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Post by billbott on Dec 31, 2023 9:54:21 GMT 1
Put my 250 on the ramp last night and tried fitting the Delkevic exhausts I got for Christmas. I fastened the manifold / collars up first but there was no way I could fit the exhausts into them when they were on the bike? They are a really tight fit and take some wiggling to get them together without being fitted to the bike, as the inner and outer sleeve are the same length meaning you have to line them up perfectly to get them together which is impossible when on the bike. So I had to bolt them on the bike with the collars fitted - when I took them off leaving the collars bolted on it was again a right bloody struggle and absolute no way I could get them back on again! Anyone else managed ok? Looks to me that I will have to shorten either the inner or outer sleeve so that the one protruding will help guide them on and locate with the other? It’s a tight fit whereas on my Gibsons it slides in easily They came in the box with them fitted together and took some effort to pull apart!  |
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red998
Drag-strip hero
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Post by red998 on Dec 31, 2023 10:12:02 GMT 1
If I am reading this correctly could you not try and get someone with an exhaust tube expander to try and open the header part of the exhaust a fraction to help you ease it onto the manifold? I have done this before when fitting a car exhaust in order to allow one tube to slip over the other, it worked fine with no leaks.
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Post by billbott on Dec 31, 2023 10:18:36 GMT 1
If I am reading this correctly could you not try and get someone with an exhaust tube expander to try and open the header part of the exhaust a fraction to help you ease it onto the manifold? I have done this before when fitting a car exhaust in order to allow one tube to slip over the other, it worked fine with no leaks. The manifold / collar is a double tube which locates in the bore of the exhaust and the O/D too so modifying the exhaust itself would make it worse. I’ve added a photo to the first post to try to explain 😊 |
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Post by dusty350 on Dec 31, 2023 10:23:05 GMT 1
The other thing I dont like about these is the rear mount bolts on the outside of the footrest hanger. Looks wrong to me  |
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Post by lcmarky on Dec 31, 2023 11:03:17 GMT 1
This is not the first post regarding ill fitting Delkevic pipes..
Send them back and speak to Norbo/Mutts about a better quality set perhaps?
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Post by scootjockey on Dec 31, 2023 11:15:49 GMT 1
Sounds to me the build tolerances are a little on the exact side ? Resulting in building the complete exhausts up, then needing 3 pairs of hands to fit them.. Could you not put the headers/collars in the freezer for an hour or so before fitting the pipes to them ? Then break your fingers putting the retainer springs on just like Yoshimura expect you to do ?
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Post by lcmarky on Dec 31, 2023 11:28:33 GMT 1
Put my 250 on the ramp last night and tried fitting the Delkevic exhausts I got for Christmas. I fastened the manifold / collars up first but there was no way I could fit the exhausts into them when they were on the bike? They are a really tight fit and take some wiggling to get them together without being fitted to the bike, as the inner and outer sleeve are the same length meaning you have to line them up perfectly to get them together which is impossible when on the bike. So I had to bolt them on the bike with the collars fitted - when I took them off leaving the collars bolted on it was again a right bloody struggle and absolute no way I could get them back on again! Anyone else managed ok? Looks to me that I will have to shorten either the inner or outer sleeve so that the one protruding will help guide them on and locate with the other? It’s a tight fit whereas on my Gibsons it slides in easily They came in the box with them fitted together and took some effort to pull apart! Surely you only need the inner diameter? Have a look at my post where I just made a new pair of mounts for my Nikkon pipes - it's right at the end to save you scrolling through. rdlccrazy.proboards.com/thread/57559/350-400-hybrid-slow-burner?page=13Just machine off the outer diameter?? |
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Post by midlifecrisisrd on Dec 31, 2023 11:34:38 GMT 1
I've had this with gibsons and JL retros
First fitting needs done with the collars already fitted
After they've been on the bike, heated up and the bike used they tend too "align" better
The thing to remember is the tighter the flanges the less oil seepage there will be
Steve
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Post by billbott on Dec 31, 2023 13:05:22 GMT 1
Well, after a right struggle I’ve got them on. Where the two mounting lugs are welded on, there is a 3mm step when they are fitted. As they are tightened this causes them to distort so absolutely no way the header will slide in. So I packed out underneath the lugs so as the collar touches the gasket in the barrel, the lugs bottom out and prevents them distorting.. still a struggle but it’s at least possible to get them in. Next issue, the mounts are half a hole out- both sides!  |
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Post by billbott on Dec 31, 2023 13:07:24 GMT 1
I've had this with gibsons and JL retros First fitting needs done with the collars already fitted After they've been on the bike, heated up and the bike used they tend too "align" better The thing to remember is the tighter the flanges the less oil seepage there will be Steve I’m hoping they will be easier to get on and off once they have been used Steve, time will tell. |
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Post by billbott on Dec 31, 2023 13:08:49 GMT 1
Put my 250 on the ramp last night and tried fitting the Delkevic exhausts I got for Christmas. I fastened the manifold / collars up first but there was no way I could fit the exhausts into them when they were on the bike? They are a really tight fit and take some wiggling to get them together without being fitted to the bike, as the inner and outer sleeve are the same length meaning you have to line them up perfectly to get them together which is impossible when on the bike. So I had to bolt them on the bike with the collars fitted - when I took them off leaving the collars bolted on it was again a right bloody struggle and absolute no way I could get them back on again! Anyone else managed ok? Looks to me that I will have to shorten either the inner or outer sleeve so that the one protruding will help guide them on and locate with the other? It’s a tight fit whereas on my Gibsons it slides in easily They came in the box with them fitted together and took some effort to pull apart! Surely you only need the inner diameter? Have a look at my post where I just made a new pair of mounts for my Nikkon pipes - it's right at the end to save you scrolling through. rdlccrazy.proboards.com/thread/57559/350-400-hybrid-slow-burner?page=13Just machine off the outer diameter?? Thought about this, or even just halfway so it only needs to locate on the inner initially then once lined up it’ll slide up….. |
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Post by billbott on Dec 31, 2023 13:18:56 GMT 1
So do I: File out the holes leaving a thin wall toward the front of the bike. Cut off the tabs and make some out os stainless steel plate. Or send them back. As soon as I get the file out the warranty is gone, but if I force the bolt through the exhausts May crack on a weld as they are strained.  |
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Post by midlifecrisisrd on Dec 31, 2023 13:25:58 GMT 1
Take the springs off and let them slip forward a little
Steve
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Post by liffy16 on Dec 31, 2023 14:14:42 GMT 1
Perhaps 'made in England 'still means something?not that it helps much in this case ☹
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Post by beardy on Dec 31, 2023 14:20:45 GMT 1
If you’re not in a hurry I’d send them back with pictures. Or at least speak to them. Maybe yours were a Friday afternoon set.
I had to cut the hangers of my mid range pipes and re weld the brackets to fit my LC. Not because they were poorly made. But the mods on my bike forced me down that route. They were mild steel so easy to do and no chrome to ruin. So I’m not adverse to modifying if necessary. But you’ve bought pipes to fit a standard bike and they don’t.
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Post by billbott on Dec 31, 2023 14:59:19 GMT 1
Take the springs off and let them slip forward a little Steve Tried that Steve, still not enough. And if you take them out completely there’s no chance of getting them back in, I tried…. |
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Post by billbott on Dec 31, 2023 15:05:30 GMT 1
They are on after some filing……     Not happy with the rear bracket being nowhere near central though… I’m not averse to modifying stuff but for a set of made to fit exhausts I’m not overly impressed At least now I can take them on and off without removing the header stub though Once I’m over this flu, I will modify the rear bracket so it’s in the right place and also so it mounts from the rear, I have a plan…. |
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Post by billbott on Dec 31, 2023 15:09:43 GMT 1
Oh and the monkeys @rse is now black and drying in the airing cupboard  |
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Post by midlifecrisisrd on Dec 31, 2023 15:11:05 GMT 1
A 2nd washer under the nut once you've done the mod will also help
On my 385 I mounted the pipes on the outside of the Tarrozzis rather than space the plates out to clear the rgv arm
Steve
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Post by billbott on Dec 31, 2023 15:18:40 GMT 1
Think…
I’m gonna bend the rear tab to 90 degrees, then bolt a stainless steel L bracket to the tab and onto the hanger.
Probably do it next week so will update to explain …..
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Post by billbott on Dec 31, 2023 16:13:18 GMT 1
Just got this picture off Facebook You can see what I mean about the gap under the mounting lugs, this causes distortion when tightened so the pipes will only fit when the mounting lugs are loosened I thought the whole point of having separate pieces was for ease of exhaust removal, may as well have one piece exhausts  |
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Post by beardy on Dec 31, 2023 16:39:03 GMT 1
I’m surprised they distort. Mine also have a gap but I think if I kept tightening I’d strip a bolt or snap a stud.  |
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Post by billbott on Dec 31, 2023 16:53:33 GMT 1
I’m surprised they distort. Mine also have a gap but I think if I kept tightening I’d strip a bolt or snap a stud. My Gibsons have a gap too and are fine. Have read a couple of FB posts that other people could only fit with the stubs already on the end of the pipes… |
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Post by midlifecrisisrd on Dec 31, 2023 17:17:49 GMT 1
After the other fellas issues with the gap and distortion I was going to make a plate to go behind the flange to fill the gap
I'll deal with them once I've actually built the bike 🤣
Steve
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red998
Drag-strip hero
Posts: 211
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Post by red998 on Dec 31, 2023 17:42:51 GMT 1
If I am reading this correctly could you not try and get someone with an exhaust tube expander to try and open the header part of the exhaust a fraction to help you ease it onto the manifold? I have done this before when fitting a car exhaust in order to allow one tube to slip over the other, it worked fine with no leaks. Ok, yes I now understand and that looks like a tricky situation. I have Jim Lomas pipes on my 250LC and they use a single wall tube on the manifold stubb that links to the main exhaust.
Clearly that's going to be a task all the time you have to fit and remove the pipes, I have no idea what would be a compromise as the interfefrence fit of these pipes is just so close. Good luck in finding a solution.
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Post by lcmarky on Dec 31, 2023 19:41:46 GMT 1
To be quite honest they look absolutely shocking & quite clearly do not fit properly. I would 100% have them back and get a better made set from elsewhere.
Those mount holes are 1/2 their diameter out of alignment - that isn't even close in engineering terms & is wholly unacceptable.
I had a set of JL pipes on my RD500 and they fitted perfectly, so it's just shite workmanship and zero quality control.
Delkevic should be embarrassed if they see this thread!
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Post by lcmarky on Dec 31, 2023 19:47:51 GMT 1
From the Delkevic website just in case you need to remind them:
We are the leading manufactures and suppliers of motorcycle road and race exhaust systems throughout the motorcycle world. With offices in the USA, UK, Australia, and Japan we have dedicated sales teams providing excellent customer service to all kinds of motorcycle exhaust enquiries. Our staff includes active enthusiasts with a racing or motor sports background; therefore we understand your needs and are able to advise you on the best solution. Our products are designed and developed to fit straight onto the motorcycle without need for remapping or carburation modifications. Delkevic motorcycle exhausts are handcrafted from the highest quality materials to enhance your motorcycle in both performance and looks. We guarantee to improve your riding experience at an unbeatable price. Feel free to contact us whether you require replacement headers, complete exhaust, de-cat pipes, carbon slip on or any other silencer, we are here to help!
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Post by lcmarky on Dec 31, 2023 19:53:51 GMT 1
FWIW my rear mount sits on the inside of the hanger - would look less shite if you couldn't see it perhaps.
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Post by billbott on Dec 31, 2023 23:52:35 GMT 1
To be quite honest they look absolutely shocking & quite clearly do not fit properly. I would 100% have them back and get a better made set from elsewhere. Those mount holes are 1/2 their diameter out of alignment - that isn't even close in engineering terms & is wholly unacceptable. I had a set of JL pipes on my RD500 and they fitted perfectly, so it's just shite workmanship and zero quality control. Delkevic should be embarrassed if they see this thread! I bought them based on price to be honest. Now they are on they look ok except for the hanger. I have emailed them with some pictures, but because I have slotted out the mounting holes I’m probably on a hiding to nothing? My Gibson pipes were made for a powervalve but fitted my 4L0 better than these. |
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Post by donkeychomp on Dec 31, 2023 23:55:52 GMT 1
They aren't the best looking things are they? The welds look poor too, but the fact that they don't even fit is appalling. Send 'em back I say. If I needed some proven pipes I'd buy some Alonze ones off of Mutts. And what's with the red paint??
Alex
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