- Sun Oct 29, 2017 5:11 pm
#71781
Talking about a Honda XBR 500 this one is still for sale}-------------
Forum
For Royal Enfield owners and enthusiasts
- Mon Oct 30, 2017 8:15 am
#71784
I'm puzzled, Tom. Why would you retain a 17 tooth gearbox sprocket? It sounds like you want to get far more power than standard from your engine and so it should comfortably pull higher gearing. You may not want to do 100 mph, but it's nice to be able to cruise at 65-70 mph with the revs at about 4000, as my bike does with a 20 tooth sprocket. When I fit the 5-speed gearbox I'm going to try a 21 tooth. It may be a step too far - we'll see! (btw, it's a Tollgate Classics 625 engine.)
- Mon Oct 30, 2017 9:38 am
#71785
Hi guys--- yes my line of thinking as well Another Allen.........Hi TOM, once you have your desired type of power output I think you'll find that, as A.Allen says cruising at 65-70 MPH is probably it's best benefit followed closely by better acceleration and ---- dare I say it ??----improved economy !!
Just the act of fitting a 5-speed box will immediately do away with that HUMUNGUS GAP that exists between 3rd. and 4th. gear on the 4-speed box and daily riding in modern traffic becomes a pleasure once more...But alas, that's NOT the end of our venture into high(er) power and thus performance....It must be considered as a whole package so things such as the rolling chassis, the tyres, the rear shocks, the braking system's performance etc. all come into play....Indeed, there is a school of thought that says you ought to do all of this in reverse order !!....ie}-- prepare your bike first for the increased performance that's about to follow...
Finally if I might add to BW's comments ??........Technically Torque is defined as the turning effect about a fixed point or fulcrum...So with your crankpin permanently set at "x" mm from the crankshaft centre then there is that "Torque not lost" Paul referred to.....Another word for "Flywheel effect" is Momentum and that is the product of Mass multiplied by velocity....Therefore if you alter either ( or both ) of these you will get a permanent change in the case of Mass, or a variable change in the case of velocity.....In our case Velocity is known generally as RPM....( Or to get really technical it's measured in RADIANS per second..( https://en.wikipedia.org/wiki/Radian
)...So as you can see that when you are sat at the traffic lights anxiously blipping the throttle and "Keen-for-the-Green" you are actually altering your Flywheel effect yet keeping the designed Torque at a constant...
Just the act of fitting a 5-speed box will immediately do away with that HUMUNGUS GAP that exists between 3rd. and 4th. gear on the 4-speed box and daily riding in modern traffic becomes a pleasure once more...But alas, that's NOT the end of our venture into high(er) power and thus performance....It must be considered as a whole package so things such as the rolling chassis, the tyres, the rear shocks, the braking system's performance etc. all come into play....Indeed, there is a school of thought that says you ought to do all of this in reverse order !!....ie}-- prepare your bike first for the increased performance that's about to follow...
Finally if I might add to BW's comments ??........Technically Torque is defined as the turning effect about a fixed point or fulcrum...So with your crankpin permanently set at "x" mm from the crankshaft centre then there is that "Torque not lost" Paul referred to.....Another word for "Flywheel effect" is Momentum and that is the product of Mass multiplied by velocity....Therefore if you alter either ( or both ) of these you will get a permanent change in the case of Mass, or a variable change in the case of velocity.....In our case Velocity is known generally as RPM....( Or to get really technical it's measured in RADIANS per second..( https://en.wikipedia.org/wiki/Radian
)...So as you can see that when you are sat at the traffic lights anxiously blipping the throttle and "Keen-for-the-Green" you are actually altering your Flywheel effect yet keeping the designed Torque at a constant...
- Mon Oct 30, 2017 11:52 pm
#71792
Some additional info}-------- From my last rantings, you might ask "If only we had an adjustable stroke big-end we could have adjustable torque"..........OK a bit far-fetched maybe but the principle does exist within the workings of the humble Shaping Machine..Have a look at this}----------------
- Mon Oct 30, 2017 11:57 pm
#71794
The length of stroke of the ram is altered by adjusting the position of the crank pin closer or further to the Bull Gear centre.....Alas the down side is that due to the Whitworth effect the ram returns faster than it goes forwards so no good for our needs...But technically interesting none the less...
- Tue Oct 31, 2017 2:50 pm
#71814
Ive no issue with lowering the gearing as long as the engine revs out!
Tom
Tom
- Tue Oct 31, 2017 8:04 pm
#71819
Hi TOM---------this from another thread for IMG BB}--(https://imgbb.com/)-
Hi ARTY------- try this}--1) At their home page entitled-- "UPLOAD AND SHARE YOUR IMAGES.".. go to the bottom of the page and left clik onto the blue box entitled--- "START UPLOADING"....2) Select your image, left clik onto it..This will take you into the next page which is entitled...."EDIT OR RESIZE ANY IMAGE BY CLICKING THE IMAGE PREVIEW"...Below this will be your image and below that is a Green box with UPLOAD in it......3) This will take you into the next page entitled UPLOADING and then eventually the next page which has at the top a green circle with a white tick in it...below that it says "UPLOAD COMPLETE." ... below that is your image and below that says "EMBED CODES".. left click on Viewer Links for a drop-down menu.....Click onto "HTML Full linked"...Hover your pointer over the lower, longer box and you will see "COPY" appear in it's top right hand corner.....Left click on that and the long box will momentarily glow a yellow colour.....4) You now go to the Hitchcocks page that you are writing in and "Click and paste" in the normal way.....The HTML code will now appear in your text BUT will change to a photo when you finally click "POST REPLY" ...
It might take you a bit of time to start with so don't forget to "Save" it all before posting the reply or you'll find you've been timed -out and lost the lot !! ( Ask me how I know that bit of info !! )
Hi ARTY------- try this}--1) At their home page entitled-- "UPLOAD AND SHARE YOUR IMAGES.".. go to the bottom of the page and left clik onto the blue box entitled--- "START UPLOADING"....2) Select your image, left clik onto it..This will take you into the next page which is entitled...."EDIT OR RESIZE ANY IMAGE BY CLICKING THE IMAGE PREVIEW"...Below this will be your image and below that is a Green box with UPLOAD in it......3) This will take you into the next page entitled UPLOADING and then eventually the next page which has at the top a green circle with a white tick in it...below that it says "UPLOAD COMPLETE." ... below that is your image and below that says "EMBED CODES".. left click on Viewer Links for a drop-down menu.....Click onto "HTML Full linked"...Hover your pointer over the lower, longer box and you will see "COPY" appear in it's top right hand corner.....Left click on that and the long box will momentarily glow a yellow colour.....4) You now go to the Hitchcocks page that you are writing in and "Click and paste" in the normal way.....The HTML code will now appear in your text BUT will change to a photo when you finally click "POST REPLY" ...
It might take you a bit of time to start with so don't forget to "Save" it all before posting the reply or you'll find you've been timed -out and lost the lot !! ( Ask me how I know that bit of info !! )
Shop for accessories at Hitchcocks Motorcycles