Author Topic: My 1975 Honda CB400F  (Read 945 times)

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Offline TeeNado58

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My 1975 Honda CB400F
« on: November 25, 2012, 08:55:13 AM »
Just purchased on 24 Nov 12 with a nice custom seat pan, fairing, clubman bars and awesome paint.  Engine needs improvement.  Next mods I have in mind are the exhaust system, replacement of center stand with a kick stand, replacement/upgrade of gauges, and some cosmetic detailing.



Offline Stev-o

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Re: My 1975 Honda CB400F
« Reply #1 on: November 25, 2012, 09:56:26 AM »
Welcome and nice bike.  Whatbimprovements does the engine need?
If you don't know the history, a "3000 mile tune up" may be in order.
'74 Honda 750K [836]   '77 Honda 750K project    76 Honda 550K cafe      plus plus plus



Offline jackseattle

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Re: My 1975 Honda CB400F
« Reply #2 on: November 25, 2012, 01:13:58 PM »
looks like a keeper, congrats
1976 400F
1971 450



Offline TeeNado58

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Re: My 1975 Honda CB400F
« Reply #3 on: November 27, 2012, 09:00:12 AM »
The engine runs a little rough - will not hold an idle at stop lights.  She starts right up and you have to get off the choke real quick - makes me think it's running rich?  Previous owner said he replaced seals and gaskets.  I am looking for carb rebuild kits and will probably tackle this during the winter months.  It has over 27K indicated but I don't know the accuracy of the odometer.  I will start with some basic maintenance to ensure she is protected.

I really enjoy the forums and the vast amount of information, ideas and assistance they offer, thanks.



Offline Stev-o

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Re: My 1975 Honda CB400F
« Reply #4 on: November 27, 2012, 09:41:00 PM »
Some engines don't need choke unless super cold.  Adjust idle when fully warmed up, I like mine a little high around 1500 rpm.
'74 Honda 750K [836]   '77 Honda 750K project    76 Honda 550K cafe      plus plus plus



Offline MoMo

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Re: My 1975 Honda CB400F
« Reply #5 on: November 28, 2012, 08:53:33 AM »
Looks good.  The pods probably don't have anything to do with the idling/performance isse :P :-\.    Had the bike been sitting?  If so, the carbs will need to come apart as most all 400 fours clog up in the midrange/emulsifier jets after sitting for an extended period of time .  3000 mile service as mentioned and enjoy the ride.   And welcome...Larry
Present: 1975 CB750, 1974 CB750, 1975 CB400 four,  1966 Suzuki S32 150cc , 1984 Honda Sabre, 1998 Pacific Coast (my daily rider) ,  ALL FOR SALE EXCEPT THE SUZUKI!

Past: Two Honda XL125s )(I rode one in enduros), Honda XL175, Yamaha DT1, MZ 250 ISDT, Harley Hummer, 1969 Honda CB350, 125 Sachs/DKW, 250 Ossa Pioneer, 1968 250 Montesa La Cross, Yamaha RD350, two Yamaha TX500, eight Honda CB450 dohc, 250 KTM, 1982 Yamaha 650 four(worst bike ever owned), seven Honda CB400f's, 1983 Honda VF750F Interceptor, 1981 CB650, 1973 CB350G, two 1973 CB750s, mint 1975 Honda CB550F, two 1977 CB750K7s , two GL500I Silverwings, 1973 Jawa 175 Trailmaster, SL350 K2, 1970 CB750K0, 1972 CB350, 1974 CZ 250 Enduro, and  probably others long forgotten.



Offline TeeNado58

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Re: My 1975 Honda CB400F
« Reply #6 on: December 24, 2012, 02:53:38 PM »
Thanks to all for the comments and welcomings.  I have decided to switch out the frame (the kickstand lug was removed from the current frame) and while transferring everything rebuild the engine and carburetors.  I already purchased a MAC 4-1 black exhaust system, and it sure sounds a lot better.  While the bike is down I want to totally go for a "bumble bee" approach - everything that is not yellow at this time will get powder coated a matte black. I am also going to add front and rear turn signals to make the bike more street friendly.

I am having a hard time finding a engine rebuild gasket set for this bike - any suggestions out there?  I scour eBay, Craigslist and get Google and Bing to overheat searching for a source...

Thanks for any and all assistance

Merry Christmas!



Offline MoMo

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Re: My 1975 Honda CB400F
« Reply #7 on: December 24, 2012, 03:01:28 PM »
Vesrah makes a decent gasket kit  http://4into1.com/vesrah-complete-gasket-set-vg-158-honda-cb400f/   ...Larry
Present: 1975 CB750, 1974 CB750, 1975 CB400 four,  1966 Suzuki S32 150cc , 1984 Honda Sabre, 1998 Pacific Coast (my daily rider) ,  ALL FOR SALE EXCEPT THE SUZUKI!

Past: Two Honda XL125s )(I rode one in enduros), Honda XL175, Yamaha DT1, MZ 250 ISDT, Harley Hummer, 1969 Honda CB350, 125 Sachs/DKW, 250 Ossa Pioneer, 1968 250 Montesa La Cross, Yamaha RD350, two Yamaha TX500, eight Honda CB450 dohc, 250 KTM, 1982 Yamaha 650 four(worst bike ever owned), seven Honda CB400f's, 1983 Honda VF750F Interceptor, 1981 CB650, 1973 CB350G, two 1973 CB750s, mint 1975 Honda CB550F, two 1977 CB750K7s , two GL500I Silverwings, 1973 Jawa 175 Trailmaster, SL350 K2, 1970 CB750K0, 1972 CB350, 1974 CZ 250 Enduro, and  probably others long forgotten.

 

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