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Post by badger69 on May 14, 2022 17:59:01 GMT 1
Just about to change rings on LC 250 can anyone give me advice on how to fit them without breaking them, only ever done a head gasket change before, do I fit top first then bottom, any advice on the best way will help me as I know there is a unbelievable amount of help on here, all help thanked, and yes I done a search first but could not find what I needed to know, is there a good utube video I could look at, thanks again stay safe.
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Post by midlifecrisisrd on May 14, 2022 18:51:19 GMT 1
Fit the bottom ring first
If you do top first you'd have to get the bottom one past it
Ring ends with 2 thumb nails and gently pry open and slide down the piston into the groove
Steve
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Post by badger69 on May 15, 2022 9:01:47 GMT 1
Fit the bottom ring first If you do top first you'd have to get the bottom one past it Ring ends with 2 thumb nails and gently pry open and slide down the piston into the groove Steve Thanks mate can always rely on you, great advice, I would have fitted top first, thanks again, stay safe, |
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Post by jon on May 15, 2022 9:22:08 GMT 1
It’s difficult to put into words, but I’ll try.
I put on end on the ring below the crown and then slowly go round the ring pulling it down. Once it’s all round I wriggle it down bit by bit on a helix.
Jon
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Post by jessy03 on May 15, 2022 11:13:03 GMT 1
Check the ring gap as well👍👍👍will probably be fine but I would check
Jess
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Post by chrisg on May 15, 2022 11:16:08 GMT 1
Be carefull to put them on the right way round. Often the little ant-rotation pin on the piston is off-set.
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Post by yamman1066 on May 15, 2022 12:31:51 GMT 1
also clean the carbon from the back of the piston where the rigns fit
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Post by abar121 on May 15, 2022 12:35:53 GMT 1
and also lube everything up before fitting them.
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Post by chrisg on May 15, 2022 12:46:18 GMT 1
and also lube everything up before fitting them. Top tip. Lube work with many things to make better. 😁 |
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Post by geoffers997 on May 15, 2022 13:21:14 GMT 1
I used Permatex assembly lube on mine - super slippy stuff, seems to have rocketed in price since I bought it though
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Post by chrisg on May 15, 2022 20:18:17 GMT 1
Just wondered why your changing the rings? Low compression?
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Post by badger69 on Jun 4, 2022 9:30:40 GMT 1
Just wondered why your changing the rings? Low compression? Yes low compression and lots of blue smoke, bike hasn't been started for about 6 months. |
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Post by chrisg on Jun 4, 2022 10:38:43 GMT 1
Just wondered why your changing the rings? Low compression? Yes low compression and lots of blue smoke, bike hasn't been started for about 6 months. Blue smoke is mandatory on 2 strokes.😁 |
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Post by badger69 on Jun 4, 2022 14:10:51 GMT 1
Yes but lots, much oil dripped from exhaust on start up after 6 months and head gasket change, but compression is very light , great advice as all ways.
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Post by JMW on Jun 4, 2022 18:06:37 GMT 1
I’m really surprised at this thread.
Is this for real??
I would suggest buying a bible (Haynes manual) and read.
It’s a really good source of knowledge and also explains a great deal about examining the top end.
Changing rings - great idea but what if the bores are glazed??
Check the ring gap - how this is done and what it means
Benefits of a rebore and hone
New small ends / circlips
While you’re in there clean the exhaust port
Maybe consider contacting Mick for a mild tune
How to check the head and barrel tops are flat
So on and so forth
Buena fortuna!
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Post by abar121 on Jun 4, 2022 18:43:21 GMT 1
I've had two bikes now, where the previous owner had fitted new rings to worn out barrels. I don't get it.
In fact the 2nd one also had new Jap pistons in it too. Both low on compression and measured worn out. Now rebored and rebuilt.
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Post by JMW on Jun 4, 2022 20:00:18 GMT 1
So,
when you’re on a budget and really struggling but want the best your budget can cope with or, you’re just looking to sell it on then a re-ring is usually a really short term thing.
The thing about top ends is that until it’s apart and you can check it, any number of things could be sketchy.
Hence, get a bible and read it until you can remember important bits.
if you’re getting blue smoke then don’t worry, it’s supposed to be that way. If you got white smoke then problems - bottom end seal failure etc…
if you can hear the rings rattle when you blip the throttle then you’re probably looking at a top end overhaul. Rebore, pistons, small ends etc…
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Post by badger69 on Jun 5, 2022 10:13:51 GMT 1
I've had two bikes now, where the previous owner had fitted new rings to worn out barrels. I don't get it. In fact the 2nd one also had new Jap pistons in it too. Both low on compression and measured worn out. Now rebored and rebuilt. Thanks for advice will check barrels for size when stripped. This is my first attempt at fixing my own bike. My brother was the machanic but got killed on his triumph 955 21 years ago! Thanks abunch will do. |
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Post by badger69 on Jun 5, 2022 10:14:45 GMT 1
I’m really surprised at this thread. Is this for real?? I would suggest buying a bible (Haynes manual) and read. It’s a really good source of knowledge and also explains a great deal about examining the top end. Changing rings - great idea but what if the bores are glazed?? Check the ring gap - how this is done and what it means Benefits of a rebore and hone New small ends / circlips While you’re in there clean the exhaust port Maybe consider contacting Mick for a mild tune How to check the head and barrel tops are flat So on and so forth Buena fortuna! |
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Post by badger69 on Jun 5, 2022 10:26:23 GMT 1
So, when you’re on a budget and really struggling but want the best your budget can cope with or, you’re just looking to sell it on then a re-ring is usually a really short term thing. The thing about top ends is that until it’s apart and you can check it, any number of things could be sketchy. Hence, get a bible and read it until you can remember important bits. if you’re getting blue smoke then don’t worry, it’s supposed to be that way. If you got white smoke then problems - bottom end seal failure etc… if you can hear the rings rattle when you blip the throttle then you’re probably looking at a top end overhaul. Rebore, pistons, small ends etc… Hi great advice. First thing I don't read . Only on here. And yes fixing it to sell on only. But has little compression this is not normal is it. I thought worn rings would make it smoke more than a 2 stroke should smoke is this not right. I've never fixed a bike on my own before that was my brothers specialty.
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Post by chrisg on Jun 5, 2022 19:13:17 GMT 1
Unfortunately worn rings dont cause excessive smoke on a 2 stroke. Try 2 compression tests. 1st dry, with wide open throttle, 2 d with about 5ml of 2t in the bores and again WOT.
what reading do you get?
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Post by zed1015 on Jun 5, 2022 20:33:33 GMT 1
I presume you are getting the bores honed before fitting the rings and that the piston/bore clearance is within tolerances?
If you haven't de-glazed the bores then fitting new rings is a waste of time.
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Post by JMW on Jun 5, 2022 20:45:59 GMT 1
One of the great things about the old RD forum from 10+ years ago was you could see where people were, town, city, county, country etc..
What this allowed for is people to say ‘you’re just up the road mate, I’ll come over one evening and help’
Collaboration and passing on of knowledge is vital if these eco-disasters are to keep gracing the roads…
Viva the wail of the nail!!!’
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Post by midlifecrisisrd on Jun 5, 2022 21:24:27 GMT 1
One of the great things about the old RD forum from 10+ years ago was you could see where people were, town, city, county, country etc.. What this allowed for is people to say ‘you’re just up the road mate, I’ll come over one evening and help’ Collaboration and passing on of knowledge is vital if these eco-disasters are to keep gracing the roads… Viva the wail of the nail!!!’ If you put your location in your profile you can see it when you click on someone's user name 👍 Steve |
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