SOHC.co.uk Forums > CB350/400
What a Shame..!!
z1100r:
Back on the case..... my O-rings arrived...4mm id 1mm section seem to do the trick perfect.
My mate turned up with the head...Firstly its a black painted mess...its been 'chiselled' off its previous engine, gas flowed by an idiot, and half the exhaust studs are snapped or stripped. Oh and a Broken fin at the front...valves and guides seem good though, and not a mark on cam bearings...strange. So a quick wash down and both heads in the oven tonight for valve and guide swap.. Should be riding this by the weekend. Will knock out the broken ones first just to see what happens and how dodgy they are to do.
Must remember to take my camera in the garage tonight.
z1100r:
Well valve guides were no problem...oven on 220 and tapped them out...cooled em off and bumped them back in the proper head...all done in minutes and real easy.
Bike ran like a bag of crap though. Had washed out tank and thought all would be OK. oh no it wasn't. Mesh bit had rotted away on tap and tap was blocked solid with crap. Ran bike on temporay plastic bottle for a while but still crap. Carbs off again to find nothing wrong until i happened to notice quite by accident then when blasting air line down main jet hole on 3 of the carbs air was blast out the back brass pipebut on no.2 carb nothing. Drills out again. THat fixed it. Balanced carbs and away it went, cruising down the road and sudden mega racket. The back end plate of the exhaust silencer blew apart and al the contents flew out. A few miles later and she ground to halt again due to crap comming from tank blocking tap. Shoved a cam chain and load of nuts and bolts in tank and shook it about but not much crap came out...still doesn't take much I suppose if it goes down the tap. Gotta wait for a new tap and an airfilter now. I cant tell how its running really with that noisy noisy silencer.
By the time I've finished this thing is going to of cost a few quid.
Battery, silencer, sprocket set, oil filter/oil, clutch cable, master cylinder kit, head off for valves etc, hours and hours on carb cleaning, airfilter, petrol tap. It has to be a labour of love dont it.
z1100r:
£100 for a pattern silencer from DS..mind you thats nothing compared to 900 quid odd for the original pipes holy crap.
I went up my loft to my spares supply. I knew a while ago I had bought a couple of reverse cone shortie silencers for my pair of 500 brit singles and they came with multiple collars to fit most sizes of pipe. Cost £27 each.
Well talk about being made for the job...it looks and sounds lovely and fitted a doddle. Another £25 to this guys bill though. I'm guessing he's going to get a £300 bill for putting this thing back on the road. Does that seem reasonable considering all the work and parts, I think so. He's on a bloody cruise for his Ruby wedding so not been able to confirm the spending. I remember another of my mates mate only paying £300 for a whole running reasonble 400 four not that long ago. Oh dear. This is an exceptional specimen though. Should have a proper silencer really but he can buy and fit that himself.
Its just sitting there waiting for some more DavidSilver 'gold' to arrive at the moment. Will go up and give it a clean and have a photo shoot tonight. Its even got its original Bridgestones. Scary. Lol
Blimey the mega's have gone up.
http://britishbikebits.com/unbaffled-universal-megaton-reverse-cone-chrome-silencer-1-3-4-1-3-8-inlet
tom400f:
Sounds a bit like mine - it had 1,800 miles when I got it, now only 2,200...
My silencer seems OK after a long lay-up. Some bits have come out but the end plate seems sound and it seems to work. Of course may not stand up to real use as its only been started recently. Down pipes/collector could use a rechrome but sound. Everytyhing else is fine.
I also have original tyres (not fitted!)
z1100r:
Tom,
Sounds very similar. On this one the header pipes are mint, actually look brand new. The silencer though showed bulging on the outside where the baffling was spot welded in. The first thing that happened was a large hole appeared in the recessed back bit next to the exit hole. The insides had allready well rusted and collapsed - you could here them rattling about, and exhaust was noisy. I was giving the bike a bit of a gunning when the sound levels rose to unbearable and the whole lot disintegrated.
Wheel rims are good, spokes are average, chainguard is mint, all handlebar controls, headlight etc mint, mudguards very good - not polished them up yet to see just how good. Paintwork could be new, not even a scratch. Engine paint not as good as I first thought. All ancillary components and brackets really good and everything comes undone no problem.
I cant remember how fast these things go, speedo said 90mph upright against wind and it seemed about right. Took a while to get there though. Acceleration is tame and requires lots of revving. Tootling about upto 60/70mph is absolutely lovely (I must be getting old). I'm 5'11 but I still find it quite comfortable - especially compared to my Thunderace.
I do have a soft spot for these SOHC bikes, I raced a 550 and won a club championship on it, my mates had them as road bikes and they were all thrashed to absolute near death racing RD's but unlike the RD's - no blow ups that I can remember. They were 460'd, yoshimura'd, piper'd and ace bar'd. fancy seats , crappy paint jobs, culminating in total abuse. I bet most of them would still go with a little tlc. lol
Looking forward to a quieter less eventful ride in a few days. No more 'carb tuning' required I hope, it should be back to how it should be. A smooth quiet pleasing little thing.
I wont want to give it back.....he wont use it...I bet its on Ebay in a few weeks.
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