tortron Posted September 11 Author Report Share Posted September 11 One thing I just noticed is conrods 1, 2, 3 are moving freely #4 a little less freely. For example the other 3 will flop down and rest on the case. #4 is able to stand up by itself. Can move it back and forth by hand and the engine was turning over fine with a spanner on the crank nut. Did seem to strain the battery on the starter, but I think that's due to my shit batteries as it spun fast on the jumper. Didn't make any death noises running It's been run up more than once, so I guess I will inspect the oil in the sump and the oil filter for expensive glitter 1 Quote Link to comment Share on other sites More sharing options...
GregT Posted September 11 Report Share Posted September 11 Is #4 the heavily oiled one ? Where the top looks like that, I've occasionally seen a lot of burned oil where it shouldn't be. Looks like the valve stem seals are well past it. Quote Link to comment Share on other sites More sharing options...
tortron Posted September 11 Author Report Share Posted September 11 yes, valve stem seals already in the post, probably werent done whenever the head was off, imagine they are plastic now., smoke was constant, starting about 20 seconds after start up and maintaining at all rpm and temperatures oil control rings felt a bit ho hum in terms of spring, but a ton of blowby probably got them sticky Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 11 Report Share Posted September 11 My 400 four and 550 all were funny on #4, and smoked constantly out the exhaust,i got a spair 400 engine and #4 was full of carbon on #4, i think its from people letting them idol on the side stand and it starves that side of the engine. Quote Link to comment Share on other sites More sharing options...
tortron Posted September 11 Author Report Share Posted September 11 Yeah I was actually thinking that being on the side stand has something to do with it as they seemed to be lowest point best, highest point worst #3 had the most paint burnt off the newly painted headers the rest were the same I might put an O2 bung in the exhaust but probably not one in each branch Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 11 Report Share Posted September 11 14 minutes ago, tortron said: Yeah I was actually thinking that being on the side stand has something to do with it as they seemed to be lowest point best, highest point worst #3 had the most paint burnt off the newly painted headers the rest were the same I might put an O2 bung in the exhaust but probably not one in each branch #3 with paint burnt off will be an air leek somewhere I garentee Quote Link to comment Share on other sites More sharing options...
tortron Posted September 11 Author Report Share Posted September 11 Press X to doubt, I have never had exhaust paint not instantly burn off Rubbers are in great cond, it wasn't wildly more burnt than the others Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 12 Report Share Posted September 12 4 hours ago, tortron said: Press X to doubt, I have never had exhaust paint not instantly burn off Rubbers are in great cond, it wasn't wildly more burnt than the others I meen if one cylinder is burning the paint off 1st and getting hotter, Rubbers may look mint but if they are even remotely hard they leak, Quote Link to comment Share on other sites More sharing options...
tortron Posted September 12 Author Report Share Posted September 12 Probably have to part out the bike if they are, don't think they are available Maybe weld 3 dr200 engines together 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted September 12 Author Report Share Posted September 12 Actually there's some stuff you can soak them in that softens them up apparently Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 12 Report Share Posted September 12 8 minutes ago, tortron said: Actually there's some stuff you can soak them in that softens them up apparently I tried with a solvent once but they expanded 3 times the normal size, silicon will work for a bit, use to do it all the time at the bikeshop when this old stuff was on the road on its last leags 1 Quote Link to comment Share on other sites More sharing options...
datlow Posted September 12 Report Share Posted September 12 Is it just a tube or silly proprietary honda shaped thing? Quote Link to comment Share on other sites More sharing options...
tortron Posted September 12 Author Report Share Posted September 12 Straight tube on these ones, the 550s I believe have an angled one It won't be an issue Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 12 Report Share Posted September 12 3 minutes ago, datlow said: Is it just a tube or silly proprietary honda shaped thing? Proprietary shaped honda things, i tried runbber hose on my cb900 and it didnt work, they have to be perfect of they leak, Quote Link to comment Share on other sites More sharing options...
tortron Posted September 12 Author Report Share Posted September 12 the 650s and 750s are different, from my brief sohc forum lurking 900s are clearly bent you didnt use enough red RTV also im wrong, they are available bout $30 for a china set $30 each for genuine 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted September 12 Author Report Share Posted September 12 THe internet over the last 10 years has gotten way better for finding parts, so good. was hard to even get gn250 stuff then, now i can surf the jack ma dropshipping wave and get anything Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 12 Report Share Posted September 12 I had to get a pair for a yamaha xt600 and the genuine ones were over $300 for a pair, i got aliexpress ones for $12 a pair and they are fine, At the time I could not get anything for my SOHC 750 and when i got NOS ones ther were hard, That little lip they have on the inside that sits into the grove on the carb is realy important and i think why normal hose didnt work, Quote Link to comment Share on other sites More sharing options...
Lord Gruntfuttock Posted September 12 Report Share Posted September 12 On 11/09/2021 at 11:41, tortron said: I used to start my morrie by popping the bonnet, holding the choke lever by hand, and pressing the in engine bay starter switch. So many crowds I used to start my Morry van by climbing out the back door with a crank handle. (broken driver's door and starter motor) Now THAT'S a crowd pleaser... 2 Quote Link to comment Share on other sites More sharing options...
governorsam Posted September 12 Report Share Posted September 12 Mate who recently sold his cb550 got parts from Everett’s in America? or Canada. said they had everything and good prices. barry/ Quote Link to comment Share on other sites More sharing options...
SOHC Posted September 12 Report Share Posted September 12 Try Malcom at econohonda 1 Quote Link to comment Share on other sites More sharing options...
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