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Post by kidda on Jul 30, 2015 12:13:20 GMT
Just about to replace all the bearings in the engine,is it normal for the Cush drive to rattle?i know there is springs in it but should it rattle?dont want to strip it down and replace everything if I don't need to,also any tips on replacing the engine bearings would be really helpful,cheers folks
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Post by henri on Jul 30, 2015 14:27:33 GMT
shouldnt be rattling at all ,was the clutch plates still in or a bare basket ,as bare baskets shouldnt rattle at all ,H
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Post by kidda on Jul 30, 2015 15:20:16 GMT
Cush drive not clutch,the springs are inside the main drive cog,gave it a shake because I was cleaning it up ready to refit and I can hear it rattling?is this normal?also crankshaft seals,am I right in saying the main seal faces outwards(metal plate)bearing side and the lip outwards,and the flywheel seal faces inwards ( lip and metal spring on the seal inwards?i can't remember the which way round they were when I pulled them out,cheers
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Post by kidda on Jul 30, 2015 17:55:54 GMT
Would you replace the Cush drive as a matter of course if you were doing a full rebuild with new bearings,seals etc?cheers folks
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Post by sime66 on Jul 30, 2015 18:39:50 GMT
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Post by kidda on Jul 30, 2015 18:55:28 GMT
Cheers sime66 I'll check them out.
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Post by henri on Jul 30, 2015 19:01:35 GMT
oops ,yep was having a brain-fart earlier , a days welding grinding will do that to ya , an a cush drives a judgement call to me not a automatic replace like seals n cruccy ,unless engines being tuned/upgraded an heavier springs are required , but any rattle means its not working anymore so all stress is put directly into gearbox .if ya reckon its been gone a long time a close examination of gearbox bearings/gears an output shaft splines is what i'd do , an as sime says ,lip seals springs on pressure side , an for the metal seals i'll have to think of a way of describing it, brains still farting away n cant think , H
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Post by kidda on Jul 30, 2015 19:56:40 GMT
Sound that is fellas you have gave me the info needed,here's another one for you,what's the best way to re-install the crank?am I going to have to fabricate something or is there an easier way?cheers
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Post by henri on Jul 31, 2015 5:17:37 GMT
you can get crank instalation tools to pull it into clutch side ,an some ive heard of using a clutch basket an washers/spacers to pull it in ,myself i freeze crank in freezer for half hour an use a heat gun on bearing ,an with rod at BDC slip a cold chisel/wedge inbetween crank webs an a nut on flywheel threads an drive it in with taps from a rubber mallet. if freezing put in a plastic bag with a blast of wd40, as it will frost up an the moisture will encourage flash-rusting .you can get crank spacing tools but i do it by eye,getting middle of rod inline with gasket face of clutch case .a check with steel rule with flyside case popped on an nipped up is reassuring ,as is turning crank an making sure its not binding/rubbing anywhere . an sorry bout earlier mix up,realised i was thinking of smallframe clutches .H
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Post by vespasco on Jul 31, 2015 6:58:13 GMT
Until i bought a cheap crank installation tool i used to use the clutch to pull in the crank.
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Post by kidda on Aug 1, 2015 20:04:09 GMT
Stripped the Cush drive down and you were right folks 5 out of the 6 springs had snapped,in the new kit are 2 sets of springs,large and small and are supposed to be used in conjunction on 200cc scooters,would it make any difference if I used both on mine?going put a 177 kit etc,cheers folks
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Post by kidda on Aug 1, 2015 20:12:46 GMT
Also sorted the crank out I put it in earlier,cheers for the advice folks,slowly coming together.
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Post by sime66 on Aug 1, 2015 21:07:25 GMT
I think most who just kit a 125 don’t double-up the cush-drive springs, especially as it’s inside the engine. But I did on my 177 because I did a bit of a tune too, and was replacing my springs anyway as part of the engine build. So I don’t have a definite answer for you, but I decided double springs was sensible for mine. I’ll be interested to see if you get other opinions here.
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Post by kidda on Aug 1, 2015 22:19:36 GMT
I was thinking 2 springs have got to be better than one if they are sucepptale to snapping like the ones that were in mine,have to see what everyone thinks,cheers sime
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Post by henri on Aug 2, 2015 7:40:14 GMT
on a stock motor singles are best ,but a tuned 177 is close to power of a stock 200 so i'd use doubles ,or look around for the uprated single springs , vespaco's rally improvement thread covered getting tough springs in recently ,check out his method ,i use it aswell n it works well , H
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Post by kidda on Aug 2, 2015 15:05:26 GMT
Sorted,going use 2 springs,just going take the drive in work borrow the use of the vice,cheers fellas
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Post by vespasco on Aug 2, 2015 20:53:32 GMT
I think id also try double springs if your going for a kit etc Ive gone for reinforced ones in my 225
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