Author Topic: Hole in motor! (Read 1306 times)

Calumjs · « **on:** December 03, 2014, 04:31:43 PM »

Can anyone tell me what the hell is poking out of my motor??!!

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chewbacca5000 · « **Reply #1 on:** December 03, 2014, 04:39:58 PM »

I don't see anything. Point to the problem and post another pic.

Vinhead1957 · « **Reply #2 on:** December 03, 2014, 04:43:57 PM »

Year and cc?

MidnightLamp · « **Reply #3 on:** December 03, 2014, 04:55:10 PM »

that's the 12mm bolt on the end of one of your transmission shafts on a CB400F, pull the cover (drain oil first, it holds oil) to see what's going on....hopefully it's not bad....

Calumjs · « **Reply #4 on:** December 03, 2014, 04:55:30 PM »

You can't see the bolt smashing through the clutch cover?? Cb400

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Calumjs · « **Reply #5 on:** December 03, 2014, 04:55:53 PM »

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KiefRichards · « **Reply #6 on:** December 03, 2014, 04:57:56 PM »

this?

Calumjs · « **Reply #7 on:** December 03, 2014, 04:58:19 PM »

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Calumjs · « **Reply #8 on:** December 03, 2014, 04:59:19 PM »

Quote from: KiefRichards on December 03, 2014, 04:57:56 PM

this?

Yeah it was the bolt that bolts on the gear in the bottom right hand corner, what does that gear do?

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MidnightLamp · « **Reply #9 on:** December 03, 2014, 05:05:31 PM »

Quote from: MidnightLamp on December 03, 2014, 04:55:10 PM

that's the 12mm bolt on the end of one of your transmission shafts on a CB400F, pull the cover (drain oil first, it holds oil) to see what's going on....hopefully it's not bad....

It is the drive gear for trans/primary...you should make sure there's no damage on the back of your clutch basket or on the bearing behind that gear. There are also probably now shavings throughout your motor so you'll want to clean the oil screen at a minimum.

Calumjs · « **Reply #10 on:** December 03, 2014, 05:09:35 PM »

It didn't happen whilst riding it happened when I was trying to start it. I dropped the oil and found no metal in the oil and when I took the engine cover off there was no shavings in there either,but I did find this little thing in there, any ideas as to what it is?

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Calumjs · « **Reply #11 on:** December 03, 2014, 05:10:24 PM »

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oldhatt45 · « **Reply #12 on:** December 03, 2014, 05:27:10 PM »

Look at the picture in reply #6.
Toward the top of the picture just to the right of center you can see what looks like 2 more of them.
Maybe the piece is a third one?

?

Charlie

MidnightLamp · « **Reply #13 on:** December 03, 2014, 05:29:23 PM »

Looks like a piece broken off the shift stopper (Y shaped piece behind the clutch surrounding the shift drum). It's been a long time since I've worked on 400F's so I'm really fuzzy =\

Calumjs · « **Reply #14 on:** December 03, 2014, 05:48:07 PM »

Yeah looks like the stopper part number 176. Where the hell will I find one of those?

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Calumjs · « **Reply #15 on:** December 03, 2014, 05:49:13 PM »

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05c50 · « **Reply #16 on:** December 03, 2014, 06:39:48 PM »

There's a couple on ebay. Here's one of them http://www.ebay.com/itm/1975-HONDA-CB400F-SUPER-SPORT-TRANSMISSION-SHIFT-PAW-/260987556055?pt=Motorcycles_Parts_Accessories&hash=item3cc41210d7&vxp=mtr

...............Paul

Don R · « **Reply #17 on:** December 03, 2014, 10:37:24 PM »

did the bolt just back out?

Calumjs · « **Reply #18 on:** December 03, 2014, 11:52:14 PM »

Quote from: Don R on December 03, 2014, 10:37:24 PM

did the bolt just back out?

Certainly did, backed out and pushed through the cover.

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strynboen · « **Reply #19 on:** December 04, 2014, 10:32:07 AM »

mine 400 f have rubbed.. some marks there..but not broke through.
.a kommon problem..lockteit after cleaning all oil of the threds...but renember to heat if it ever have to be removed later..it make the lockteit soft

got the parts broken tig veldet..then you are fine..and new oil filter and vash engine inside..and you are ready for next seson

Kevin · « **Reply #20 on:** December 04, 2014, 10:48:35 AM »

Exact same thing happened to me (after I rebuilt my engine).....Live and learn!
The really crappy part was that I had polished and clear coated that cover. I still have it hanging on the wall in my shop.

Bummer...:-(

Calumjs · « **Reply #21 on:** December 04, 2014, 04:22:24 PM »

Thanks, I live in Australia so every day is riding season!

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Don R · « **Reply #22 on:** December 06, 2014, 10:05:33 PM »

I see, and once it contacts the inside of the cover it just grabs the cover and spins right through.

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Author Topic: Hole in motor! (Read 1306 times)

KiefRichards