Honda-SOHC

SOHC.co.uk Forums => CB750 => Topic started by: MarkCR750 on February 06, 2014, 03:57:48 PM

Title: CB750 K7 Dual disc conversion.
Post by: MarkCR750 on February 06, 2014, 03:57:48 PM

Hi, I'm building a replica CR750, one of my next tasks is to do the dual front disc conversion, I have found a few old threads but has anyone done this recently?,  any pitfalls I should look out for?, I have a second disc/calliper/mount and am using a Fireblade 919 master cylinder,any tips/photo's would be appreciated, cheers Mark.

Title: Re: CB750 K7 Dual disc conversion.
Post by: Ewan 500 K1 on February 06, 2014, 06:04:12 PM

my experince on pages 5,6,8 & 9 of 500/4 my build thread Mark, cunno if its muh help .. but goes through my pains and agony ;)

http://www.sohc.co.uk/index.php/topic,4120.0.html

Title: Re: CB750 K7 Dual disc conversion.
Post by: MarkCR750 on February 06, 2014, 08:05:27 PM

Cheers Ewan, no pain no gain!

Title: Re: CB750 K7 Dual disc conversion.
Post by: gamma on February 06, 2014, 09:11:27 PM

I did this some time ago and still not finished the bike but I made a spacer to put the discs at the same distance from each fork leg, and am going to use a KOSO tacho so got rid of the cable drive and fitted a spacer see http://forums.sohc4.net/index.php?topic=74974.msg835181#msg835181

Title: Re: CB750 K7 Dual disc conversion.
Post by: MarkCR750 on February 06, 2014, 10:22:37 PM

Thanks Gamma, I am getting rid of the speedo drive as well so it makes sense to use a spacer as you have done instead of using lots of spacers on the calliper mount, cheers for the photos too, looks great.

Title: Re: CB750 K7 Dual disc conversion.
Post by: Bryanj on February 07, 2014, 07:02:28 AM

If you are doing away with the speedo drive it won't matter but i dont think the later hub has the two flats to drive the very early/modified plate needed for road use

Title: Re: CB750 K7 Dual disc conversion.
Post by: MarkCR750 on February 07, 2014, 05:30:29 PM

That's right Bryan it hasn't, I'm putting my CR on the road when it's done but I'll be using an electronic bicycle speedo , I used one on a ZXR400 I had a while ago and they are very accurate if you set them correctly, interestingly they read well over the ton, (the manufacturers must have expected some extremely fit customers!).