Author Topic: broken tach drive part  (Read 832 times)

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Offline gmonkey

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broken tach drive part
« on: March 30, 2010, 09:43:28 AM »
In my infinite wisdom, I broke the small aluminum piece that holds the tach cable to the valve cover.  The one with one screw that holds the end of the tach cable pinched in place and one screw that holds the piece to the valve cover.  Not sure what it's called, sorry.  I'm not too worried about the tach cable itself since I was going to try to rig up an electric tach and it looks like the piece would still hold the cable in place.  It broke into two parts, one of them being the part that actually goes into the valve cover.  The question is, what's actually on the other side of this assembly inside the valve cover?  Do I have to worry about the broken off part falling in and jamming things up?  I've heard of people plugging this opening up, anyone have any info on deleting the mechanical tach drive?  Is the rod sticking out of the opening that drives the cable something I can pull out through the opening or do I have to take off the valve cover?
Big pile of 76 CB550F parts
'98 FZR600 purring like a chain-smoking kitten!

Offline steamnjn23

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Re: broken tach drive part
« Reply #1 on: March 30, 2010, 10:12:22 PM »
i'm going to follow this thread, because the PO left me in the same quandry.  do you have a picture of the problem?
1976 cb550

Online bryanj

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Re: broken tach drive part
« Reply #2 on: March 30, 2010, 11:15:23 PM »
You can remove the gear and broken piece then subsitute a turned fitted piec of alloy/brass with an "O" ring groove with ring and held in by a screw into the original retaining part

Hope that makes sense
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline gmonkey

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Re: broken tach drive part
« Reply #3 on: March 31, 2010, 06:59:34 PM »
It makes sense.  Thanks.  Can I pull out the gear without taking off the valve cover?

Here's the pic.  Sorry, damn smart focus camera focuses on everything but what I want even in super special close-in mode.
Big pile of 76 CB550F parts
'98 FZR600 purring like a chain-smoking kitten!

Online bryanj

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Re: broken tach drive part
« Reply #4 on: March 31, 2010, 10:06:48 PM »
Yep just pull the gear, DO NOT bin it as Honda still sell the casting but have obsoleted the gear so somebody on here might have a need of it
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!