Author Topic: Speedometer Gearbox ?  (Read 641 times)

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Offline shag

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Speedometer Gearbox ?
« on: June 23, 2018, 12:18:33 PM »
Hey guys. First post. First bike. 74 cb350f. I had been kinda wanting a motorcycle for about a year and keeping an eye out for something that interested me. I didn't want a crotch rocket or a Harley or anything too big. Ran across this 74 and fell in love with the look of it. I've had it almost 2 weeks now.

Now for the question...when I got it, I knew the speedo wasn't working. Actually had a new speedo and cable on it and the guy said something in the gearbox was the issue. So I got on ebay and just ordered a new/used speedometer gearbox for it. It and my Clymer book came the other day. Today I got around to tearing into it.

Took the front wheel off. Broke the axle nut. Removed axle and speedo gear box. Compared the old one to the "new" one...the "new" one is missing the piece that presses against the gearbox retainer. Come to find out, that's actually the piece I'm in need of. From what I can tell from what's left of it, it appears to be rubber that presses against the gearbox and has 2 little ears on the inside which turn the internals of the speedo gear.

Should/Does the piece come with the speedo? Is it a separate piece...if so, what's it called and where can I get it?

Thanks so much for your time. I've already learned a lot here.

Offline piefairy

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Re: Speedometer Gearbox ?
« Reply #1 on: June 23, 2018, 06:34:26 PM »
http://4into1.com/speedo-tach/

Should have what you need.

Offline shag

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Re: Speedometer Gearbox ?
« Reply #2 on: June 23, 2018, 09:07:53 PM »
I'm probably just overlooking it, but I couldn't find what I'm needing. I'm planning on doing a little riding in the morning. After that, I'll pull the axle again and try to post pics of what I've got. Thanks!

Offline piefairy

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Re: Speedometer Gearbox ?
« Reply #3 on: June 23, 2018, 09:31:39 PM »
Here is the microfiche for your bike. See if you can identify your part on it.
https://www.cmsnl.com/honda-cb360-sport-1974-usa_model1007/partslist/#.Wy8ed6dKiiM

Offline camshaft1991

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Re: Speedometer Gearbox ?
« Reply #4 on: June 24, 2018, 10:03:24 AM »
Whatever your referring to it’s part of a whole assembly. Here’s link to the wheel
https://www.cmsnl.com/honda-cb350f-four-1972-usa_model435/partslist/F++07.html#.Wy_OQJFOmEd



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Offline shag

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Re: Speedometer Gearbox ?
« Reply #5 on: June 24, 2018, 11:23:56 AM »
Come to find out, it's actually the gear box retainer I need. It's number 8 in the diagram. It's what has the 2 little ears to drive the speedo gear. I can't find one anywhere other than an aluminum, one piece, from Japan that only has one review and they said it didn't fit their 350F. Anybody know where to get one?
« Last Edit: June 25, 2018, 07:38:22 AM by shag »

Offline shag

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Re: Speedometer Gearbox ?
« Reply #6 on: June 25, 2018, 07:40:40 AM »
Bear with me guys. Like I said, I'm new to this. Thanks for all the help thus far.

Offline shag

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Re: Speedometer Gearbox ?
« Reply #7 on: June 25, 2018, 09:00:01 AM »
I took a chance and ordered the one piece aluminum from ebay. Its all I could find. I hope it works out. I really need the speedometer working. The law around here will pull their own mothers over and write a ticket for 5 over the limit.