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RD700LC
Oct 13, 2020 17:26:53 GMT 1
Post by yamark on Oct 13, 2020 17:26:53 GMT 1
Cheers, Steeley, Dusty, Sidney81
arrdy350 - the paintwork was finished around 2 years ago . All I'll say is it's not standard.
Bezzer - I like the look of the R6 forks, standard looking but bigger. Cheers mate.
CBM - no need for blame at all mate, and a pleasure to help. Cheers and see you soon
Denzil - Really kind mate, and yes it will be videoed
Steve63 - Go on, go for it, you only need 2 sets of cases and a pair of cylinders , but the triple was harder to build than the four.
Thank you all for your kind words
Cheers, Mark
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Post by arrdy350 on Oct 13, 2020 17:52:15 GMT 1
Cheers, Steeley, Dusty, Sidney81
arrdy350 - the paintwork was finished around 2 years ago . All I'll say is it's not standard.
Bezzer - I like the look of the R6 forks, standard looking but bigger. Cheers mate.
CBM - no need for blame at all mate, and a pleasure to help. Cheers and see you soon
Denzil - Really kind mate, and yes it will be videoed
Steve63 - Go on, go for it, you only need 2 sets of cases and a pair of cylinders , but the triple was harder to build than the four.
Thank you all for your kind words
Cheers, Mark 2 years ago 😮 Can't wait to see what colour scheme you have designed 😀 Also big fan of your triple it was excellent when I saw at MCN show 😀
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Post by rostrumorhospital on Oct 13, 2020 18:39:41 GMT 1
The one word that comes to mind is Quality, the fact that you enjoy a challenge shows in every part of the build, no short cuts anywhere, can't wait to hear it running. ATB Davey
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Post by yamark on Oct 18, 2020 21:01:43 GMT 1
Thanks, arrdy350, and Rostrumorhospital
I took a photo of the exhausts once I removed them from the bike, I think they are a work of art.
SDC11921
As well as making the exhausts from scratch, Mick Abbey also matched and tuned the 4 cylinders. We agreed to have the power, lower in the rev range (by about 500 RPM), and for strong midrange and peak power. It's a little hard to describe the triple's power, but imagine a standard LC and double the rush of the midrange (2,500 RPM onwards), then similar to an RD500 from 5,000 revs onwards.
Here's the cylinders
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And a close up of the base of the transfer ports
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It's going to be a monster
Cheers, Mark
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Post by donkeychomp on Oct 18, 2020 21:52:00 GMT 1
Makes me wonder why Mr Yamaha san never made this himself. Just glad you're doing it instead Mark.
Alex
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Post by spacejunkie on Oct 18, 2020 22:11:31 GMT 1
Wow
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Post by dusty350 on Oct 19, 2020 6:56:48 GMT 1
Looking good mate He's done a lovely job, again. Well worth the trip "oop north" ! Dusty
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Post by Yogi on Oct 19, 2020 8:05:46 GMT 1
Slowly slowly getting there mate, the pipes are indeed a work of art 👌
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Post by mellow on Oct 19, 2020 16:28:04 GMT 1
amazing. I just sit and look at your work thinking wow!!! If you want me to look after it and ride it for you when complete i don't mind
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Post by 4l04ever on Oct 19, 2020 18:51:51 GMT 1
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Post by purpletoddy1981 on Oct 20, 2020 14:01:46 GMT 1
never fails to amaze me the engineering that goes on in some sheds, what a build all be it crazy but in a good way.
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Post by yamark on Oct 25, 2020 19:38:50 GMT 1
Cheers Alex, I think Yamaha knew emissions were going to kill off 2 strokes. Thanks, Spacejunkie, Dusty, Yogi and Purpletoddy1981
Mellow, thanks for the offer , one of the reasons I build big capacity LC's is to experience that rush, as they hit the "wiz band". I'm very privileged to be one of the very few to have ridden such exotic machinery.
4LO4ever- Rob, cheers for posting such an amazing article, I never knew this bike existed, just brilliant.
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Post by yamark on Oct 25, 2020 20:27:06 GMT 1
One of the hardest parts of the build is to extend the gearbox output shaft. There are a couple of options, 1. Join 2 gearbox shafts 2. Have a new, longer shaft made
I prefer the second option. I measured the chain run and worked out the new length of shaft. For the triple build, I used Ellis Moore for the gearbox shaft. Ellis was a delight to deal with. He made a gearbox shaft to the exact specification, on time and at a very reasonable cost. I found out early this year, that Ellis had a very serious accident, a life changing motorcycle crash. I wish him and all around him the very best. I have spoke to him a couple of times- he is an inspiration, I keep him updated on the build.
I haven't found anyone as skilled out there, with the experience of Ellis, however, I used a local engineering firm to make a new shaft to the new spec needed for the 700LC
A drawing was supplied, as well as a standard shaft, sprocket and a couple of gears. This was a week before lockdown! Now, for those that don't know (me included before the triple build), the gearbox shafts are hardened. So they are machined, hardened, then ground back to the required diameter. They are machined larger as the hardening process changes their size very slightly.
So here's the new, extended gearbox shaft and a standard LC shaft
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SDC11958
This still has to be hardened and ground back to size. I had 2 shafts made as there is another 4 cylinder "in production" from another Forum member . It's his news to tell.
Lastly, a change in my workshop- a "new" Myford ML7 1957 lathe .
I spent a bit of time renewing parts and making bushes, and a new section of workbench
SDC11950
I hope to be stepping up production
Cheers, Mark
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Post by dusty350 on Oct 25, 2020 20:48:45 GMT 1
Hi mate Wow, that lathe has come up nicely Looks new !! And they've done a great job of the output shaft. Another part of the jigsaw done Hope you and the crew are well Dusty
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Post by cb250g5 on Oct 25, 2020 21:04:17 GMT 1
Another Myford owner. Nothing you can't make at home now.
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Post by sidney81 on Oct 25, 2020 21:45:08 GMT 1
Hi mark lovley myford ,I'm on the lookout for a nice little lathe ,I'd like a boxford !!they hold there money ,as do myfords because there so good ,I'll see try save some extra money up,I also have the use of 3 lathe's at work but would still love my own 😊Chris
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Post by pedheadfred on Oct 25, 2020 23:11:37 GMT 1
One of the hardest parts of the build is to extend the gearbox output shaft. There are a couple of options, 1. Join 2 gearbox shafts 2. Have a new, longer shaft made
I prefer the second option. I measured the chain run and worked out the new length of shaft. For the triple build, I used Ellis Moore for the gearbox shaft. Ellis was a delight to deal with. He made a gearbox shaft to the exact specification, on time and at a very reasonable cost. I found out early this year, that Ellis had a very serious accident, a life changing motorcycle crash. I wish him and all around him the very best. I have spoke to him a couple of times- he is an inspiration, I keep him updated on the build.
I haven't found anyone as skilled out there, with the experience of Ellis, however, I used a local engineering firm to make a new shaft to the new spec needed for the 700LC
A drawing was supplied, as well as a standard shaft, sprocket and a couple of gears. This was a week before lockdown! Now, for those that don't know (me included before the triple build), the gearbox shafts are hardened. So they are machined, hardened, then ground back to the required diameter. They are machined larger as the hardening process changes their size very slightly.
So here's the new, extended gearbox shaft and a standard LC shaft
SDC11959
SDC11958
This still has to be hardened and ground back to size. I had 2 shafts made as there is another 4 cylinder "in production" from another Forum member . It's his news to tell.
Lastly, a change in my workshop- a "new" Myford ML7 1957 lathe .
I spent a bit of time renewing parts and making bushes, and a new section of workbench
SDC11950
I hope to be stepping up production
Cheers, Mark
MyFord are an excellent piece of kit a chap used to live near me sold parts for them and sold lathes aswell Last time I see him was at Stafford show last year when he had his stall in the main hall, but you can apparently still buy new parts .
Myford.co.uk
01422 885766
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Post by spacejunkie on Oct 26, 2020 20:19:48 GMT 1
Cheers Flames, and everyone following.
I had some time to clean up both engine covers and work on my wiring loom.
This is the modded clutch cover, that will now clear a lock up clutch. To remind you, the 3 standard star disc lugs have been removed, and a generator cover disc cut and welded in place
SDC11948
The generator cover weld cleaned up, for the second pick up housing
SDC11949
I also finished restoring the standard LC loom. I removed all the terminals out of the blocks, soaked the terminals in white wine vinegar and salt, neutralised them in bicarb of soda and re assembled
Terminal removed
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Cleaned
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The upper 3 done- very mind numbing, but worth it
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Lastly, I repaired all the bullet connectors, and replaced any damaged block connectors
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SDC11923
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Cheers, Mark
I am doing this at the moment on an old loom Good god it’s tedious
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Deleted
Deleted Member
Posts: 0
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Post by Deleted on Oct 27, 2020 8:15:19 GMT 1
Good job, all above my pay grade . Most peoples actually. Thanks for sharing the journey.
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RD700LC
Oct 28, 2020 22:23:05 GMT 1
via mobile
Post by steve63 on Oct 28, 2020 22:23:05 GMT 1
Cheers, Steeley, Dusty, Sidney81
arrdy350 - the paintwork was finished around 2 years ago . All I'll say is it's not standard.
Bezzer - I like the look of the R6 forks, standard looking but bigger. Cheers mate.
CBM - no need for blame at all mate, and a pleasure to help. Cheers and see you soon
Denzil - Really kind mate, and yes it will be videoed
Steve63 - Go on, go for it, you only need 2 sets of cases and a pair of cylinders , but the triple was harder to build than the four.
Thank you all for your kind words
Cheers, Mark I have the middle cylinder and head I did. But for now at least I think I'll just try to concentrate on getting a standard LC back on the road. I think that'll be taxing enough for me. I may look at it again in the future maybe.
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2taol
Thrash Merchant
Posts: 378
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Post by 2taol on Oct 29, 2020 8:26:48 GMT 1
very interesting updates! such a great thread.
thats it, i dont have any other input 👍
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Post by yamark on Oct 29, 2020 20:56:43 GMT 1
Cheers Dusty, we're all good thanks cb250g5 - I wanted a slightly bigger lathe than the Clarke CL300 I had Sydney 81 - I'm jealous, 3 lathes to use at work. The Myford is perfect for my needs. Pedheadfred - you are right, so many spares available, and thanks for the contact number Spacejunkie - boring, but well worth it, takes me 1 to 2 hours to refresh a loom Ken007 & 2taol - glad your both enjoying the build Steve63 - PM me, if ever you need any help to scratch that itch, to build a 3 cylinder LC
Cheers all, Mark
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Post by yamark on Nov 1, 2020 21:09:39 GMT 1
Next up, I had to make my headlight brackets, so did a bit of CAD, to get the shape I wanted
SDC11951
After cutting out the shape in 5mm ali, I drilled and bolted the 2 brackets together
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SDC11955
I also cleaned up my cylinders
SDC11962
Cheers, Mark
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Post by yamark on Nov 8, 2020 21:47:08 GMT 1
A busy week for me at work, so not much time spent working on the bike.
Continuing with the headlight brackets
Next, I drilled through and Dremel the internal shapes
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I then drilled the indicator mount hole
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Followed by the indicator peg hole that locates the base of the indicator
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I have to finish the internal shapes, then clean up the brackets.
Cheers, Mark
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Post by sidney81 on Nov 9, 2020 10:25:30 GMT 1
Lovley work mark look like they have been CNC Laser cut 🙂, brilliant 👍
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Post by yamark on Nov 15, 2020 21:55:39 GMT 1
Some of you might remember, that one of the problems I had with the triple LC was a leak on the centre cylinder. The problem was the where a plate was welded to seal the cylinder after it had been milled. As I have two cylinders that have been milled on the 700, I thought it would be wise to pressure test both to check for leaks.
10mm ali block was drilled and counter bored for the Schrader valve to be fitted. Also holes for the bolts to clamp the plate to the cylinder
SDC11968
SDC11969
I'll use 1mm thick rubber sheet to act as the head gasket
SDC11971
And assembled, ready for pressure testing
SDC11972
I should get to test both cylinders in the week
Cheers, Mark
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RD700LC
Nov 15, 2020 23:16:44 GMT 1
Post by Tobyjugs on Nov 15, 2020 23:16:44 GMT 1
Hi Mark are you still going to use a standard water pump?
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RD700LC
Nov 16, 2020 17:24:35 GMT 1
Post by yamark on Nov 16, 2020 17:24:35 GMT 1
Hi Mark are you still going to use a standard water pump? Hi Tobyjugs, there have been no cooling issues as far as I'm aware from previous LC fours. However, I did look at the water pump housing, and there are a couple of restrictions. My thinking was to enlarge the passageways and use a standard impeller. I can always change the impeller if the temp gauge goes to high- that's a rare thing on an LC! What do you think?
Cheers, Mark
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Post by Tobyjugs on Nov 16, 2020 18:16:18 GMT 1
Your right the restrictions are in the water pump housing. I have opened up the pressure side of the pump housing, but the gains are limited. This is easier to do on a YPVS housing than a 4LO. In making the pressure side of the pump bigger I've penetrated the cover itself. This was obvious so I welded up that area before the dremel came. Because of the built up weld an original cover oil pump will not anymore. Not a problem for my build. I also have a different set of water pump gears to spin the pump faster, but not sure about that option.
I also think the design of the hi flow impeller I have is pants and could easily be improved.
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RD700LC
Nov 16, 2020 20:43:53 GMT 1
Post by yamark on Nov 16, 2020 20:43:53 GMT 1
Increase the water passageways it is then. I know I have to be careful with water pump housing, as my clutch cover is already modified for the RG500 oil pump. I would hate to do all that work again.
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