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chain line with single sided swingarm

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chain line with single sided swingarm

Post by cooperte on Thu 02 Jun 2011, 18:52

i've just limped home on my 94 blade with vfr750 back end after it pulling the teeth off the rear sprocket while out.

i've been due a new chain and set of sprockets for a while now, but have been sorting out other things.

thing is - apart from being worn, the chain has been wearing a groove on the outside edge of the rear sprocket about 5-10mm. so i guess the chain line between the front sprocket and the rear sprocket is out by this much.. is there a way of sorting this? i was wondering if the easiest way would be to offset the front sprocket out from the engine by packing it somehow. how feasible does this sound? has anyone else ever had this problem with their vfr swingarm conversion?

or should i just get used to eating sprockets? Laughing

here is some pics of the sprocket. please ignore the horrible chain! it was like that when i bought the bike so am glad it's finally worn out!



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cooperte
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Number of posts : 65
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Re: chain line with single sided swingarm

Post by danidge on Thu 02 Jun 2011, 19:08

i know that when you do the conversion you have to have a certain sized spacer made for the right side? could be the wrong size spacers in there?
if you search on google for swingarm conversion there are a few how too guides that you could compare your spacers to. other than that i dont think im gonna be much help mate.
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danidge
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Re: chain line with single sided swingarm

Post by cooperte on Thu 02 Jun 2011, 20:16

i never did the conversion, it was already done when i bought it. i had a look before though and there seems no way to move the swingarm from side to side unless i'm missing something. just trying to get an idea of what i could do to try and stop it. i can live with it if it's going to be a big job, i'll just buy aluminium rear sprockets and let that be the sacrificial element and get used to changing it more often
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cooperte
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Re: chain line with single sided swingarm

Post by Guest on Thu 02 Jun 2011, 21:07

Could be two things, spacer on swingarm spindle is normally 25mm wide, 25mm o/d, 20mm i/d or wheel is not centred on shaft and hence sprocket not aligned. Outside face of front sprocket should align with outside face of rear, there should be a bit of side play if you slide chain links side to side on sprockets. Align rear using spacers or front using an old sprocket centre, machined and welded to new one!
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Re: chain line with single sided swingarm

Post by cooperte on Thu 02 Jun 2011, 22:32

sorry to be thick, but i don't know what you mean mega..

here's some pics i've took of where the swingarm connects. what is the spacer that you mean?







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cooperte
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Number of posts : 65
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Re: chain line with single sided swingarm

Post by Cove on Thu 02 Jun 2011, 23:29

I think your missing a standard bush from the sprocket side of the swingarm,where it mounts on the swingarm spindle.It should line up and not require any spacers on the left to be made up.
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Cove
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Re: chain line with single sided swingarm

Post by Cove on Thu 02 Jun 2011, 23:32

number 9 on this fichehttp://www.ronayers.com/Fiche/TypeID/26/Type/SWINGARM/MakeID/1/Make/Honda/YearID/34/Year/1993/ModelID/6697/Model/VFR750F/GroupID/283743/Group/SWINGARM
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Cove
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Re: chain line with single sided swingarm

Post by cooperte on Fri 03 Jun 2011, 18:02

wow - that looks a simple fix, thanks! i'll source that bush from somewhere and i can change it at the same time as my chain and sprockets

thanks cove, mega, and dan
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cooperte
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Number of posts : 65
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Re: chain line with single sided swingarm

Post by Guest on Fri 03 Jun 2011, 18:29

Any time mate!
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Re: chain line with single sided swingarm

Post by danidge on Fri 03 Jun 2011, 19:25

i would take it apart and just check with the diagram first to see what your missing, i wouldnt wanna be ordering anything for no reason.
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danidge
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Re: chain line with single sided swingarm

Post by danidge on Fri 03 Jun 2011, 19:31

although i think cove is right btw Razz

cove, if that collar is missing wouldnt the swingarm move about? cause that collar sits inbetween the needle roller bearing and the spindle doesnt it?
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danidge
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Re: chain line with single sided swingarm

Post by Cove on Fri 03 Jun 2011, 20:09

I think it sits between the chassis and the face of the bearing, i should really check but really need to get an abba stand, its not fun trying to balance the blade on axle stands and rearsets
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Cove
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Re: chain line with single sided swingarm

Post by Guest on Fri 03 Jun 2011, 20:37

Yeah, the bigger diam collar fits against the frame and the smaller diam fits inside the bearing seal.
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Re: chain line with single sided swingarm

Post by cooperte on Mon 06 Jun 2011, 18:11

thanks lads! thumbup i managed to remove the rear swingarm over the weekend and i found that everything seemed to be there that should be there. so i measured the worn part of the rear sprocket and fitted washers to shift the swingarm over the same distance. there already was a washer there, so i added two more to the same thickness as the wear i measured. this meant i had to adjust the castellated nut on the other side of the pivot to the same amount (3 mm) to allow the washers to fit.

the chainline now looks pretty well lined up when i lay my old knackered chain on it. i've ordered new chain and sprockets so the big test will be when i put some tension on it. i've gone for -1 on the front and +2 on the back so looking forward to trying it out. i had that set up on my old R6 and it transformed the bike, so am hoping it'll be good. will post up after i've fitted it and tested it..

here's some pics in case it's any help to anyone else..

the loose swingarm floating.. here's where i put in the washers



measuring the wear on the sprocket



washers about the same



the threaded bush on the other side of the pivot



adjusting the castellated nut to the same distance



the old chain lying flat on the two sprockets to check it's lined up



i hope this has sorted it and if it has, maybe it'll help someone else with the same problem
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cooperte
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Number of posts : 65
Male Age : 46
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Re: chain line with single sided swingarm

Post by Guest on Mon 06 Jun 2011, 18:32

Start by checking the rear wheel is in alignment with the front and in the centre of the frame. When you fit the new C&S, use a straight edge to check the sprocket alignment. Also check that there is a small amount of movement on both sides of the chain. Good pix and write up mate, hope it comes together OK for ya!
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Re: chain line with single sided swingarm

Post by cooperte on Mon 06 Jun 2011, 18:52

cheers mate. will do!
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cooperte
CBT Novice

Number of posts : 65
Male Age : 46
Location : workington
My bike(s) : 94 blade, 02 r6
Registration date : 2010-06-12

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Re: chain line with single sided swingarm

Post by cooperte on Tue 07 Jun 2011, 23:59

all seems lined up so put it together and went for a squirt round the block and the power feels quite brutal now with the new sprockets. i suppose it doesn't compare with the latest weapons with 180bhp etc, but my arms don't notice that when i'm riding it. i like these old blades Smile


Last edited by cooperte on Wed 08 Jun 2011, 01:29; edited 1 time in total
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cooperte
CBT Novice

Number of posts : 65
Male Age : 46
Location : workington
My bike(s) : 94 blade, 02 r6
Registration date : 2010-06-12

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Re: chain line with single sided swingarm

Post by Guest on Wed 08 Jun 2011, 00:11

Nice one mate. Got any more pix and a video???
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Re: chain line with single sided swingarm

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