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Messages - martin_uk

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61
CB750 / Re: CB750F1 Valve guide reaming
« on: December 09, 2018, 04:07:32 PM »
Life is a continual learning experience and I have wasted far more money  :P

I spoke to engineering co suggested in Wallington and they can diamond hone for about £30, but it means getting it to and from them.

I have bought an adjustable reamer from UK so will see how that goes.

62
CB750 / Re: CB750F1 Valve guide reaming
« on: December 04, 2018, 08:30:54 PM »
Quote from: Bryanj on December 02, 2018, 10:23:48 PM
If there is no lead on the reamer sounds like a machine one instead on a hand one

Yes it was described as machine. Does that mean it has to be set up precisely rather than using a variable speed  hand drill?

63
CB750 / Re: CB750F1 Valve guide reaming
« on: December 04, 2018, 08:28:13 PM »
Quote from: Laverda120 on December 02, 2018, 07:38:48 PM
You could try J D Autoworx based in Wallington.
Thanks I will give them a call

64
CB750 / Re: CB750F1 Valve guide reaming
« on: December 01, 2018, 09:52:52 PM »
The reamer has arrived and is a close fit on the non replaced guides, but does not have a lead in.

Without a lead in, concerned that it will be difficult to correctly align.

The finished size needs to be 6.6mm. I have seen Chinese adjustable reamers, but not sure about quality and will take quite a few weeks to arrive

As an alternative, has anyone had guides reamed and can recommend a company in the South?

65
CB750 / Re: Finned exhaust clamps cleaning up & replating?
« on: November 21, 2018, 09:21:44 PM »
I have had them zinc plated or nickel plated which is normally much cheaper than chroming

66
CB750 / Re: CB750 Starter Motor
« on: November 21, 2018, 09:18:56 PM »
It is not unusual for the earth cable to have a high resistance if connection to engine incorrect or paint is preventing full contact.

If you have jump leads try adding an extra lead from battery earth to engine to see if it makes a difference .

Also worth checking volt drop see https://www.autotechnician.org/starter-voltage-drop-test-explained-in-plain-english/

67
CB750 / Re: CB750F1 Valve guide reaming
« on: November 21, 2018, 09:09:26 PM »
Assume normally ream from combustion side?

68
CB750 / Re: CB750F1 Valve guide reaming
« on: November 19, 2018, 08:43:05 PM »
I have checked and appears to be a 6.6mm reamer required.

Found one in Germany on Ebay,  so will see how it works out.

69
CB750 / CB750F1 Valve guide reaming
« on: November 19, 2018, 10:19:46 AM »
Just spoken to guy that usually does my machining and has fitted a new guide for me.

Only one was needed and bought a genuine Honda one from DS

He says that a non standard reamer is required and he does not have one :-(

Anyone have one to loan or recommend where to get?

Just off to collect.

I am making progress on my final? CB750, but slower progress than first ones.

Frame and wheels just about there, assembled lower engine.

Cylinders rebored and ready to paint, now need to finish top end and make up a set of carbs from all the bits ::)

Thanks

70
CB750 / CB750 Alternator lead
« on: September 26, 2018, 03:55:51 PM »
I have just received a new lead from 4 into 1 purchased through Ebay.

Came through very quickly from US

Looks good and came out at £22 inc postage.

Alternator Wire Harness - 31110-300-154 - CB750 CB750K CB750F - 1969-1978

https://www.ebay.co.uk/itm/Alternator-Wire-Harness-31110-300-154-CB750-CB750K-CB750F-1969-1978/172403613700?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649


Was not sure if I would be hit with import charge but luckily not as I seem to recall there is a concession up to £15 ?

May be useful to anyone needing one .

I decided to go for a new repro loom from DS, so thought would be good to replace this bit as well.

I have also ordered the combined regulator rectifier from Amazon at c £15 to give a try.
https://www.amazon.co.uk/gp/product/B075MB7PRS/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

I do have some old original units but at that price worth a try.

71
CB750 / Re: CB750F1 Brake caliper binding with new pads
« on: May 13, 2018, 01:11:31 PM »
Thanks for suggestions.

It has a new piston and seal and pad free in housing.

Probably the piston is slightly longer, so will sand down pads to provide a bit of clearance.

72
CB750 / CB750F1 Brake caliper binding with new pads
« on: May 12, 2018, 11:04:53 AM »
I have a CB750 F1 restored to rolling frame stage , my third F1 restoration, but slowing down a bit as has been in progress for a while  ::)

Decided I should do something with it and has been on my bike lift for too long.

Fitted a restored front caliper new lines and DS repro, piston, MC and pads, but it binds with adjuster slack and arm moves freely.

Has anyone else encounted problem?

Will have to sand down the pads if no other option, but without removing piston which I think is the culprit, can't see any other option.

73
CB750 / Beware non original CB750 side panel grommets
« on: May 12, 2018, 10:56:32 AM »
I found this issue and wanted to warn others.

I managed to fit one non standard grommets when restoring my K8.

I was trying to remove the side panel and other two lugs came out but one resisted all attempts inc use of WD40.

I applied a bit of leverage but panel cracked >:(

My own fault but annoying with a pristine painted panel.

I did manage to remove using a hot air gun to warm grommet as it had gone very hard.

Should have done this first.

I have replaced grommet with a new Honda item.

Decided to have a bit of a clear out and the K8 and C90 are first to go.

I have a CB750 F1 restored to rolling frame, ideal if someone has a good engine.

Just got fresh MOTs on both.

I have got quite a few 400/4 bits as well and will try to get a list and photos together

74
CB750 / Re: CB750 Oil Pipe Nut sealing
« on: May 07, 2017, 04:06:29 PM »
I used aluminium washers on mine

75
CB750 / Re: CB750F1 Luggage Rack
« on: April 02, 2017, 04:32:02 PM »
Quote from: Skoti on March 26, 2017, 08:27:04 PM
Hi Martin,

it's possible to fit a Givi wing rack to your CB750F1.

See photos.

https://goo.gl/photos/BbV6Xz6MZ2Jx24sAA


Regards

Skoti.

Thanks Skoti

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