html) I became very well practiced in the art of thin film technolgy.

I can't claim this method of application was my idea NJ gave me the tip, probably from years of applying ointment during her years of Nursing. 

[Oddjob]

I've always used the fingertip dab method, seemed logical to me at the time in order to get a thin film.

[DomP]

This weekends slow progress, I got down into the pub by my brother in law so that halted things. 

[McCabe-Thiele (Ted)]

I would pop some grease on those stud threads Dom.

[DomP]

I would pop some grease on those stud threads Dom.

Bryan suggested I didn't put anything on the threads as it mucks with torque settings.  Might have a bit of a hold up with my barrels now though.

[McCabe-Thiele (Ted)]

I would pop some grease on those stud threads Dom.

Bryan suggested I didn't put anything on the threads as it mucks with torque settings.  Might have a bit of a hold up with my barrels now though.

Oil or WD 40 then as they look so dry - I would be worrying about any more rust forming.

[DomP]

I think they appear dryer/rustier than they are in the photos but I'll wipe them down with WD40 for you Ted😉  I was thinking of putting some rust treatment on the shafts of the exposed studs to protect them once fitted.

Hopefully get this thing started before Christmas!

[Laverdaroo]

Looking good Don, that’s great progress and the cases look fab


Sent from my iPhone using Tapatalk

[Oddjob]

Bryan is right about grease potentially mucking with torque settings. However, having threads like those with nothing done to them can also cause problems. The threads can getting damaged when the head and barrels are removed just by the rust/debris/crap that’s around the threads when you go to remove them. I always run a good die down the threads to make sure any rolled over threads are cleaned up, I’d also give them a thin smear of molybdenum grease before fitting the barrels, just to protect them from rust over the years they’ll be exposed. I also used to grease my threads and use a slightly lower torque setting to compensate for the grease. Around 2-3lbs lower. Around 14ftlbs iirc. Modern Hondas started to spec pressures with the threads oiled. TBH I think a lot of them got oil on the threads and especially the nuts back in the day, common practice was to throw all nuts/bolts in a tub as you dismantled the engine, we knew where they came from, we didn’t need to have them in separate boxes for example, lots of other stuff also got thrown in the same tubs, stuff dripping with oil, so the head nuts would be soaked in the oil coming off those parts. Didn’t seem to cause any problems back then tbh.