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mine looked kind of like that, maybe a little better, i also couldnt feel grooves but could see the markings, hone my machinst guy hone it with a rigid hone and it looked nearly new after, you may be too for gone if you are feeling grooves though..........
edit: that kind of wear on a high hour thumper is pretty normal too btw.
edit: that kind of wear on a high hour thumper is pretty normal too btw.
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I was just wondering what causes this, and is it wise to go on with this cylinder, what are the risks... so on.
The thing is I don't have money for the replacement parts . Working and paying for college is hard enough as it is
.
Cheers, Tom
The thing is I don't have money for the replacement parts . Working and paying for college is hard enough as it is
.Cheers, Tom
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- Wisconsin, U.S.
What causes this is extreme engine forces causing the short wall , long stroke, large diameter piston to rock in the bore at high rpm thus causing scratches in the bore itself over time. the piston is alum, the wall nikasil plated steel and more high revving time/lack of piston changes causing rocking and scrathes, they start smalll and grow and grow and grow etc.
working and still paying for college, a house, two kids and a husaberg sucks just as bad, let me tell ya :lol:
Maybe i dont have enough thumper experience here to know,......it doesnt loook good but you could start with a local machine shop ridgid hone job (*not a bore/oversize at all*) which should cost 10-15 bucks then see where your at with the scratches. if there not bad then maybe you got something with this liner, but if there is a bunch of scratches left you can feel its not worth a new piston/rings IMO
markings vs scratches is the difference, markings that dont catch a nail will come out with a ridged hone......
working and still paying for college, a house, two kids and a husaberg sucks just as bad, let me tell ya :lol:
Maybe i dont have enough thumper experience here to know,......it doesnt loook good but you could start with a local machine shop ridgid hone job (*not a bore/oversize at all*) which should cost 10-15 bucks then see where your at with the scratches. if there not bad then maybe you got something with this liner, but if there is a bunch of scratches left you can feel its not worth a new piston/rings IMO
markings vs scratches is the difference, markings that dont catch a nail will come out with a ridged hone......
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Thanks guys.
The thing is these methods are not available here, so I'm down to a new cylinder or getting a steel one made( not sure about that either). Anyway the fact remains that I wouldnt have even noticed this was an issue if I hadn't took the engine apart to change a bearing in the gearbox. No smoking, easy start cold, good compression. So this brings me to another question: when would have this come to a point when it would create real problems??? And btw what would
those problems even be? I even measured the clearance for the compression ring and its. 0.40 mm and if I read correctly the tolerances are 0.001 X BORE (millimeters), so its its not worn hard. Im in short of money and really need to consider the cheapest option. Sorry if I asked stupid questions.
Cheers, Tom
The thing is these methods are not available here, so I'm down to a new cylinder or getting a steel one made( not sure about that either). Anyway the fact remains that I wouldnt have even noticed this was an issue if I hadn't took the engine apart to change a bearing in the gearbox. No smoking, easy start cold, good compression. So this brings me to another question: when would have this come to a point when it would create real problems??? And btw what would
those problems even be? I even measured the clearance for the compression ring and its. 0.40 mm and if I read correctly the tolerances are 0.001 X BORE (millimeters), so its its not worn hard. Im in short of money and really need to consider the cheapest option. Sorry if I asked stupid questions
.Cheers, Tom
- Joined
- Dec 2, 2011
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- north west, england
why do you need a new cylinder ?? it only looks like the plating is damaged . theres a place local to me called motrac racing he builds top quality race bikes and offers the service for replating cylinders iv had 2 husaberg cylinders plated and quite a few from other makes with fantastic results .
you can post him your cylinder and he will post it back a couple of weeks later when its back from plating ( they take 14 days or so ) .
and its only £145 plus return postage , then your cylinder is brand new and im quite certain you wont get a brand new cylinder for that kind of money.
i can give you his phone number if you want
cheers kris
you can post him your cylinder and he will post it back a couple of weeks later when its back from plating ( they take 14 days or so ) .
and its only £145 plus return postage , then your cylinder is brand new and im quite certain you wont get a brand new cylinder for that kind of money.
i can give you his phone number if you want
cheers kris
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You are right Kris, A new one is almost double that amount. Thank you for the info. I have been searching the web and it seems there is a company which sends the cylinders to austria to get them replated. Monday I will give them a call, lets see what are they offering, but I'm guessing it's not going to be cheap....only the salaries are "cheap" here )).
If it's more than 145 pounds I will definitely PM you for the phone number or email address.
Cheers, Tom
)).If it's more than 145 pounds I will definitely PM you for the phone number or email address.
Cheers, Tom
- Joined
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you dont have engine repair shops or machine shops where your from??
if it were me and being cheap, i would do a quick hone and new rings and call it a day :cheers:
worse thing that will happen, loss of compression or power from that compared to a newly plated cylinder.
are you putting in a new piston too?
if it were me and being cheap, i would do a quick hone and new rings and call it a day :cheers:
worse thing that will happen, loss of compression or power from that compared to a newly plated cylinder.
are you putting in a new piston too?
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my machine shop guy said he would do it but it wouldnt do anything due to it being nikasil,he also said a standerd ball hone or flex hone wouldnt do anything to it at all, he used a rigid hone and even to his surprise it put a nice refinished look to it again, like new but without removing material. the rigid hone is just like it sounds the grinding stones are rigidly presed into the side of the wall vs. having a relativly small amount of spring pressure against holding the stones against the wall.
i still think that under the circumstances,with money being an issue, it wouldnt hurt to have a hone of any kind done and see what it does, if it does nothing oh well you wasted 15 bucks, then send it out and spend the money for a replate. if it works you saved a bunch of cash. you maybe could even touch up the skirt markings on the piston with some fine grit sand paper,dont remove metal as much as possible just the high spots/marks.
obvoiusly, plateing and a new cylinder and piston and rings is better and is going to last longer and be like new.
i am only saying if money is an issue one could probably get by for a while, like you said, you didnt even tear it down for this reason and it wasnt causing as issue before, i would still do new rings with a hone though no matter what while your there.
i still think that under the circumstances,with money being an issue, it wouldnt hurt to have a hone of any kind done and see what it does, if it does nothing oh well you wasted 15 bucks, then send it out and spend the money for a replate. if it works you saved a bunch of cash. you maybe could even touch up the skirt markings on the piston with some fine grit sand paper,dont remove metal as much as possible just the high spots/marks.
obvoiusly, plateing and a new cylinder and piston and rings is better and is going to last longer and be like new.
i am only saying if money is an issue one could probably get by for a while, like you said, you didnt even tear it down for this reason and it wasnt causing as issue before, i would still do new rings with a hone though no matter what while your there.
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Update: Finally got around to speak with the shop which repairs Nikasil cylinders.
Prices are from 90 Euros up to 120 Euros. The guy said the prices vary between ccm's so mine being a 650, it is 120 Euros. They send it to Austria and you'll get it back within 3-4 weeks.
Cheers, Tom
Prices are from 90 Euros up to 120 Euros. The guy said the prices vary between ccm's so mine being a 650, it is 120 Euros. They send it to Austria and you'll get it back within 3-4 weeks.
Cheers, Tom
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The shop is here in Romania, but they ship the cylinders to Austria where they repair them.
Here is the website of the firm(altough I believe it is only in romanian):
www.offroadparts.ro
Cheers, Tom
Here is the website of the firm(altough I believe it is only in romanian):
www.offroadparts.ro
Cheers, Tom
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- Dec 2, 2011
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- north west, england
thats a great deal , its a big eye opener how much us british get ripped off hahaha everything seems to be cheaper some were else in the world.
cheers kris
cheers kris
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don't you see the best and worst of people on these sites hey............. :wink: :wink:
don't re-nikasil it just phukin hone it like you were told Taamas.
OK?
get a three legged hone and some brake fluid and do it for about 2 minutes. a minute in each direction.
can we have a photo of the thrust faces of the piston please?
thank you
regards
Taffy
don't re-nikasil it just phukin hone it like you were told Taamas.
OK?
get a three legged hone and some brake fluid and do it for about 2 minutes. a minute in each direction.
can we have a photo of the thrust faces of the piston please?
thank you
regards
Taffy
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