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Post by icarus001 on Sept 28, 2013 19:27:19 GMT 1
It went last weekend but I've only just got round to having a look. I went out for a blast, got a few miles in and decided it wasn't running right so slowed down, then it got worse, so I turned for home, just about made it and it conked out on the drive. I wondered if it was just blocked jets or something, it started today, but instantly I knew it was buggered, hardly anything coming out of the left exhaust. No idea whats caused it, I thought the top ring had caught a port but maybe a metal reed has snapped off and bounced around first, no idea until I pull it apart. It won't go back on the road now until next summer, I've got too much on and too many things needing time and money first. I've got 7-8 months to get it back to full health, I'm only a summer rider.  |
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Post by lovelydog on Sept 28, 2013 19:39:09 GMT 1
Yuk. I'm glad you don't need it for tomorrow mate,hope it doesn't work out too expensive.
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Post by majortom on Sept 28, 2013 21:44:32 GMT 1
Dude , looks ugly, hope not too costly ?
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Post by calum64 on Sept 28, 2013 21:59:04 GMT 1
That's why we love them
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Post by stanlc7189 on Sept 28, 2013 22:28:13 GMT 1
In June 1981, I bought a brand new 350 Mars Bar. In October, I rode it two up with top box, throw over panniers and a tank bag to what is now Croatia. Continuous heavy rain through Germany and Austria but the bike never missed a beat, cruising all day at 80-90 mph. Had a great holiday and the return journey was was just as uneventful, bikewise.
Fast forward 32 years and I now have an '82 candy blue 350, which I've owned for two years and already rebuilt the engine after a blown crankshaft. Now, I worry when I go for a 20 mile blast. My stomach turns at the thought of riding it to the coast and back from Derby, so I never do. Wallet, AA card and a mobile phone fully charged up are the first items I make sure I have. Yet, despite all this, I still love riding it almost as much as my 750 Gixxer. Sure, it's in a different performance league and you have to plan overtakes as opposed to just opening the throttle and overtaking 4 or 5 cars in one go. But the sound, smell and envious looks from bikers when it's parked up make up for its obvious shortfalls. It's an iconic bike for the connoisseur. It needs constant fettling to keep it sweet, but that's part and parcel of LC ownership and why we love them. I'll never sell it.
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Post by marsbar350 on Sept 28, 2013 22:40:46 GMT 1
well said stan theres guys with lcs take enough tools out with them to strip and rebuild the bike mine gets filled with oil and petrol and thats it.no spare plugs etc but i do have breakdown and a fully charged mob phone  |
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Post by Norbo on Sept 29, 2013 7:44:21 GMT 1
Sorry to hear about that hate . some times it just happens but at least its all just shot out the exhorts and the back wheel didn't lock up or the ring jam in the cylinder.
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Post by icarus001 on Sept 29, 2013 9:11:21 GMT 1
Sorry to hear about that hate . some times it just happens but at least its all just shot out the exhorts and the back wheel didn't lock up or the ring jam in the cylinder. Yep agreed, a few minutes earlier I'd been flat out on the tank trying to catch up with the other lads. It was only when we dropped down to 30mph to go through a village that it suddenly started to feel strange, it felt like I was running out of petrol and needed to go on reserve, but putting it on reserve had no effect, so at that point I turned round and pointed it to home. By the time I'd done the 6 miles home it was making a racket and I knew it was buggered. If it had nipped up while I was flat out then I might be typing this from a hospital bed, or worse. I really fancy rebuilding it myself, but I've only ever done top end rebuilds, and although I'm an engineer I'm a bit reluctant to take it on and I don't have the kit to check if the crank needs doing, or the kit to remove the fly wheel, clutch, etc. So it looks like I'll have to drop it in to someone to get it sorted. Not much point doing the top end on my own, for all I know the bottom end is knackered as well, might as well have it all checked over. I'm not a million miles away from Mick Abby, so once I decide how I'm going to pay for it I'll perhaps give him a bell. |
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Post by icarus001 on Sept 29, 2013 9:17:24 GMT 1
And thinking about it the signs have been there for a while, I had my oil pump done by Arrow and it was putting a bit more oil through than standard, but the left exhaust was never as smokey, I have clear oil lines so I know oil was going through, but perhaps the ring has been a bit dodgy for a while and compression had been down on that side.
I wonder if the ring had gone some time ago and it was running just on one ring, I had that before on an old RD125, the top ring went and I only noticed when I changed the exhaust and had a look into the bore. You could see from the bore that the bike had been running on one ring for ages.
So the ring might have gone ages ago and its just gradually knackered the piston. It still runs now, but rough as buggery.
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Deleted
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Post by Deleted on Sept 29, 2013 9:20:27 GMT 1
Micks a good bloke but always busy
If you can get engine to kp motorcycles in Leeds he would be able to rebuild it
Kev is also a member on here and is an old skool mechanic. Does rebores, crank rebuilds, balancing he even straightened a Lc frame a few weeks ago
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Deleted
Deleted Member
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Post by Deleted on Sept 29, 2013 9:25:40 GMT 1
0113 2351232 is the number ask for Kev open from 930 to 4 except Wednesdays when he's shut all day and open til 2 on a saturday
He did Denzil's crank and rebores and he's had no trouble since and also did my rebore and mot'd norbos Steve baker special
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Post by icarus001 on Sept 29, 2013 9:39:07 GMT 1
0113 2351232 is the number ask for Kev open from 930 to 4 except Wednesdays when he's shut all day and open til 2 on a saturday He did Denzil's crank and rebores and he's had no trouble since and also did my rebore and mot'd norbos Steve baker special Thanks, I'll bear it in mind. I live in Lancaster and there is also a bloke nearby that rebuilt Scruffs engine. I fancied a mild road tune though and I hear Mick is the man. To be honest I'm in no rush, if I took it today and didn't get it back for 6 months it wouldn't be a problem, I've got other things on the go at the moment and it will take a while to find the cash for a full rebuild and tune, plus I need my forks resprung with new bushes and seals and a new rear shock....as well as a new shotgun to buy before Xmas and a five figure cruise to pay for that the missus decided we're going on. I'll have to start selling my body  |
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Deleted
Deleted Member
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Post by Deleted on Sept 29, 2013 10:15:28 GMT 1
If you are going to get a new shock get a intron shock mine is brilliant and I have lc2 forks. Changed the fork oil and put 5 psi in them the other week and bike is loads better
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Deleted
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Post by Deleted on Sept 29, 2013 10:17:39 GMT 1
Mick is definitely the man to port your barrels though
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Post by icarus001 on Sept 29, 2013 11:02:29 GMT 1
If you are going to get a new shock get a intron shock mine is brilliant and I have lc2 forks. Changed the fork oil and put 5 psi in them the other week and bike is loads better Yep thats the plan, a Nitron shock. My forks are TZR 2ma, so they need new springs to my weight and then new seals and bushes. |
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Post by icarus001 on Sept 29, 2013 21:32:11 GMT 1
 Looks like that barrel is knackered, its took a great big chunk out around the exhaust port. I've never seen one that bad before so don't know what can be done with it. The ring dowel came out, the ring spun round and caught in the port, obviously I knackered it properly by riding the 6 miles home like that. The crank looks ok, although I haven't measured anything. I was told it had been rebuilt 2,000 miles ago and I've done about another 2,000. It all looks nice and clean inside. I'm not sure about the oil though, the picture below shows a definite difference, the left intake port is bone dry, there is oil on the crank and its not scorched or anything like you might expect if it had been getting hot and starved of oil. But it doesn't look right to me, I wonder if the carb oil port is blocked.  |
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Post by marsbar350 on Sept 29, 2013 21:41:02 GMT 1
id say the same oil feed in the carb is blocked had seize not long back and it aint funny  |
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Post by arrow on Sept 29, 2013 21:46:13 GMT 1
Sorry to hear about this. As you say, have a look at the carb oil hole, put a piece of pipe on it and try blowing down it to see if its clear.
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iainw
Drag-strip hero
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Post by iainw on Sept 29, 2013 22:17:01 GMT 1
Oh dear!
Where's the gasket for the reed block on the l/h side? Is it on the block or is it missing? If it ain't there then the chances are that it was sucking air in and running lean on that side, a blast at WOT will suck loads through the tiniest gap. What does the piston crown look like?
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Post by icarus001 on Sept 29, 2013 22:27:16 GMT 1
Oh dear! Where's the gasket for the reed block on the l/h side? Is it on the block or is it missing? If it ain't there then the chances are that it was sucking air in and running lean on that side, a blast at WOT will suck loads through the tiniest gap. What does the piston crown look like? The gasket is on the reed block. The crowns look fine, good colour,it wasn't sucking air in. The ring dowel is the cause, it was in the crankcase, but maybe a partially blocked oil port in the carb hasn't helped. For the last couple of months when it was warming up the right exhaust smoked like hell, the left was never as bad. Its my own fault for leaving it and not checking. |
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Post by arrow on Sept 29, 2013 23:21:25 GMT 1
It sounds like the r/h check valve may have been passing, problem is this can happen at anytime, it only needs the tiniest particle in the oil circuit for this to happen and the spring only puts very light pressure on the ball. Weather it was passing or not it would not be a factor to the failure on the left, but may explain the excess smoke on the right.
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Post by whoisthatdc on Sept 30, 2013 18:09:31 GMT 1
Fast forward 32 years and I now have an '82 candy blue 350, which I've owned for two years and already rebuilt the engine after a blown crankshaft. Now, I worry when I go for a 20 mile blast. My stomach turns at the thought of riding it to the coast and back from Derby, so I never do. Wallet, AA card and a mobile phone fully charged up are the first items I make sure I have. Yet, despite all this, I still love riding it almost as much as my 750 Gixxer. Sure, it's in a different performance league and you have to plan overtakes as opposed to just opening the throttle and overtaking 4 or 5 cars in one go. But the sound, smell and envious looks from bikers when it's parked up make up for its obvious shortfalls. It's an iconic bike for the connoisseur. It needs constant fettling to keep it sweet, but that's part and parcel of LC ownership and why we love them. I'll never sell it. I read this and laughed out loud I could have written it ,It is so me glad I am not alone |
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Post by steeley on Sept 30, 2013 18:49:20 GMT 1
check the oil inlet in the carb ,have had an engine recently with the r/h carb inlet blocked.
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Post by icarus001 on Sept 30, 2013 19:42:32 GMT 1
check the oil inlet in the carb ,have had an engine recently with the r/h carb inlet blocked. Thats what I reckon it was. |
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brads
Weekend rider
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Post by brads on Oct 1, 2013 12:32:40 GMT 1
Yip, that's happened to me twice already (blocked oil feed hole in carb that is!)
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Post by Denzil on Oct 1, 2013 19:24:03 GMT 1
Can confirm that the rebore was superb. The cross hatching looked good with no issues. Thanks to RDLC Crazy for helping me out and Kevin the man for doing the work.
He is the man.
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