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Post by oldbritguy on Apr 4, 2020 10:29:44 GMT 1
Hi All Probably covered before but has anyone any recommendations for places doing cylinder re-sleeving at the north end of the Nation? PJME seem to have a good rep but 300 miles away from me (Glasgow) 350LC on +2 and quite badly worn at bottom of bore. Looks as though there has been PV pistons in at some point leaving big ridges at bottom. Pistons are slapping about at the bottom of the stroke just at the ports  . I'll get some pics up later Anyhow, too far gone for another rebore so looking a re-sleeving or finding a decent set of used cylinders. Thoughts please Cheers John |
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Post by stusco on Apr 4, 2020 10:33:22 GMT 1
Why not just post them to PJME they have rebored mine before no problem
whenever anyone asks about resleeving or reboring its always grampians or pjme that comes up
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Post by oldbritguy on Apr 4, 2020 11:22:55 GMT 1
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Post by tony2stroke on Apr 4, 2020 11:37:22 GMT 1
Good God! I have never seen wear like that before, brings a hole new dimension to the tang debate!!!!
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Post by midlifecrisisrd on Apr 4, 2020 11:43:54 GMT 1
Hi All Probably covered before but has anyone any recommendations for places doing cylinder re-sleeving at the north end of the Nation? PJME seem to have a good rep but 300 miles away from me (Glasgow) 350LC on +2 and quite badly worn at bottom of bore. Looks as though there has been PV pistons in at some point leaving big ridges at bottom. Pistons are slapping about at the bottom of the stroke just at the ports . I'll get some pics up later Anyhow, too far gone for another rebore so looking a re-sleeving or finding a decent set of used cylinders. Thoughts please Cheers John Asked my parts guy and he has an early pair on standard bore but need bored and one ex stud is oversized and has a crack at the stud so needs welded and retapped Brace yourself- £550 😱 Steve |
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Post by dusty350 on Apr 4, 2020 11:47:45 GMT 1
Hi John Post them to Pjme mate. Wherever you go, it's post in and out only at the mo - most counters are closed to the public. I've had a pair of Lc cylinders that had been relined by Paul at Pj's before I owned them. They were an excellent job. He does/has done loads of them - numbering in the hundreds of pairs, so you are in safe hands !  Dusty  |
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Post by muttsnuts on Apr 4, 2020 12:39:10 GMT 1
John, I've PM'd you, I know smoebody who has a set of relined stock barrels with no repairs he is going to sell
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Post by oldbritguy on Apr 4, 2020 15:27:48 GMT 1
Hi All Probably covered before but has anyone any recommendations for places doing cylinder re-sleeving at the north end of the Nation? PJME seem to have a good rep but 300 miles away from me (Glasgow) 350LC on +2 and quite badly worn at bottom of bore. Looks as though there has been PV pistons in at some point leaving big ridges at bottom. Pistons are slapping about at the bottom of the stroke just at the ports . I'll get some pics up later Anyhow, too far gone for another rebore so looking a re-sleeving or finding a decent set of used cylinders. Thoughts please Cheers John Asked my parts guy and he has an early pair on standard bore but need bored and one ex stud is oversized and has a crack at the stud so needs welded and retapped Brace yourself- £550 😱 Steve Thanks Steve There is still another couple of hundred quid on that to go yet which is probably more expensive than getting my own re-lined. I will bear this in mind though and if I get stuck I can get in touch Dave W might have a set in the pipeline plus I will give PJME a call on Monday for some prices Cheers again John |
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Post by midlifecrisisrd on Apr 4, 2020 15:30:11 GMT 1
I thought that would be the direction you went in
Think that money will get yours relined including pistons
Steve
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Post by oldbritguy on Apr 4, 2020 15:32:08 GMT 1
Hi John Post them to Pjme mate. Wherever you go, it's post in and out only at the mo - most counters are closed to the public. I've had a pair of Lc cylinders that had been relined by Paul at Pj's before I owned them. They were an excellent job. He does/has done loads of them - numbering in the hundreds of pairs, so you are in safe hands ! Dusty Cheers Dusty I'll give them a call on Monday for some prices. They seem a pretty good outfit and from your crank thread come well recommended too - which is a bonus A couple of irons in the fire regarding getting this sorted but will let y'all know once I am sorted and got the rebuild thread moving. John |
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Post by bare on Apr 8, 2020 3:42:19 GMT 1
Resleeving It's a Bodge repair on a 2 stroke . Despite Fanboy Bleats to the contrary.
For a variety of reasons to do with Messed heat transfer (Yama cyls were eutectic castings..Sleeves are simply stuffed in)
Also reduced transfer portings ..boring the ali casting to fit the sleeve tube reduces their area.
Avoid this..Unless !? patching the thing for a quick resale or Pure Shopping usages.
There are 2 choices;
1) buy replacement cyls
2) have your cyls Nikasil'd. which is an Excellent repair.
Not free though
G'luck
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Post by beardy on Apr 8, 2020 8:22:11 GMT 1
Can you get LC cylinders Nikasil’d?
Without googling I thought not?
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Post by chippy348 on Apr 8, 2020 14:27:21 GMT 1
Resleeving It's a Bodge repair on a 2 stroke . Despite Fanboy Bleats to the contrary. For a variety of reasons to do with Messed heat transfer (Yama cyls were eutectic castings..Sleeves are simply stuffed in) Also reduced transfer portings ..boring the ali casting to fit the sleeve tube reduces their area. Avoid this..Unless !? patching the thing for a quick resale or Pure Shopping usages. Totally false information you are giving Re the 350lc Cylinders, but keep sprouting it without any actual knowledge of how the job is done. |
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Post by 4l04ever on Apr 8, 2020 14:51:13 GMT 1
I have seen a bike make 60hp on a low reading dyno with relined cylinders taken out to 68mm, so with reduced transfer area was still able to make good power...
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Post by muttsnuts on Apr 8, 2020 18:46:05 GMT 1
Rob, my 421 LC has been relined with very big liners and the transfer area is reduced, and that as I posted a while back is knocking 65+bhp and 40ftlbs of torque, all low down in the revs as designed, so no issues with relining.
I've had lots done and all have done the same or more than stock LC's, so nothing wrong with relining, as Paul (Chippy348) says, false info, if anybody wants some dyno charts, feel free to ask as I've have lots with relined runs
its ok saying "nikasil", but try finding the correct pistons to fit with the correct rings to run in nikasil, they aren't cheap or readily available in certain sizes for the LC
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Post by tony2stroke on Apr 8, 2020 19:03:44 GMT 1
I have seen a post (can't find it now) showing a re-lined cylinder that had slipped round, liner was blocking ports, needless to say it was fek'd, after seeing that I would not like to have re-lined cylinders.
I have a feeling that it may have been a pair with DT175 liners.
In fact I went to great expense to buy a standard bore and ported pair of barrels myself, I don't think it was really that expensive when you consider the cost of re-sleeving, and in my case buying a pair to get re-lined, it was a no brainer to buy standard pair, personally I would look for a standard set, they do come around on ebay, you would be able to sell your damaged set to someone that would be happy with re-lining if like me and Bare that bothers you.
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Post by oldbritguy on Apr 8, 2020 19:58:32 GMT 1
Lots of interesting points here and good to see a healthy debate on the pros and cons of both options.
As for my own plight the bores are presently at +2mm and one in particular is totally shag#ed at the bottom of the bore. Must be at least another mm out plus badly ovaled. I am not that familiar with the nikasil plating process but I think these cylinders are beyond that. Plus the issue of finding pistons once they manage to get bored out to a proper true round size. The liner would be wafer thin after that.
Although there have been a few negative views on re lining there are as many positives being put forward as well.
My preference would be picking up a pair of standard(ish) cylinders, hopefully not needing tons of work but they are few and far between. For the moment I am going down the re lining route (sent them off today actually) which will hopefully work out fine. I am not a thrash merchant any more so hopefully none of the issues brought up will present themselves when I am out and about.
I will of course keep y’all posted on how things go and if anyone has a good set of 350 cylinders that you don’t need any more and are selling cheap 😬 then feel free to give me a shout.
John
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Post by Tobyjugs on Apr 8, 2020 21:38:39 GMT 1
My bike is also running re-lined YPVS barrels with 68 mm pistons. It's not possible to use power valves but it did make 71pk on the dyno. Its been very reliable and no cooling problems.
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Post by steeley on Apr 9, 2020 5:23:52 GMT 1
I know a chap who put 250 bultaco liners in a 350lc for one of his customers . This was in the mid late 80's .He said he fitted rd400 con rods to the crank . He did mention the transfer area was reduced and said the owner enjoyed showing larger bike owners up with his 350lc.
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