Author Topic: Just about done  (Read 492 times)

Offline ogri211

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Just about done
« on: June 12, 2018, 08:43:03 PM »
Ive just about finished my four four everything seems to work OK apart from I have a bit of smoke I think I will have to take my top end off when I get home I either have a dodgy valve or Ive nipped a scraper ring , The bike runs fine apart from that I have done about 150 miles so far.
Triumph Rocket3, Suzuki GT 750A, Kawasaki H1B, Honda 400 Four, Triumph Speed Triple

Offline Davelu88

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Re: Just about done
« Reply #1 on: June 12, 2018, 08:57:37 PM »
Very nice indeed :)

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: Just about done
« Reply #2 on: June 12, 2018, 10:03:11 PM »
That looks beautiful, a real credit to you.
Im a Nurse, trust me, this won't hurt.....much !!!

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Offline Man Of Kent

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Re: Just about done
« Reply #3 on: June 12, 2018, 10:22:17 PM »
Very nice example, good on you. :D

Offline UK Pete

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Re: Just about done
« Reply #4 on: June 13, 2018, 10:22:24 AM »
Looks great
Does the top end come of with engine in frame

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Offline billywingnut

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Re: Just about done
« Reply #5 on: June 13, 2018, 12:55:31 PM »
nice job mate, I once had smoke on a triumph cub after rebore and new piston, it turned out I had put the scraper ring in upside down.

Offline Nurse Julie

  • 1973 CB750 UK K2.1977 CB550/4 Mongrel Brat. 1978 CB400/4.
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Re: Just about done
« Reply #6 on: June 13, 2018, 01:29:39 PM »
Looks great
Does the top end come of with engine in frame

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Yes they do Pete, plenty of clearance unlike the CB750's  :'(
Im a Nurse, trust me, this won't hurt.....much !!!

LINK TO MY CB400/4 ENGINE STRIP / ASSESSMENT AND REBUILD...NOW COMPLETE
http://www.sohc.co.uk/index.php/topic,14049.msg112691/topicseen.html#new

Offline ogri211

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Re: Just about done
« Reply #7 on: June 13, 2018, 09:16:38 PM »
I didnt fit my rebored barrels and pistons as the ones on it looked in very good condition but had a few broken cooling fins, but I managed to successfully get them welded and then dress them up. the barrels looked as if they had been done recently as there was no wear and the hone marks were still there, I think it is more likely a valve guide that is worn I lapped the valves and fitted new seals but it has the symptoms, rev it at a standstill and it smokes but if im going along the road it doesnt.
 
Triumph Rocket3, Suzuki GT 750A, Kawasaki H1B, Honda 400 Four, Triumph Speed Triple

Offline ogri211

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Re: Just about done
« Reply #8 on: June 13, 2018, 09:19:11 PM »
Another thing I used a cheap gasket set from ebay I read somewhere that a faulty head gasket can cause it to burn a bit of oil.
Triumph Rocket3, Suzuki GT 750A, Kawasaki H1B, Honda 400 Four, Triumph Speed Triple

Offline Johnwebley

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Re: Just about done
« Reply #9 on: June 13, 2018, 09:20:04 PM »

  it doesn't sound serious,give it at least 1,000 miles and see what happens,did you fit new rings ???
lifelong motorcycle rider,and fan

Offline ogri211

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Re: Just about done
« Reply #10 on: June 14, 2018, 04:09:45 AM »
No I never but maybe I should have. I gave the liners a hone.
Triumph Rocket3, Suzuki GT 750A, Kawasaki H1B, Honda 400 Four, Triumph Speed Triple

Offline UK Pete

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Re: Just about done
« Reply #11 on: June 14, 2018, 07:03:00 AM »
I would of fitted new rings . I think there lies your problem

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Offline ogri211

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Re: Just about done
« Reply #12 on: June 15, 2018, 06:55:47 PM »
I think you may be right thinking about it, for me to hone the barrels and refit the old rings doesnt make sense, I have a brand new set of Cruising image piston kits that are the same oversize as my barrels, I think I will order some Honda circlips and gaskets and try fitting them when I get home.
Triumph Rocket3, Suzuki GT 750A, Kawasaki H1B, Honda 400 Four, Triumph Speed Triple

Offline UK Pete

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Re: Just about done
« Reply #13 on: June 15, 2018, 07:20:01 PM »
Check the end gap when you fit them
Btw I am going to a bike rally in August called the ogri

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Offline Laverda120

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Re: Just about done
« Reply #14 on: June 15, 2018, 09:08:36 PM »
Lovely looking bike. My first 400/4 was a red one. Hope you find the problem.