Honda CB750 Sandcast

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Topics - Rddmm2

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1
General Discussion / Should i drill clutch basket holes
« on: October 31, 2019, 03:15:51 pm »
Hi all,
My clutch was a bit grabby when hot, so i removed it and cleaned and roughed up the friction plates and soaked them in 20w 50 oil.  I also wanted to drill extra holes in the clutch basket to improve oil flow but discovered that it has no circulation holes.  Perhaps only the later cb750's had pre-drilled holes from the factory?   Has anyone else done the 'hondaman' suggested mod and drilled holes in their clutch basket to improve performance?  I'm a bit reluctant to drill holes in an original part but will consider doing it if its a common modification.   It's a late model sandcast and a Sunday runner re  10068**.  Thanks.

2
Front End and Suspension / Rear shock talk
« on: March 12, 2019, 01:37:17 pm »
Hello all.  I wanted to disassemble my rear shocks for cleaning.  This led to a discussion.  It looks like my shocks are from a K2 or later since no black tops -  my bike is late model sandcast Vin 10068**.   I note that Yamiya sell a black top replica set, but they also list a rear 'short type' replica shock for 1969 that's all chrome like mine.   Did 'short type' exist in 1969? There seems to be a variety of different rear shocks found on restored sandcast projects.  For ex., recent mag 'Classic Bike' Honda CB750 50 yr anniversary article shows a sandcast with rear shocks with no chrome cap over spring.  I read some of your previous threads on this.  Anyway, what do you think. Are 'short type' replica shocks merely for the modern day vertically challenged or were they an option back in the day?

3
Parts Wanted / Need bottom 1/2 of KO RH Switch
« on: March 17, 2011, 09:37:56 pm »
I need the bottom half portion for my KO right-hand switch, with starter button, for an early single throttle cable.  I thought i would give this a try since I'm not having much luck finding an oem or correct reproduction switch for my sandcast.  I was hoping someone would have parts from an old switch kickin around that they might be willing to sell.  I don't have many parts to offer in exchange other than later K4 and K5 bar switches, and a single cut front fender, circa 1970, with supports.         
The bottom of my RH switch must have been replaced with the bottom half of a later 'pull-push' switch.   I attach a picture of the underside of my switch.
Thanks.
Rob

4
Lighting Systems and Chassis Electrical / LH switch reproduction
« on: March 08, 2011, 04:25:34 pm »
This replacement LH switch, F 031, arrived from Yamiya. 
I sent them a pic of the rough flat-black finish on the underside, this is the answer I got.

...."Thank you for your inquiry.
1. The OEM item of HONDA is such finish altogether about two years before.
Therefore, our website has also carried such a photograph.
We checked to HONDA before.
I think that the factory was changed into China from Japan.
Even if you send it, we stock only the thing of such finish."

Is the LH switch i received a good repro of the original? That seems to be what Yamiya are suggesting or perhaps I'm misunderstanding their reply.  My old switch is faded at bottom but not rough.  Rob, #6806

5
Front End and Suspension / fork gaitor replacement comparison
« on: February 09, 2011, 10:44:35 pm »
I've removed my forks for a general cleanup.   Does anyone recognize the old gaitors from a different model? the old gaitors have a thick lip at both top and bottom - however, the OEM replacements have a thick lip at bottom but a thin lip at top that fits over the bottom of the fork ear. - can someone confirm whether I've installed the right OEM #51611-300-000 gaitors?
Thanks. 

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