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Post by philip on Nov 30, 2019 6:11:18 GMT 1
I have a set of forks, triple clamps, brakes, clip ons off a YPVS these forks as you know are 35mm against the LC which are 32mm.
Has any one done this conversion and is it worth while?
Thanks
Philip
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Post by dusty350 on Nov 30, 2019 7:23:11 GMT 1
Yea, I did it on my 400 back in the 80's. Stiffened the front end up a bit, and depending which model Pv, you may have better brakes too. You say clip ons - if they are F2 forks and clip ons then they are longer than Lc forks - the clip ons mount on top of the yokes - and that's not so good as Lc2 forks and yokes mimic the Lc set up better (clock mounts, handlebars/cable runs etc) Dusty
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Post by reedpete on Nov 30, 2019 9:13:46 GMT 1
YPVS front end does help a bit but the original LC was/is a bit like that original Access credit...your flexible friend ! Forks, headstock to frame arrangement and swingarm all added to ‘the LC experience ‘ ! Just addressing stability in one shoves the flexion harder into the rear part of the frame. Lower ball races got a lot to do with what’s going up front. Tapered lower and ball upper races seems to give best hassle free improvement.
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Post by earthman on Nov 30, 2019 10:30:03 GMT 1
Back in the day I never even thought of such mods, just got on and rode it. Lol It is amazing how things have moved on, modern bike frames etc are streets ahead.
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Post by veg on Nov 30, 2019 11:53:39 GMT 1
Philip, my bike has 35mm pv 31k forks fitted into same yokes. The 31k are waisted at the top so you can still use the original head lamp brackets from the lc if you wish. One thing i would say with any bike from this era/age is fully rebuild the forks new seals, bushes etc, check stanchions aren't pitted and are true, new fork springs, roller head bearings etc just fitting probably won't make much difference if they aren't also refreshed. Brakes do you mean calipers?
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Post by reedpete on Nov 30, 2019 12:46:21 GMT 1
Back in the day I never even thought of such mods, just got on and rode it. Lol It is amazing how things have moved on, modern bike frames etc are streets ahead. We had an inverted mindset then. These bikes were so desirable because they were to be feared and then mastered ! Not the brutal power of an H2, but still required respect. Funnily enough though, I think it was in part due to the 250 being accessible to a learner on an L plate, with the predictable consequences, that then set the 350 up as some type of deity to be worshipped!
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Post by 1966baz on Nov 30, 2019 14:46:12 GMT 1
I have done it on a LC. I does stiffen up the handling a bit.
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Post by 1966baz on Nov 30, 2019 14:49:12 GMT 1
I have now got a 3vx front end.It intend to put the front end in a blue lc.
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Post by 1966baz on Nov 30, 2019 15:13:24 GMT 1
This is the blue one.
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Post by donkeychomp on Nov 30, 2019 23:40:43 GMT 1
I can't see the point on doing it to an LC to be honest. I've done it on a A/C RD250 and it looked great and you have twice the stopping power you used to have. But if you are doing a fork swap surely USD is the only way to go? Replacing forks with ones slightly bigger seems a lot of work for little gain...or am I missing something? (usually am...)
Alex
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Post by hoist1 on Dec 1, 2019 0:22:52 GMT 1
What’s wrong with Rwu forks ?
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Post by veg on Dec 1, 2019 0:52:18 GMT 1
Alex you are of the plebiscite 😁. I do agree for me it was a normal upgrade ala the time frame.
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Post by JonW on Dec 1, 2019 9:37:15 GMT 1
I agree with Alex and Veg. Back in the day people did this as it was easy and it was an actual upgrade, now tho those are weedy forks and offer little compared to modern forks if done right so you never really see anyone do it now.
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Post by hoist1 on Dec 1, 2019 9:59:57 GMT 1
What’s wrong with Rwu forks ? Didn’t the R6 have rwu forks until recent years? Mind you they are one of the worst handling bikes ever. How good does handling have to be on anything, then not even use that minute difference.
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Post by Tobyjugs on Dec 1, 2019 10:24:01 GMT 1
What’s wrong with Rwu forks ? Didn’t the R6 have rwu forks until recent years? Mind you they are one of the worst handling bikes ever. How good does handling have to be on anything, then not even use that minute difference. I have RWU R6 forks in my 4LO. I do think they look a little thick but they are comfortable and more than good enough for my riding skills. These are now being bought up by the flat trackers.
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Post by hoist1 on Dec 1, 2019 10:41:39 GMT 1
Didn’t the R6 have rwu forks until recent years? Mind you they are one of the worst handling bikes ever. How good does handling have to be on anything, then not even use that minute difference. I have RWU R6 forks in my 4LO. I do think they look a little thick but they are comfortable and more than good enough for my riding skills. These are now being bought up by the flat trackers. This sounds good to me and it would be the direction I would go in, also on a positive note , if upside downers do work that well then the frame must be pretty good . I know this isn’t racing but when a certain Casey stoner was doing the business, that was on the supposedly inferior steel tube frame iirc. Shame funny front ends aren’t exactly thick on the ground, I did have a soft spot for the gts 1000 , Steve Lindsell made a good fist of his TT racer, shame the doner bike is so heavy. Would like to see one of these front ends on a special, they are used on a few scooters so not impossible, just need a bit of beefing up.
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Post by veg on Dec 1, 2019 12:49:01 GMT 1
Big fan of funny front ends bike suspension hasn’t really changed in nearly 100 yrs primarily because we tend to be very pessimistic and traditional in our out look , big fan of people like tony foale ( my mechanical anti dive is based on his design) loved the tesi, gts 1000, elf etc The benefits of usd forks for me are wasted on an lc esp 4lo the biggest restriction is the frame design and all its inherent weakness that’s why I like jon’s build where he has braced the frame
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Post by earthman on Dec 1, 2019 17:00:25 GMT 1
From a practical point of view, when a seal goes on an upside down fork, all the oil is going to exit pretty quickly and possibly over the brakes too!
I understand why almost every modern bike has them but I'd prefer to have 'normal' forks on my daily ride at least.
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Post by hoist1 on Dec 1, 2019 17:20:40 GMT 1
Big fan of funny front ends bike suspension hasn’t really changed in nearly 100 yrs primarily because we tend to be very pessimistic and traditional in our out look , big fan of people like tony foale ( my mechanical anti dive is based on his design) loved the tesi, gts 1000, elf etc The benefits of usd forks for me are wasted on an lc esp 4lo the biggest restriction is the frame design and all its inherent weakness that’s why I like jon’s build where he has braced the frame A gts 1000 on a huge weight saving exercise would be good and might not then need to de restrict the engine. Had an abs one for a long weekend and though it was hard work on the really twisty roads ( had a very large passenger )it was so stable under heavy braking.
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Post by Tobyjugs on Dec 1, 2019 20:26:33 GMT 1
I've always liked the omega frame from Yamaha. There was a time when they were as cheap as chips. I wanted to do something with one of those bike but I was too late. They are expensive now.
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Post by Tobyjugs on Dec 1, 2019 20:32:15 GMT 1
Another thing I keep thinking about is everyone keeps saying how bendy our frames are? They now engineer flex into a chassis.
Does everyone think our bikes are so bad?
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Post by nobby62 on Dec 1, 2019 21:34:33 GMT 1
I guess its each to his own when it comes to upgrades.. but there is nothing wrong with a good pair of conventional forks on a lightweight bike.... some of the finest handling strokers have rwu forks... NSR250 for example
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Post by veg on Dec 1, 2019 22:16:58 GMT 1
Another thing I keep thinking about is everyone keeps saying how bendy our frames are? They now engineer flex into a chassis. Does everyone think our bikes are so bad? They are of their time ahead of the equivalent 4 strokes and personally I love the lightweight flex’s nature if I wanted a decent handling bike I certainly wouldn’t start with an lc. I no longer want a 120plus bhp radial braked usd alloy frame monster completely pointless on today’s roads and I don’t giggle when riding them like I do the lc.
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Post by earthman on Dec 1, 2019 23:04:10 GMT 1
Does everyone think our bikes are so bad? Only when I compare them to a modern bike. Back in the day I rode an LC a lot harder than I do now, I'm amazed that some of us are still here to tell the tale to be honest, either I'm an exceptionally skilled rider (I doubt it) or that they wasn't that bad after all, well compared to some other makes/models of that time??
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Post by donkeychomp on Dec 2, 2019 0:14:30 GMT 1
It's where we all honed our riding skills. The LC was and still is a total nutters bike and give one to any lad who's just passed his test on some mundane 4 stroke and he'd crap himself. It made us all better riders and like Veg said...no other bike makes you giggle so much. Best bike ever made.
Alex
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Post by JonW on Dec 2, 2019 3:29:46 GMT 1
Big fan of funny front ends bike suspension hasn’t really changed in nearly 100 yrs primarily because we tend to be very pessimistic and traditional in our out look , big fan of people like tony foale ( my mechanical anti dive is based on his design) loved the tesi, gts 1000, elf etc The benefits of usd forks for me are wasted on an lc esp 4lo the biggest restriction is the frame design and all its inherent weakness that’s why I like jon’s build where he has braced the frame Yes, the stuff Jon and i did (too many Jons) with out frames was done to engineer some strength back into the frame to work better with the suspension front and rear off the RGV. I think in modern terms its still pretty bendy, but it gives the harder ends something to stop them meeting in the middle on the first bump.
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Post by JonW on Dec 2, 2019 6:37:43 GMT 1
PS Phillip, you might want to title your threads with something more about what the subject of the question or problem is rather that the type of bike. Just might help you get more replies and help people find the thread later if they have the same thing to ask.
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Post by earthman on Dec 2, 2019 9:21:28 GMT 1
PS Phillip, you might want to title your threads with something more about what the subject of the question or problem is rather that the type of bike. Just might help you get more replies and help people find the thread later if they have the same thing to ask. Yes, I agree.
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Post by earthman on Dec 2, 2019 9:25:04 GMT 1
It's where we all honed our riding skills. The LC was and still is a total nutters bike and give one to any lad who's just passed his test on some mundane 4 stroke and he'd crap himself. It made us all better riders and like Veg said...no other bike makes you giggle so much. Best bike ever made. Alex That were me back in the day, previous bike were a Honda 125 Superdream. Lol
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Post by Tobyjugs on Dec 2, 2019 10:22:07 GMT 1
It's where we all honed our riding skills. The LC was and still is a total nutters bike and give one to any lad who's just passed his test on some mundane 4 stroke and he'd crap himself. It made us all better riders and like Veg said...no other bike makes you giggle so much. Best bike ever made. Alex This made me laugh. The lad I know in my village was driving my bike before he even had a licence. Once he was at an motor bike event and KTM were giving out bikes for demos and the KTM man was telling Kees how good the Vitpil was. Kees went for a ride and came back very disappointed. The KTM man was also very disappointed after asking Kees what he thought about it. The 4LO Kees rides is around 65 pk
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