Ok so here's the scenario, as you already know on a scooter the engine IS the swingarm and is connected to the frame by the engine mount (as shown below) which is a pretty complicated thing. But on a normal bike swingarm all you have is a setup featuring 2 shock absorbers at the back and a big-ass bolt with some bearings on it at the front.. Now I'm just about ready to re-fit my engine but on inspection the engine mounting thing is rusted to hell the bushes etc are seized solid, the rubber is perished and the inner sleeves are beyone repair. So my questions are: Does it do anything other than allow the engine to pivot and remove vibrations from the engine? Could I fuck it off and fit a bike swingarm type setup instead by connecting the engine to just one common pivot point instead of that f#cking mess? Like in this shit drawing:
Re: Any reason why this would'not work? basicly a 50 mount... a h section solid mount, it will work BUT its there for a reason. this will make it light in corners on the front and more prone to skidding out. also the engine lifts/bounces about to save shock force smashing the engine to bits.
Re: Any reason why this would'not work? That mount acts as a cantilever so like MC says its more to do with when the engine is under load and its trying to stretch the shock absorber, say something like my Zip had your mod I'd probably exit a corner and wind it on only to be high sided as I had taken all the weight off the rear whilst exploiting full power. The difference with a motorbike is that all the heavy rotating engine mass is in front of the swing arm pivot were as on a ped it is behind. Have a look towards the end of my dyno video to see how it reacts under load.
Re: Any reason why this would'not work? Ah interesting, tar for the info,, I realised after I'd posted that topic that what I was actually asking was just what the silent mount was for and if it was absolutely nessasary. I'd assumed it was possibly there to remove engine vibrations from the frame in order to improve rider comfort in which case it could be removed. I don't mind the handling being a bit off (most of my bikes handle like shit anyway ), but I don't much fancy having the engine destroy itself. I can't work out where the vibrations would come from to be severe enough to f#ck things up though? surely the engine itself has a counter balance to remove most of the vibrations from the compression?
Re: Any reason why this would'not work? not atall... they run no balance shaft.. the whole engine snapping thing is simply as the engine IS the swingarm... so if it cant move upwardss/inwards aswell as the usual suspention movement it will get some BIG shints straight across the weak point, rather than the engine being more of a "floating" lump. ive done many a conversion to 2 stropkes an identical way but the vibrations are present and the mounts eat themselves with some fair regularity. plus speed humps are a real smash and run affair. no real reason to do this kind of mod tbh.. cna renew the mount fairly easily/nock somthing up to replace the worn sections.
Re: Any reason why this would'not work? Ah I see, now it all makes sence. Unfortunately the mod was out of necessity rather than choice, I priced up the replacement parts and I just don't have the cash (I'm self employed and there's no work at the minute). So grafting a bike swing arm on from one of my scrap frames would have been free.
Re: Any reason why this would'not work? well, nock the rusted peice of shit apart. grab some polly/bearings from somwhere and rebuild... there not all that complicated. it can be solid bearing and bush free as long as theres pivot on the silent block, not ideal but still better than removing it alltogether
Re: Any reason why this would'not work? Ok, I'll keep hold of it. Any idea if you can get the polly bearings from a bearing supplier on the cheap? as I can only seem to find them listed complete with rods on scooter parts sites at something daft like £20 a set.
Re: Any reason why this would'not work? i emnt ram a peice of polly in and drill down the middle... needle bearings can be bought real cheap from any supplier.. clean up the rods. will cost less than a fiver and some elbow grease to get it working as it should... kind of..
Re: Any reason why this would'not work? Ah, I getcha. Well I've hammered them out! and they're f#cking mullered bollocks, if I shove new bushes or even bearings on those f#cked rods they wouldn't last 2 minutes anyone know a cheap stockist of these: https://www.pmtuning.co.uk/Merchant2/merchant.mvc?Screen=PROD&Store_Code=PT&Product_Code=12-PAREPAIR
Re: Any reason why this would'not work? tbh mate if your on about the shock, that is cheap.. if your gonna look for another shock they will be more expensive. This shock is budget but is good
Re: Any reason why this would'not work? Nah, my bad, I posted the wrong link, fixed it now. Should have been this one: https://www.pmtuning.co.uk/Merchant2/merchant.mvc?Screen=PROD&Store_Code=PT&Product_Code=12-PAREPAIR
Re: Any reason why this would'not work? Duno anywhere that stocks cheaper, u tryed adrelaninpedstop??
Re: Any reason why this would'not work? have u tried bike scrapyards i dont know where you are but theres one not too far from me and u go down ther take what u want off a bike and he'll do u a deal just have a look on google 4 sum wer give em a bell to see what they got and then go down there
