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Post by jon on Oct 28, 2022 7:49:02 GMT 1
I’m surprised 4l04ever hasn’t commented on this thread. His LC for sale has a single disk and 4 pot. Jon
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Post by 4l04ever on Oct 28, 2022 9:04:10 GMT 1
I’m surprised 4l04ever hasn’t commented on this thread. His LC for sale has a single disk and 4 pot. Jon Just spotted this.... I use a single 320mm TDR250/FZR1000 front disk on the right on my 2 LCs. Using a Blue spot R6 style caliper with an NK Racing billet adapter. I found you need an 11mm master cylinder to get good feel, so use a YBR125 one as it has the same brake light switch and mirror mounts as 250 and 350 LC ones. I use 31K forks with a Micron fork brace. Both bikes brake a lot better than a twin 350LC disk setup.
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Post by 4l04ever on Oct 28, 2022 9:09:17 GMT 1
Also, my mate just fitted two 300mm disks on his hybrid with Triumph calipers and said my single disk was more than enough and wished he had gone for that instead.
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Post by LC_BOTT on Oct 28, 2022 9:15:21 GMT 1
Bought my 350 LC with a single disc conversion already fitted. From a TZR250 I'm guessing, similar to 4LOs above, needs a nicely machined spacer to fit the wheel profile as the disc is flat. Also has the 'wonky' TZR M/C fitted, (originally on clipons) so needs sorting properly to be fair.
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Post by steve63 on Oct 28, 2022 9:46:17 GMT 1
That's odd because I just had a look for it and I can't find it either. I had a Lockheed caliper, the TZ disc with mounting centre which I explained was the same as an early air cooled RD250/350 and a home made stainless bracket for mounting the caliper to the LC leg. Someone, had the caliper and bracket but the disc never went. I don't remember deleting the thread. Maybe one of the admins did? Anyway, I've been in the garage and took a photo. The disc is 296mm compared to an LC's 264mm, so plus 32mm. Ahh mystery solved as to why I thought it was Dusty, it was him who did the purchasing... weird its been deleted tho Is the big disk vented? Im wondering why its got vanes. interesting. No the disk is flat. The centre is the same as some older RD. I worked with a guy who raced a Maxton TZ. He said the TZ guys would buy the RD ones purely because they were cheaper. I'm guessing the vanes are a bit like the Ram Air heads on GT250's etc, look like they direct air and help cooling but are only cosmetic in reality. I suppose an aluminium centre would be a bit of a heat sink so would help.
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Post by JonW on Oct 28, 2022 12:49:42 GMT 1
So much great info in the thread, Im really glad I asked.
Thanks to all who have contributed!
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Post by midlifecrisisrd on Oct 28, 2022 12:55:50 GMT 1
All the "colour" spots are the same size
Piston material does vary but can't remember exactly
Strangely I've never found a rusty piston
Think the blue ones are the usual plated steel
Steve
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Post by JonW on Oct 28, 2022 12:56:04 GMT 1
Didnt want my question to be lost at the bottom of the other page.... so, reproduced here: Are all these 'colour' spots the same dimensions/specs? (silver spot as an example) Do any of them come with any better innards, like stainless pistons? and, also... Is there a bracket available that adapts blue / silver / gold spots to the fit the 300-ish mm disks?
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Post by JonW on Oct 28, 2022 12:57:48 GMT 1
All the "colour" spots are the same size Piston material does vary but can't remember exactly Strangely I've never found a rusty piston Think the blue ones are the usual plated steel Steve Ahh we posted together! haha. Thanks for the info Steve. Its very tempting to use a modern caliper considering the cost and the quality of old LC and early YPVS units now. hmm... So we think the later gold and silver spots might well have better piston material? Could it be as simple as Gold is better than silver???
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Post by midlifecrisisrd on Oct 28, 2022 12:58:21 GMT 1
Are silver stainless and gold alloy?
NK will do a bracket no doubt
Steve
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Post by abar121 on Oct 28, 2022 15:57:57 GMT 1
Yet another excellent thread! I've been pondering which way to go with my 370cc conversion. I was going to try just a 4 pot caliper on the single stock LC disk, but will look at other options. I'm sure with the right M/C, it would be an improvement on the stock twins. The single caliper on the TZR250 1KT/2MA and TDR work brilliantly. Steve63, I had a single then upgraded to a twin setup on my H2B 750, initially using the stock M/C. It was shite until I upgraded to the twin disk M/C. Even then, about as lacking as the rest of the chassis setup
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Post by tony2stroke on Oct 28, 2022 17:28:56 GMT 1
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Post by stusco on Oct 28, 2022 17:33:55 GMT 1
Are silver stainless and gold alloy? NK will do a bracket no doubt Steve I have gold spots I believe they are alloy pistons
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Post by Tobyjugs on Oct 28, 2022 18:31:27 GMT 1
Love the colour of the pipes. It’s your fault they look like that. Ages ago you posted a pic of your pipes and that you wiped them down with oil. I thought they looked gorgeous. I just wire wooled the black off and wipe them down with wd40 or oil and they’ve gone that colour 👍🏻 They will look even better if you cover them in two stoke oil. Plus it seems to protect better. I tried WD40 and old engine oil but it's no so protective as 2T oil. I'm flattered I managed to impress someone. Bare steel pipes are a Labour of love and I have to admit when winter hits in Holland the stainless steel JL's are fitted as you lose all the patina from the layers of oil built up once the roads are salted and you need to clean them to remove rust spots. There was another member who clear coated his pipes. When he used it the went a gorgeous brown. If I remember correctly he did not like that ad he wanted them to stay as made.
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Post by Tobyjugs on Oct 28, 2022 18:49:41 GMT 1
For my Bakker bike I ordered TWO made to measure discs and it was 400+ euros. It was expensive, everything fitted properly and they are good.
I'm not a skillfull rider but with that set up I need a seat belt and I can regulate the braking enouth that the back wheel is skipping over the tarmac. Something I can't do on my LC with the R6 set-up. That just feels like my eyeballs are going to pop out when I touch the brake lever.
It could be an option to consider this you might be able to save money on adapters and special calipers if it's only one disc.
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Post by steve63 on Oct 28, 2022 20:01:53 GMT 1
Yet another excellent thread! I've been pondering which way to go with my 370cc conversion. I was going to try just a 4 pot caliper on the single stock LC disk, but will look at other options. I'm sure with the right M/C, it would be an improvement on the stock twins. The single caliper on the TZR250 1KT/2MA and TDR work brilliantly. Steve63, I had a single then upgraded to a twin setup on my H2B 750, initially using the stock M/C. It was shite until I upgraded to the twin disk M/C. Even then, about as lacking as the rest of the chassis setup After my KH500 I bought a brand new 350LC and I thought the brakes were amazing. I bought a second hand 250 maybe 2 years later and put my old 350 top end on it and the single disc caused a few arse nipping moments. Not even adequate I would describe it as. The RGV VJ21 with braided lines is about perfect but I describe riding it as like riding a push bike with an engine in it because it feels so light. I might just keep the big disc and try different calipers/mc's on it myself.
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Post by JonW on Oct 28, 2022 23:28:15 GMT 1
Ahh we posted together! haha. Thanks for the info Steve. Its very tempting to use a modern caliper considering the cost and the quality of old LC and early YPVS units now. hmm... So we think the later gold and silver spots might well have better piston material? Could it be as simple as Gold is better than silver??? rdlccrazy.proboards.com/thread/49684/yamaha-blue-spot-calipersSuper link Tony, Thanks so much! salient info: Gold have aluminium pistons. Blue have steel - they do rust. Silver spots are reputed to have stainless pistons, but I have found ordinary pitted steel ones in one I stripped. Unless radial mount, they are all 100mm between centres and interchangeable (bleed nipple and banjo placements differ between models). Easy to strip and rebuild.
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Post by abar121 on Oct 29, 2022 14:51:09 GMT 1
Yet another excellent thread! I've been pondering which way to go with my 370cc conversion. I was going to try just a 4 pot caliper on the single stock LC disk, but will look at other options. I'm sure with the right M/C, it would be an improvement on the stock twins. The single caliper on the TZR250 1KT/2MA and TDR work brilliantly. Steve63, I had a single then upgraded to a twin setup on my H2B 750, initially using the stock M/C. It was shite until I upgraded to the twin disk M/C. Even then, about as lacking as the rest of the chassis setup After my KH500 I bought a brand new 350LC and I thought the brakes were amazing. I bought a second hand 250 maybe 2 years later and put my old 350 top end on it and the single disc caused a few arse nipping moments. Not even adequate I would describe it as. The RGV VJ21 with braided lines is about perfect but I describe riding it as like riding a push bike with an engine in it because it feels so light. I might just keep the big disc and try different calipers/mc's on it myself. I had a VJ22 for daily transport for many years. Although the brakes were decent, I did get that inconsistent travel issue that many report. It was like that from new and still after braided lines were fitted. Lovely bike though and could fit though gaps that thwarted London couriers. I think I'll try a stock single disk with a Gold spot on my 370, as I already have one.
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Post by steve63 on Oct 30, 2022 10:09:11 GMT 1
After my KH500 I bought a brand new 350LC and I thought the brakes were amazing. I bought a second hand 250 maybe 2 years later and put my old 350 top end on it and the single disc caused a few arse nipping moments. Not even adequate I would describe it as. The RGV VJ21 with braided lines is about perfect but I describe riding it as like riding a push bike with an engine in it because it feels so light. I might just keep the big disc and try different calipers/mc's on it myself. I had a VJ22 for daily transport for many years. Although the brakes were decent, I did get that inconsistent travel issue that many report. It was like that from new and still after braided lines were fitted. Lovely bike though and could fit though gaps that thwarted London couriers. I think I'll try a stock single disk with a Gold spot on my 370, as I already have one. Not a bad idea to try what you already have 'in stock' before going out and buying stuff. I might do the same. I have a couple of sets of RGV front calipers and a master cylinder. One of the sets, I've not looked closely at the latest ones I bought, is a slightly later design but still off an RGV. Maybe it's VJ21 v Vj22 but anyway they have a bit more 'meat' on them. Maybe Suzukis attempt, or rather the caliper manufacturers, attempt to reduce flex of the caliper body? They look identical until you look closely. In theory they should be better than the ones I have on the RGV now but I'm reluctant and too lazy to try them. I wouldn't know if they were better unless I went on a track anyway. Cold logic would say the only way the lever would have inconsistent travel would be if the fluid was slipping past a seal. maybe the master cylinder and going back towards the reservoir? Anything else you would lose fluid. That RGV of mine manages roughly 105mph at Cadwell down Park straight and getting past people on the brakes into Park Corner is pretty much one of the only places I can do it. If the brake was inconsistent just by a fraction I would be on the grass and heading for the tyres . I have been close to that a few times but that was just me pushing the limit . One guy had a master cylinder from a well known far eastern country on his RGV. He was heading out for a session with me and suddenly his lever was coming straight to the grip with no resistance whatsoever! That's one of my sayings now "don't use Chinese $hit for a safety critical item."
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Post by bare on Nov 5, 2022 21:02:10 GMT 1
Ummmm.. ? Well beyond the fitting of More capable brakes to an LC: Best replace the LC forks then.... cuz at a whopping 32mm diameter, these where the thinnest, flimsiest Forks that Yama Ever fitted to an RD. Can give one religion to watch one's LC forks bend under the massive braking power of 40 yr old clapped out LC brakes. Bobbles the mind as to the carry on effects of decent braking power. Prudent to be clever here.
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