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Post by yamark on Aug 14, 2022 15:36:00 GMT 1
There is a reason a lot of the previous multi cylinder Lc's ( and other strokers) have been built to run on premix - because it so bloomin hard to do right with a pump! I just hope the peeps that see this at Stafford, who are not involved with this forum, can appreciate just how much effort has gone into making this all work. Sheer genius ! Dusty Thanks Dusty, I don't think it's a big deal- just the way my "anorak brain" works
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Post by yamark on Aug 14, 2022 16:33:21 GMT 1
I painted the YPVS genny cover and fitted it SDC12240 I also painted the chain guard and fitted it with new Honda bolts, it sits at a much better angle with the new front mount. SDC12241Clutch cover fitted, and clutch cable. It's from a YBR125 custom, Yogi gave me the heads up on the cable SDC12242 Second choke and airbox rubbers fitted SDC12245 The carbs for cylinders 1 and 2 fitted SDC12247 This means I can start to fit the oil lines and check valves SDC12248Now, the Suzuki pump outlets, check valves and oil lines are a smaller bore than Yamaha's. So the pump to check valves are Suzuki. I need to convert the outlet side of the check valve to Yamaha's bore. So I make 4 reducers in brass on the lathe SDC12249 So the oil line in this image is Yamaha's, to be fitted to the oil spigot on the carb. The stub on the check valve is the inlet (directional), which connects to the pump. SDC12250 I want to thank, at this point Stusco who provided me with the check valves. I'm humbled again, by the generosity of Forum members. Stusco sent me the valves a while back, simply refusing and money for them. He just thought "I might be able to use them". I never forget people who do me favours, there are many of you on this Forum. He is a class act, thank you again mate Next week, I organise the oil lines and make a start on the throttle cable. Cheers everyone for you interest, Mark
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Post by jon on Aug 14, 2022 17:01:33 GMT 1
Hi Mark, No your not boring the tits off of us. I sometimes have people comment on the thread I started about eBay chancers. They can’t see why some of us winge about prices. It’s partly to warn the newbies. Anyway as with both threads you know what they are about, so if you you don’t like the subject matter, don’t read or comment. I like your build so am interested in every detail. Jon Thanks Jon, it's a brilliant thread you created. I dislike the way people hike up prices on Ebay- the inflated price quickly becomes the new norm and this upward spiraling circle means most of us can't afford to build bikes. I recently did the Kempton Park autojumble with Dusty. A brilliant day with Dusty. I had a set of mint Micron GP pipes for an LC, sold them to what I thought was an enthusiast for £330,the next day they were on Ebay for £1,000 . 250LC pipes, VGC I sold for £220, on Ebay next day advertised as 350 pipes £750! Anyway Jon, I know it's a while back, but you played a pivotal part in the early stages of this 700 build. Your work was far more impressive than the fabricator I used for the triple build. I am still grateful mate Thanks Mark for the kind words. I always like to help fellows enthusiasts if I can. Far too many people out to make as much money as possible from our persuasion out there. Jon
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Post by steve63 on Aug 14, 2022 20:47:35 GMT 1
More great work done there Mark. All them little jobs being ticked off your list one by one. It'll soon be time to pop the bubbly!
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Post by JonW on Aug 15, 2022 0:52:37 GMT 1
Agreed, defo not boring. Thos who dont want to learn should stay away. I think the advice and knowledge on here is a tonic and builds like this are all about leaning for most of us.
Keep up the good work.
PS. I know the hose clamp advice digs are tongue in cheek on here but 'better is better', just cos yam use cheap stuff doesnt mean we all should. Better engineered is best, its not like Mark or any of us are throwing together cheap bike projects. We are all building the best we can and its pushing the hobby forwards over what it was 20 or even 10 years back etc.
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Post by Denzil on Aug 15, 2022 7:34:12 GMT 1
The devil is in the detail, top notch build and very enjoyable for me to watch it all come together. Stunning workmanship, just looking at the two carbs with the choke, anyone looking in would say "That looks OEM " Amazing and thanks for sharing it all to us.
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Post by donkeychomp on Aug 15, 2022 22:15:04 GMT 1
Hang on. Honda bolts?? Alex
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Post by yamark on Aug 16, 2022 16:33:56 GMT 1
The devil is in the detail, top notch build and very enjoyable for me to watch it all come together. Stunning workmanship, just looking at the two carbs with the choke, anyone looking in would say "That looks OEM " Amazing and thanks for sharing it all to us. Thanks Denzil, I try to achieve the look of a bike updated by Yamaha. I've made so many bespoke brackets, I've lost count. Thanks for your kind words mate
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RD700LC
Aug 16, 2022 16:40:46 GMT 1
Post by yamark on Aug 16, 2022 16:40:46 GMT 1
Hang on. Honda bolts?? Alex I was hoping that the Honda bolts would go under the radar The chain-guard matches the swing arm (Honda NC29), the guard is held on by shouldered, flanged bolts. I had to use them Alex, it wasn't a moment of weakness
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Post by donkeychomp on Aug 16, 2022 21:35:56 GMT 1
I forgive you Mark. Needs must!
Alex
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Post by yamark on Aug 21, 2022 15:39:37 GMT 1
With the oil lines and check valves sorted, as well as the carbs ready to be fitted, I need to sort the last challenge - the throttle cable. I'm using an RG500 cable because far as I know, it's the only cable with a 5 way splitter. I'll be using the splitter and the 4 carb cables from the RG cable, a standard LC oil pump cable, and an aircooled RD250 twistgrip to splitter cable. The front section (RD250 part), fits the splitter well, the LC oil pump section fits after I carefully drill out the cable exit in the RG splitter. That leaves shortening the RG carb cables to fit the 4/ 31K carbs. I'm going to have to make some cable ends, so I can solder them on to the cut inner cables First, I drill the center on some brass rod SDC12251 I then drill a 1.5mm diameter hole fairly deep in the rod SDC12252I then drill and form the area where the cable will be splayed and soldered SDC12253 Next, I reduce the diameter to 3.4mm SDC12254 I then cut it off to the required length SDC12255 And then repeat, to make the 4 cable ends. They are tiny SDC12256I've got to source LC type carb cable adjusters that have an 85 degree swept bend, for the 2 outer cylinders. Standard cable adjusters will hit the fuel tank Cheers, Mark
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Post by steve63 on Aug 21, 2022 16:30:07 GMT 1
Another great bit of work Mark. Good idea putting them in a little bag. I would leave them on a shelf and lose one I had a quick action throttle on my TS100 the origins of which were un-known. It snapped on me a couple of times and I had no idea where to get a cable from so I used to make a barrel nipple out of a piece of nail, cut, drill and solder the cable in. That lath is a very useful if not essential bit of kit for this project .
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Post by jon on Aug 21, 2022 16:46:34 GMT 1
Hi Mark, a bit waste/time consuming on the OD of those nipples, but I know what it’s like to only have certain stock left.
The drill bit for the chamfer looks the standard 120 degree? I’ve got a tool I use for that sort of thing that cuts at a much sharper angle.
You should be ok if you leave a rounded blob of solder on the end.
I love all these special little fabrications that most people wouldn’t be able to do themselves, or realise there necessary and bodge it accordingly.
Can you not heat the standard LC elbows no bend further? Hopefully they wouldn’t collapse? Maybe a stripped of plastic outer cable could be inserted before the bending? Reduced in diameter if need be?
Jon
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Post by Tobyjugs on Aug 21, 2022 18:47:04 GMT 1
Hi Mark I'm sure you could make the bends yourself. The die needed for the thread is also not too expensive. You can also get teflon tubing which is used in 3D printers to line the inside of the bend for a silky action.
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Post by mouse on Aug 21, 2022 18:59:51 GMT 1
Such finite little jobs but vital to finishing this project.
There is so much work in this bike that people will never think about or ever see and yet without it, it just wouldn't be finished, amazing!!
Mouse
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Post by dusty350 on Aug 21, 2022 19:18:46 GMT 1
Awesome work as always mate - and a massive amount of patience!! Dusty
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Post by yamark on Aug 24, 2022 21:03:51 GMT 1
Another great bit of work Mark. Good idea putting them in a little bag. I would leave them on a shelf and lose one I had a quick action throttle on my TS100 the origins of which were un-known. It snapped on me a couple of times and I had no idea where to get a cable from so I used to make a barrel nipple out of a piece of nail, cut, drill and solder the cable in. That lath is a very useful if not essential bit of kit for this project . Steve, I've learnt over the years to bag everything, and I'm a slow learner. In fact if you're suppose to learn by your mistakes, I should be a genius Cheers for your kind words
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RD700LC
Aug 24, 2022 21:11:53 GMT 1
Post by yamark on Aug 24, 2022 21:11:53 GMT 1
Hi Mark, a bit waste/time consuming on the OD of those nipples, but I know what it’s like to only have certain stock left. The drill bit for the chamfer looks the standard 120 degree? I’ve got a tool I use for that sort of thing that cuts at a much sharper angle. You should be ok if you leave a rounded blob of solder on the end. I love all these special little fabrications that most people wouldn’t be able to do themselves, or realise there necessary and bodge it accordingly. Can you not heat the standard LC elbows no bend further? Hopefully they wouldn’t collapse? Maybe a stripped of plastic outer cable could be inserted before the bending? Reduced in diameter if need be? Jon Hi Jon, that's the max diameter that will go round the bend and fit in the carb slide. Years ago, I used to repair cables for my mates when we were strapped for cash. I'm confident on the splaying and soldering of the end- I do loads of soldering at work I've decided to make new bends Cheers mate for your comments, Mark
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Post by yamark on Aug 24, 2022 21:17:21 GMT 1
Hi Mark I'm sure you could make the bends yourself. The die needed for the thread is also not too expensive. You can also get teflon tubing which is used in 3D printers to line the inside of the bend for a silky action. Thanks Tobyjugs, I'm making new bends, I have metric fine thread taps and dies and can use the original cable sleeves fitted to the bends. Cheers for your thoughts mate, I always appreciate everyone's input
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Post by steve63 on Aug 24, 2022 21:42:50 GMT 1
Would you be silver soldering the nipples or soft solder Mark?
A while back I was thinking of buying one of those little gas bottle kits sold as welding and brazing kits. I have a TIG welder but I though it might be handy to have the means to do silver soldering and brazing. I don't think a normal plumbers torch goes hot enough for silver and certainly not hot enough for brazing.
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Post by sidney81 on Aug 28, 2022 8:32:21 GMT 1
Hi Mark just caught up with this , fantastic detailed work 🙂
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Dave B
Drag-strip hero
Posts: 240
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Post by Dave B on Aug 28, 2022 10:15:03 GMT 1
A MAP gas torch will get things hot enough for silver solder and even brazing if the item you are working on is either small, or resting on a firebrick to reflect the heat back to the job. I use two just on the bench top. One lies flat, and the other is on edge at the back. I brazed up a 10mm steel rod with a MAP gas torch that way.
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RD700LC
Aug 28, 2022 18:29:13 GMT 1
Post by yamark on Aug 28, 2022 18:29:13 GMT 1
Would you be silver soldering the nipples or soft solder Mark? A while back I was thinking of buying one of those little gas bottle kits sold as welding and brazing kits. I have a TIG welder but I though it might be handy to have the means to do silver soldering and brazing. I don't think a normal plumbers torch goes hot enough for silver and certainly not hot enough for brazing. Hi Steve, Dave B answered your question perfectly. I use Mapp gas (hotter than propane) for silver soldering. It's the yellow disposable bottles that screw directly into a plumbers torch. Cheers, Mark
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Post by yamark on Aug 28, 2022 19:04:29 GMT 1
Before I can finish the carb cables, I need to install inline check valves on the oil lines. Rather than have the check valves resting on top of the crankcase, I thought I'd make a bracket to secure the 4 check valves. So I made a bracket after templating in cardboard SDC12257 I then simply pop riveted the 2 parts together SDC12258Next, I used a inlet rubber fixing to bolt the bracket in position SDC12259I can now install the carbs for cylinders 3 and 4 to measure the carb cable length. At the same time, I had access to the clutch cable, so I had to fit 3 guide brackets, 2 of which I had to make. This is the bracket to hold the clutch cable next the headlight, so the clutch cable isn't pinched by the steering lock stops. The lower guide is fitted to the far right inlet rubber, and the middle guide will be fitted to the right upper radiator mount. SDC12260 And lastly, my radiator made by GMX has a spigot diameter smaller than the expansion tank, so I made an inline reducer SDC12261 Now, one surprise came up in the week, I found out that Norbo isn't going to have a stand at the Stafford show in October. (The show organisers didn't contact Norbo, and by the time this was realised, the larger pitches have been allocated) So, I've entered the 700LC as a private entry, but don't know if I've been accepted yet. Lets hope I get in or the bike won't be at the Stafford show Cheers, Mark
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Post by donkeychomp on Aug 28, 2022 21:42:14 GMT 1
Oooh good luck Mark!
Alex
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Post by JonW on Aug 29, 2022 0:59:57 GMT 1
Great updates Mark!
The brackets look great solutions and reminded me of Project Binky, that was 5+ years of brackets lol 'Time to get the funk out...'
Good luck (not that you need it!) with the show!
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Post by dusty350 on Aug 29, 2022 20:08:19 GMT 1
I've seen all these little brackets recently, and they look "factory" Such fantastic attention to detail Hopefully you'll get it to Stafford, where it could seriously win "best in show" It deserves to. Dusty
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Post by donkeychomp on Aug 29, 2022 21:20:17 GMT 1
Project Binky...I recall that and I gave up after episode 7. It got mind numbing. Fix that part then rip it all out and start again. Did they ever finish it?
Alex
ps would have been easier and a LOT cheaper to buy a Z car...
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Post by Robbieben on Aug 30, 2022 13:16:42 GMT 1
Lovely work Mark, following this project gives so much pleasure in reading through it all and admiration of your work.
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Post by yamark on Sept 4, 2022 16:36:17 GMT 1
Thanks Alex, Jonw, Dusty and Robbieben. Just to tidy up last week, I can't fit the middle clutch cable bracket until the radiator is fitted, but that is soon. Back to the carbs, I need to make 2 bespoke "LC type" carb cable bends for cylinders 1 and 4 I have a plan. So I'm using stainless steel tube. First, I have to reduce the diameter of the tube, ready for threading first, then I will bend the pipe at an angle of 85 degrees. Reduced SDC12262 Then bent on a mini pipe bender(I do this first so I don't damage the thread I must cut) SDC12263 To give this result SDC12264 Next up, I thread the cable guide url=https://flic.kr/p/2nJscrD]SDC12265[/url] Then, I duplicate url=https://flic.kr/p/2nJyBYp]SDC12266[/url] So, I now have to make a pair of brass fanges, to fit the carb tops, and I can silver solder everything together It's getting really close to being finished Cheers, Mark
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