clivegto Posted February 17 Author Share Posted February 17 8 hours ago, busa ash said: Looking good clive Cheers mate. 8 hours ago, BasilBrush said: The swinger pivot point is really interesting. So much wider than a normal bikes. I assume that is to stop flexing at the pivot point ? No chain slack 2 Quote Link to comment
DAZ Posted February 17 Share Posted February 17 8 hours ago, BasilBrush said: The swinger pivot point is really interesting. So much wider than a normal bikes. I assume that is to stop flexing at the pivot point ? The swing arm pivots on the same axis as the output shaft on pivots either side of the engine , which stops the compression and release of the rear suspension as power is applied and let off it's a great theoretical exercise to optimise handling, and in competition where times to a 100th of a second matter it could be the difference between winning and losing and as @clivegto points out means you don't need to run a slack chain to allow for the normal movement of a swing arm relative to the output shaft 1 Quote Link to comment
clivegto Posted February 17 Author Share Posted February 17 16 minutes ago, DAZ said: The swing arm pivots on the same axis as the output shaft on pivots either side of the engine , which stops the compression and release of the rear suspension as power is applied and let off it's a great theoretical exercise to optimise handling, and in competition where times to a 100th of a second matter it could be the difference between winning and losing and as @clivegto points out means you don't need to run a slack chain to allow for the normal movement of a swing arm relative to the output shaft That's what I said right 2 Quote Link to comment
BasilBrush Posted February 17 Share Posted February 17 Almost like direct drive between output shaft and rear axle. Rather than rear axle being lower then the output shaft and producing squat of rear end under hard acceleration. Seems weird how manufacturers don`t use similar system on road bikes Quote Link to comment
imago Posted February 17 Share Posted February 17 1 hour ago, BasilBrush said: Almost like direct drive between output shaft and rear axle. Rather than rear axle being lower then the output shaft and producing squat of rear end under hard acceleration. Seems weird how manufacturers don`t use similar system on road bikes Because it was a great theory, but made four parts of sod all difference in practice. It also threw up a whole raft of other problems with respect to maintenance and repair. Then as time and research moved on other things brought greater gains for handling, centralising rotating mass for example which mitigates the gyroscopic effect that affects cornering. 1 Quote Link to comment
clivegto Posted February 17 Author Share Posted February 17 9 minutes ago, imago said: Because it was a great theory, but made four parts of sod all difference in practice. It also threw up a whole raft of other problems with respect to maintenance and repair. Then as time and research moved on other things brought greater gains for handling, centralising rotating mass for example which mitigates the gyroscopic effect that affects cornering. Yeah that's the plan, it's really grown on me this project. It's going to be a proper weapon when I've finished it, well in me head anyway Quote Link to comment
clivegto Posted March 9 Author Share Posted March 9 Though I best take the swingarm arm out for a look see, hade to make a slide hammer up to get the 2 swinging arm bolts out. A very interesting bearing arrangement in there. 5 Quote Link to comment
BasilBrush Posted March 9 Share Posted March 9 25 minutes ago, clivegto said: Though I best take the swingarm arm out for a look see, hade to make a slide hammer up to get the 2 swinging arm bolts out. A very interesting bearing arrangement in there. Swinger looks even weirderer out of the bike. They put alot of fabrication into that. Hope it makes a difference when you ride it. if it feels any different to a normal style swinger Quote Link to comment
clivegto Posted March 9 Author Share Posted March 9 1 hour ago, BasilBrush said: Swinger looks even weirderer out of the bike. They put alot of fabrication into that. Hope it makes a difference when you ride it. if it feels any different to a normal style swinger Wide indeed it is, it's been chopped from original and I plan on chopping it again to something more like in this picture. Am really looking forward to flying around on this but it'll be a while yet . 1 Quote Link to comment
BasilBrush Posted March 9 Share Posted March 9 3 hours ago, clivegto said: Wide indeed it is, it's been chopped from original and I plan on chopping it again to something more like in this picture. Am really looking forward to flying around on this but it'll be a while yet . Be interesting to read your thoughts in comparison between this bikes swinger and normal one. When you start riding it. Quote Link to comment
Dezza Posted March 10 Share Posted March 10 Are the bearings salvageable? Replacements aren't going to be cheap . Quote Link to comment
clivegto Posted March 10 Author Share Posted March 10 7 hours ago, Dezza said: Are the bearings salvageable? Replacements aren't going to be cheap . Bearings are good but might replace them anyway as the big one's will have to be removed when the arm is powder coated. 1 Quote Link to comment
imago Posted March 10 Share Posted March 10 16 hours ago, clivegto said: Though I best take the swingarm arm out for a look see, hade to make a slide hammer up to get the 2 swinging arm bolts out. A very interesting bearing arrangement in there. That's a very similar set up to Can Am MX and T'n'T head bearings, a bit over complicated but it seems to outlast taper rollers for wear. Quote Link to comment
Dezza Posted March 10 Share Posted March 10 My Spondon has similar bearings, although they're obviously smaller as it has a conventional swingarm. Quote Link to comment
clivegto Posted March 10 Author Share Posted March 10 50 minutes ago, Dezza said: My Spondon has similar bearings, although they're obviously smaller as it has a conventional swingarm. Yes like one os my other Spondon arms. 1 Quote Link to comment
clivegto Posted March 10 Author Share Posted March 10 There appears to be some bodgery gone on hear on the sea saw top thingy. A spacer is completely missing and the bearings have been pushed out 9mm in total which has resulted in contact between the 2 arms and the frame. Presumably to fit the wide yam shock. Quite amazing the suspension worked at all like this. Did I mention I have a Ohlins Shock for this . 1 Quote Link to comment
clivegto Posted March 10 Author Share Posted March 10 (edited) Ohlins Shock is for an 1100 slabby and is to long . Pressed the bearings out of the sea saw things cleaned them up then warmed them up and pressed a big socket through them to push the disfigured lip back which it did then promptly snapped of. But there is still a lip on the edge to seat the bearings on each one, happy dayz also made a new spacer to take the place of the missing one. Picture of red framed one is how from what was described to me by the previous owner is how the arm looked origanly. I have sourced another Spondon arm that I'm planning on using with this. Edited March 10 by clivegto 2 Quote Link to comment
clivegto Posted March 17 Author Share Posted March 17 (edited) I put the swingarm back in made some wheel spacers to centre the zx10r Dymag back wheel. Took it with me to Etto's when I picked the aluminium GS tank up to discuss the swingarm arm. He would make me another but it would be very expensive and he is booked up with work until next summer, so coming back to the idea of doing it myself. Edited March 17 by clivegto 5 Quote Link to comment
clivegto Posted March 23 Author Share Posted March 23 That nice man @Gsxrsamgave me a cut down lock-up clutch extension and a FBM cover for it so I set about making it fit a clutch cover. There ain't a lot of room between the clutch and the frame but it should be doable. 4 Quote Link to comment
DAZ Posted March 23 Share Posted March 23 You never fail to impress @clivegto with your can-do get to it attitude to making stuff fit 4 Quote Link to comment
clivegto Posted March 23 Author Share Posted March 23 1 hour ago, DAZ said: You never fail to impress @clivegto with your can-do get to it attitude to making stuff fit Cheers man. Quote Link to comment
clivegto Posted March 23 Author Share Posted March 23 Just putting this hear for reference, same battery and coil mounts as mine 2 Quote Link to comment
clivegto Posted Monday at 10:31 AM Author Share Posted Monday at 10:31 AM Came across a Ducati swinging arm that had been fitted to an EFE frame with Spondon drag slots at Stafford bike show so I promptly bought it along with the frame too egged on by @Paulmand @imago 2 Quote Link to comment
imago Posted Monday at 10:46 AM Share Posted Monday at 10:46 AM 12 minutes ago, clivegto said: Came across a Ducati swinging arm that had been fitted to an EFE frame with Spondon drag slots at Stafford bike show so I promptly bought it along with the frame too egged on by @Paulmand @imago I get what you and a couple of others were saying about the welding on the arm being more purposeful than pretty, but I really like the look of that arm. Harvest the slots for your Spondon arm and replace them with something else and that arm and frame would be the beginnings of something good IMHO. 1 Quote Link to comment
Paulm Posted Monday at 11:19 AM Share Posted Monday at 11:19 AM 47 minutes ago, clivegto said: Came across a Ducati swinging arm that had been fitted to an EFE frame with Spondon drag slots at Stafford bike show so I promptly bought it along with the frame too egged on by @Paulmand @imago I would say we helped you along with your decision to buy it Clive,along the lines of "get it bought Clive" 2 Quote Link to comment
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