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Old 04-22-2014, 11:33 AM   #1
lpfm1990 OP
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Oddometer: 63
1981 Honda cm400t

Well I just bought my 1st bike, an 1981 Honda cm 400 t, has 20400 miles, runs prefect (very very slight bog. Just needs the carbs cleaned) all it needs is a normal carb cleaning, front fork seals, and a battery as its getting weak, do they make an agm battery of its size? It runs great thou. Started ice cold, just choke and didn't have to touch once! Cosmetically it's about a 7 outta 10, chrome is pitted and has some rusty spots. But I'm not too worried as I know I'm probably going to lay it over once or twice as I'm new to this.




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Old 04-22-2014, 11:54 AM   #2
JackHinds
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That's a great bike! Looks to be in great shape, too. Did the PO store it inside?

I've got an '81 CB400T (share a lot of parts) and it's been great. Super easy to work on, absolutely bulletproof and a lot of fun! Are you going to do anything with it? Or just leave it stock?
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Old 04-22-2014, 12:00 PM   #3
lpfm1990 OP
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Right now. Stock. Just going to get the forks rebuilt (about $120 total to have them pop them off and redo them) mostly indoors. Has some small marks in it. And front fender has a dent on the back. But. For me. It's good enough. Any tips or trick I should know. Or mods to help anything at all?


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Old 04-22-2014, 02:00 PM   #4
TonyKZ1
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Congrats on the new bike! It looks pretty good for its age. Nice to have the luggage racks and stuff too.
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Old 04-22-2014, 02:18 PM   #5
nick949eldo
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Great Bike!

Never underestimate the capability of the CM400. My son's first long ride was up to James Bay (Quebec) on his. The bike just hummed the whole way.

Nick

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Old 04-22-2014, 07:05 PM   #6
lpfm1990 OP
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Does anyone off hand know what "size" the battery is? Like a 8lb, 10lb etc? I forgot to grab it earlier (got it at my old supervisors barn as my garage is packed right now as I haven't gotten my snowmobile put away yet. And I'd like to go to napa in the morning and get a new battery so it starts without needing a jump


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Old 04-22-2014, 07:11 PM   #7
luckychucky
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Nice Score

Fine first bike, good luck!
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Old 04-22-2014, 10:46 PM   #8
epb
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Quote:
Originally Posted by lpfm1990 View Post
Does anyone off hand know what "size" the battery is? Like a 8lb, 10lb etc? I forgot to grab it earlier (got it at my old supervisors barn as my garage is packed right now as I haven't gotten my snowmobile put away yet. And I'd like to go to napa in the morning and get a new battery so it starts without needing a jump
Call ahead. My CB400T (younger sibling to your CM) needed a new battery and all anyone local had that fit was one of those kits where you buy the battery, put in the acid, add water and charge it overnight. And that's in a city the size of Chicago. You may not be able to walk in off the street and get one of the shelf.
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Old 04-22-2014, 11:21 PM   #9
lpfm1990 OP
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Ill drive over to napa. I live in the middle of no where. But, have a napa 3 minutes from my house. Lol. I think from looking it up, it is a yb12a-a does that sound correct?


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Old 04-23-2014, 06:40 AM   #10
TonyKZ1
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Yep, that's what the Yuasa Batteries site says, YB12A-A.
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Old 04-23-2014, 06:42 AM   #11
TroopThrowback
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That does sound correct. You honestly are going to want an AGM battery for the same price you can get your standard fill able wet cell. You can order online and have it shipped. They good a charge much long and have longer overall life. Handy for those long winters when you forget to put it on the trickle charger for a month.



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Old 04-23-2014, 07:20 AM   #12
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Throw some SeaFoam in the gas, that may clean the carbs up. Clean or replace the air cleaner as well.
Check the fuel filter as well.
Enjoy riding !!!


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Old 04-23-2014, 09:00 AM   #13
lpfm1990 OP
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Went to napa, had a battery in stock. Just have to do the acid and charge it (no big deal, Atleast I know it's fresh and it's a crap spring rainy cold day here). So tomorrow ill put in the new battery, and some sea foam (that stuff is great, use it all the time on my sleds). Next week ill get the forks rebuilt and I should be good to go


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Old 04-23-2014, 09:51 AM   #14
lpfm1990 OP
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Just so I have ideas in my head all year long... The mag side pipe is getting rusty in spots, would I be better to just get new ones, re chromed. Or as an idea. Kinda thinking about painting the tank and side covers a red candy metallic, and maybe doing the pipes in a flat black, I don't know of that would look good or not.


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Old 04-23-2014, 12:40 PM   #15
bryantjt
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There's only a couple options for pipes and I would probably go 2 into 1 or make sure and get the kit that has the crossover (H pipe?) similar to the factory. From my reading when I had a 79 model, they could be finicky if they didn't have the exhausts joined together.

If you find your carb boots are dry/cracking you can get a set on e-bay that fit perfect for about half price of the OEM (when you can find them) but you will likely need to seal them to the head with silicone, at least I had to anyway.

Checking and adjusting the valves is very easy being screw and lock nut.

If you tip over on pavement, it will break the turn signal lens and potentially move the headlight since the stalks attach to the headlight ears. I bought a box of turn signals cheap on e-bay when my girlfriend was learning to ride.

Given the age of it, I would recommend replacing the front brake line. I went with stainless braided on ours.


www.hondatwins.net is a great resource for these machines.
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