Cb400n no start problem

farmer92 said:
don't be, i have a 78 cb400t, you can take the top end apart in 45 minutes if everything plays nice.
then it's easy enough to see if it was the top end or bottom end.

I suppose I'll have to replace gaskets if I pull it apart yeah?


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sully1987 said:
Tried doing this it spins over easier but still not quick and efficiently enough to start I don't think.....


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if i recall, it should do about 2 revolutions per second when the plugs are in. I never really used the starter in mine, i just gave a good kick.
 
farmer92 said:
if i recall, it should do about 2 revolutions per second when the plugs are in. I never really used the starter in mine, i just gave a good kick.

Unfortunately this model of the CB400N has no kick start


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Ha I thought it was seized to the shaft managed to get it off eventually, seems then generator cover is quite rusty and the stator may need to be rewound which isn't ideal.....


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Has anyone tried to rewind their stator themselves, seems like it's shagged but will cost me $300-$500 to get it done professionally and seems a bit steep


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Don't take this the wrong way but if you're struggling to take off a rotor then re-winding a stator is probably out of your league.


Maybe a used one off ebay? $300-$500 sounds pretty steep when you can get aftermarket new ones for most bikes around the $150 mark.


By the way - how do you know the stator is bad? Done any tests on it?
 
hillsy said:
Don't take this the wrong way but if you're struggling to take off a rotor then re-winding a stator is probably out of your league.


Maybe a used one off ebay? $300-$500 sounds pretty steep when you can get aftermarket new ones for most bikes around the $150 mark.


By the way - how do you know the stator is bad? Done any tests on it?

Haha won't take it bad, the difficulty of removal was to do with rust and the wrong tools to get it off, all sorted once I had a hardened steel bolt with the right thread pitch without paying for a Honda flywheel puller. Also didn't want to damage anything by being to forceful

Can't get them for cb400n's new they just don't exist. There was one on cmsnl.com new unfortunately that was €880 which is even more ridiculous. On research most places were like $250 US for a rewind on the net and that doesn't include postage both ways so will be about $500 Australian anyway. I would much rather buy one than do this but fixing it will cost almost more than what the bike did. So perhaps giving it a go myself could be an option worst case scenario it doesn't work and I get it rewound anyway.

Stator is shorting out to the casing there is no resistance between the test points. Continuity between the plugs and the casing also shows that it is shorting out somewhere. I rang an auto electrician and it was $90 just for them to test it before telling me whether it was stuffed or not. Also the resin is very very dark which from what I have read is a sure fire sign that it is done. Also the flywheel was quite rusty and deteriorated and there is no spark to the engine when it was installed. All sure fire signs that there is an issue.


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If you want to do this yourself it's probably not to difficult as long as you make sure of what you are doing.

1. Make sure you wind the same number of times as the original. This will maintain correct voltage

2. Use the same gauge wire
As what was on there. To small and it may overheat,
Too large is a waste of space.

3. Wind in the same direction. If it was wound clockwise, wind it clockwise.
You dont want to reverse the current.

Good luck :)
 
farmer92 said:
If you want to do this yourself it's probably not to difficult as long as you make sure of what you are doing.

1. Make sure you wind the same number of times as the original. This will maintain correct voltage

2. Use the same gauge wire
As what was on there. To small and it may overheat,
Too large is a waste of space.

3. Wind in the same direction. If it was wound clockwise, wind it clockwise.
You dont want to reverse the current.

Good luck :)

Thanks for the advice, just curious to I see a lot of people that have done it use this plastic stuff to insulate against the stator core or others have said just make sure the powder coating is intact, is it worth painting or powder coating it before I start the rewind? Or just use this plastic paper stuff


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The wires need to be insulated from each other, so I wouldn't worry about which method you use, both are redundant.
 
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