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  • #34287
    John Stevenson 1
    Participant
      @johnstevenson1
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      #209853
      John Stevenson 1
      Participant
        @johnstevenson1

        This post /forum for all general motorcycle related topics as requested.

        Don't have time now but I'll add my input to it tonight.

        #209855
        Nick_G
        Participant
          @nick_g

          .

          OK I will add to this thread with a question.

          I understand how centrifugal force works. But I am informed that when a motorbike is cornering it is centripetal force that keeps the machine and rider (hopefully wink. ) shiney side up.!

          I have tried google to understand this but TBH it goes over my head. Can anybody explain to me in dunce type language how centripetal force works.?

          Cheers, Nick

          #209857
          KWIL
          Participant
            @kwil

            Centrifugal force is the force acting outwards due to circular motion (of bike or any other object). Centripetal force is the tension in the string preventing the stone (or other object) from flying outwards away from centre of rotation.

            In the case of the M/C, having the weight of the rider and bike inwards and downwards from the point of contact with the road applies a rotational force opposite to the centrifugal force. Small riders lean further in!

            #209858
            Hopper
            Participant
              @hopper

              And when you have done that, explain to us which is better: synthetic oil or dino.laugh

              As I understand it, if you swing a ball around on the end of a string, centrifugal force tries to hurl the ball outwards. Centripital force is the string that stops it from going outwards. Which I guess would be the traction of the motorcycle tires. But there is no end (literally) of variations on the theme.

              Great idea for a thread by the way. I had thought of raising the possibility before when looking at the aircraft discussion thread. Here is a pic of my latest project (long term, little progress of late times), a Harley WLA engine in a Norton Featherbed frame. Upsets the purists on both sides. devil

              #209861
              HasBean
              Participant
                @hasbean

                I was always taught that centrifugal force doesn't actually exist, only centripetal force which is preventing the body from moving in a straight line which it is want to do.

                 

                Paul

                 

                Oh, and to try to keep on thread 

                dscf0047.jpg

                (not everyone's cup of tea though I guess…)

                 

                Edited By HasBean on 30/10/2015 11:33:34

                #209864
                Nick_G
                Participant
                  @nick_g
                  Posted by HasBean on 30/10/2015 11:23:01:

                  Oh, and to try to keep on thread

                  .

                  And I will do the same. smiley

                  I am thinking of getting a bigger bike though. Not because I want to go faster. (Even a Hornet is far quicker and capable than I will ever be.) It's just that bigger bikes are more 'planted' on the road and are easier to ride. Especially if you have some totty on the back.

                  Taken in Howth, Just south of Dublin.

                  Nick

                  #209865
                  michael cole
                  Participant
                    @michaelcole91146

                    Counter steering, feels weird but it works. ie turn the bars one way and the bike goes the other .

                    Mike

                    only got a BMW R100t now.

                     
                    #209867
                    JA
                    Participant
                      @ja
                      Posted by HasBean on 30/10/2015 11:23:01:

                      I was always taught that centrifugal force doesn't actually exist, only centripetal force which is preventing the body from moving in a straight line which it is want to do.

                       

                      Paul

                       

                      Yes, I was taught that at school along with "every force has an equal and opposite reacting force".

                      Both exist.

                      Got four bikes taxed and a failed hip. Very unhappy.

                      JA

                      Edited By JA on 30/10/2015 11:55:20

                      #209869
                      Gordon W
                      Participant
                        @gordonw

                        Have had loads of bikes, but now age and wife stopped it all. Ps never liked anyone on the back, not moving anyway.

                        #209886
                        GarryC
                        Participant
                          @garryc

                          Heck you're going to need a bigger server if we can upload bike pics now as well smile

                          bike.jpg

                          #209887
                          Involute Curve
                          Participant
                            @involutecurve

                            We should have had a thread for this ages ago, real busy at the moment but will try to contribute something relavant later.

                            Shaun

                            #209891
                            Nick_G
                            Participant
                              @nick_g

                              .

                              And for all you affectionados of British bikes here is some video of my friends restored Norton.

                              Nick

                              #209892
                              Cornish Jack
                              Participant
                                @cornishjack

                                But what about this?? http://www.bbc.co.uk/news/technology-34665442 – I thought Honda had one already!!

                                rgds

                                Bill

                                Edited By Cornish Jack on 30/10/2015 14:05:15

                                #209893
                                Nick_G
                                Participant
                                  @nick_g
                                  Posted by Cornish Jack on 30/10/2015 14:04:39:

                                  But what about this?? **LINK** I thought Honda had one already!!

                                  rgds

                                  Bill

                                  Edited By Cornish Jack on 30/10/2015 14:05:15

                                  .

                                  Well I hope it's better than Hondas latest F1 engine offering. wink

                                   

                                  Nick

                                  Edited By Nick_G on 30/10/2015 14:09:12

                                  #209896
                                  colin hawes
                                  Participant
                                    @colinhawes85982

                                    I've got a 250 ohv twin BSA Sunbeam scooter (in pieces) which I intend to restore in the future. One problem is likely to be sourcing a new white/grey rubber floor mat. Colin

                                    #209909
                                    Neil Wyatt
                                    Moderator
                                      @neilwyatt

                                      +1 to what Paul says – if a bike unsticks, it goes forwards in a straight line, it doesn't fly outwards.

                                      Neil

                                      #209916
                                      OuBallie
                                      Participant
                                        @ouballie

                                        Love that Norton, and the difference between old and new cars/bikes overloaded with computers.

                                        Mention of RC motorcycles, I sold an RC model, of a Honda I think it was, in my shop in the '80s.

                                        Everyone was sceptical, including myself, until that is I built one and tested it.

                                        It worked a treat, with the 'steering' servo tilting the whole body of the bike aft of the front forks.

                                        Here's my contribution, not mine I hasten to add, but it reminded me of my CB350 Twin I bought in 1972.

                                        2015 and still in Ex-factory condition:

                                        Honda 175

                                        License disc says it all:

                                        Honda 175

                                        Even more so the odometer!:

                                        Honda 174

                                        Can confirm what Mike said about counter steering, it's the quickest way to put a 'bike down or get into a corner fast.

                                        It went against the grain until tried, but too much and you are down.

                                        Geoff – 4 wheels for me now, though I miss the feeling of freedom!

                                        #209923
                                        Anonymous

                                          Bloody typical, a bike thread is started just as I have had to call it day after 40 odd years of biking crying, knees and back have forced it on me. Can't even face carrying on with my Kettle project and not being able to use it so that's just gone as well. At least I can keep in touch making bits for others as I've done for a few years and seriously consider the unthinkable of getting a scooter for knocking about on, I HATE cars with a passion, won't use the wife's unless I really have to.

                                          #209925
                                          jim’
                                          Participant
                                            @jim11037

                                            dsc00332.jpg

                                            #209929
                                            Roger Williams 2
                                            Participant
                                              @rogerwilliams2

                                              Did anyone see the Rossi – Marquez saga from Sepang on Sunday !!. I reckon Marquez was asking for it…..

                                              #209930
                                              JA
                                              Participant
                                                @ja

                                                Some riders who used Tritons said that counter-steering was required, even if they did not realise it at the time, since the frame was too stiff. Personally I have only ridden one for a few miles.

                                                Counter-steering is worth trying. You won't fall on the floor.

                                                Geoff – I like the little Honda. Like all popular bikes, they were everywhere and then disappeared overnight.

                                                JA

                                                #209932
                                                Old Elan
                                                Participant
                                                  @oldelan
                                                  Posted by Roger Williams 2 on 30/10/2015 17:29:41:

                                                  Did anyone see the Rossi – Marquez saga from Sepang on Sunday !!. I reckon Marquez was asking for it…..

                                                  What knee on what front brake lever?

                                                  wink

                                                  Another take…

                                                  https://www.facebook.com/WBMotors/videos/1087753337936475/

                                                  Love the Fazers. This one is mine….

                                                  Dorking Erly Nauties to see a Steam Excursion

                                                  #209935
                                                  Raymond Anderson
                                                  Participant
                                                    @raymondanderson34407

                                                    What do most of these posts have to do with "model engineering "? Are they all requiring parts made for them ?

                                                    or modelled perhaps !! A put put forum might be a better place for this.

                                                    #209938
                                                    Old Elan
                                                    Participant
                                                      @oldelan

                                                      The clue could be in the heading……

                                                      Yes, the older they get the more bits you have to make.

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