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Messages - AshimotoK0
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6616
« on: February 09, 2010, 08:37:40 AM »
6617
« on: February 08, 2010, 01:24:15 PM »
Pics are coming - I am just perfecting the temperatures etc and I am now favouring hot air gun (controlled by a Variac to achieve optimum melt temperature) and then cold 'forming' platen tool I have made from two bits of aluminium. I even made some covers you can can 'prepare earlier (Blue Peter style!!) and then slip on the wire, using PVC bonding adhesive to attach to the wire. They are looking "Honda style' - well good enough for me anyway. I am also doing a TOTAL refurb of the regulator, rectifier, start switch as well ( I have stripped these down to the component parts, replated and need to reassemble, I must be mad I know  I have also used the tool I made to heat crimp the type of 'slip on' bullet covers you get off Ebay and they look pretty good and you don't need the skipping rope (apart from the ones which have 2,3 and 4 bullets going ito them) For my bit on the starter solenoid see my comments inside this post, it will be updated once I have yellow chromate passivate plated the steel parts. http://forums.sohc4.net/index.php?topic=57104.0Cheers Ash D
6618
« on: February 07, 2010, 01:55:02 PM »
Looking at this Honda Bulletin, am I OK to fit a later gear shift drum and selector forks to give improved shifting. My bike has 46k miles but I have never ridden it to tell what the shifting was like. http://data.sohc4.net/SB750/750_40.pdf
6619
« on: February 07, 2010, 01:39:40 PM »
Yes it is the same article but the US site down.
I have both types.
On the photo of the parts which I have the one you can just see in the background is a 392 but I am sure is off a K7. The others came from an F1 motor I got to rob the crankshaft from for my K0 The F1 Engine no was CB750E-2545740 . I do have the head from it too but it has a small mark on the ring around one of the combustion chambers and also the barrels but one has slight corrosion on the top of one of the bores, as the motor was left standing for yonks.
6620
« on: February 07, 2010, 12:26:55 PM »
6621
« on: February 06, 2010, 02:21:09 PM »
Please see: http://www.sohc.co.uk/index.php?topic=2586.msg7389#msg7389Also: I posted this on another site : Back to the clear covers. Please don't mock the following  Bought a child's skipping rope which had PVC outer tube for 2 GBP. had it analyzed as well as a '69 Honda terminal cover and basically the same PVC except that the skipping rope one had a child friendly plasticizer in it. But the OD and ID were too big. Heated it up whilst stretching it to achieve a narrower OD and the right wall thickness, then quenched in cold water. Cleaned the bore with isopropanol and dried. Then used my daughters old hair crimpers and managed to fuse the sleeving end to a piece of old Honda loom cable (the temperature needs to be just right to soften the PVC but not degrade it). I just need to make the right heated aluminium platens on my lathe to give the correct profile. then they will look just like Honda 'fused to the wire covers' (female bit of bullet). I will post full details and pics when I have finished it. I was born in the early 50's you know and we had a 'make do and mend' philosophy drummed into us in the UK !! Ash D
6622
« on: February 05, 2010, 10:10:31 PM »
I have these but not sure if they are F1 type. they have 392 on the Skirt and HONDA ( approx.1.1mm top ring)
Also, see
http://forums.sohc4.net/index.php?topic=57528.0
The piston in the background is also a 392 but has the thicker rings and different top profile - pretty sure its off a K7
6624
« on: January 31, 2010, 12:37:54 PM »
Yes just the sleeve.
The Babyliss straighteners get far too hot and the other temperature controlled ones we have are kn*ckered so I am going to adapt the elements from the kn*ckered one onto a temperature controller and try that (I run a small electronics design and manufacture business so I have plenty of parts). will post my findings.
I am setting myself a weekly targets on the K0 and this week's target is to refurb the wiring loom without spending a hundred quid!!
6625
« on: January 30, 2010, 12:48:51 PM »
Hey - just looked on CMS website at the feedback on a new K0 wiring loom (actually a '341' loom) and someone complained that the twisted and soldered wires inside the loom (i.e. under the tape wrapping) were found to be twisted together but not soldered. Imagine having to track that one down. it was described as manufactured by Honda but a repro and had Honda P/N Just tring to modify an old pair of hair straighteners ( as you guess I have teenage daughters ) to make a rig to fuse together plastic sleeving to get the original look on the connector sheaths. Anyone know where you can get transparent sleeving from of the original size? Also worth remembering on looms where connectors are tinned that you can clean them up and then dip them in the dip type tinning solution used for PCB manufacture (Printed Circuit Boards) to replate. I did this on my 400/4 loom back in 1986!!
6626
« on: January 30, 2010, 12:02:18 AM »
Thanks - I have the manual just wanted to see what it looked like unmolested.
gues this pic gives me a good idea!
6627
« on: January 29, 2010, 10:15:53 PM »
Anyone know how many dark green wires are in the main loom which going into the headlamp bucket on a K0? I suspect two, which each go into multi way female bullet connectors. found this which is really good http://oldmanhonda.com/MC/wiring750K1.htmlAnyone got a hi-res picture of an unmolested K0 loom? As you can no doubt guess I am currectly rebuilding my original loom
6628
« on: January 28, 2010, 08:17:56 PM »
I have had a CAD drawing done for an oversize caliper pivot pin for the CB750K0/K1/K2 if anyone is interested. I am getting on made in Stainless Steel and reaming the hole in the arm and brackets out to 11mm. the standard pin is NLA from Honda and I don't even think Yamiya sell a repro one See http://forums.sohc4.net/index.php?topic=30553.0
6629
« on: January 28, 2010, 08:12:25 PM »
See my earlier post http://www.sohc.co.uk/index.php?topic=2398.0
However, for rusted bolts in the frame then probably heat and penetrating fluid. Be careful not to crack the engine mounts as I got a parts bike (K7) and a spare set of cases which had damaged engine lugs. I was lucky, as most of my engine bolts had been replaced with studded bar which did not seize (had to buy new bolts though!!).
You probably know already Jock but the sister US site has a wealth of postings on it. I just wish that 'Hondaman' on it would get his book finished!!
6630
« on: January 28, 2010, 08:09:00 AM »
The best think about your bike is it's a Genuine (Oval rear lamp) CB750 or if a later one a genuine rare K0. Sandcasts were never sold here so I can't really see why people in the UK wax on about them (unless they are treating it as an investment). Think of the history and stories of that bike. Some guy and his wife using it for their sole mode of transport for years on a Scottish Island. I bet there are many tales to be told about it's history. Imagine in 1970 it's appearance there, where it would have been admired by schoolboys but told it was 'Jap Crap' by old A10 riders. Maybe, we should have a 'Who do you think you are' TV program' for vehicles.
Enjoy the restoration in your retirement and take your time. Then when it's finish go back with it on holiday to the Island it came from.
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Sorry Seamus but you are a bit wrong there I work 6 days a week but there is nothing on TV, too cold to go in my garage to work on the K0 on an evening. My philosophy is that there are parts you can restore and parts you can't. I would rather save a hundred quid restoring my existing loom and spend it on bits you can't restore like worn out shocks and HM300's . Must admit I do geta bit obsessed though - its what I I call the 'K0 bug'.