January 14th, 2017, 06:54 PM | #1 |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
MOTM - Sep '15
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Exhaust cracked at weld
should I just re-weld it? its my race bike? Its the area p exhaust i got this past summer, i did crash on the right side, but not sure if the crack is because of the crash, as you can see where the crack is.
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January 14th, 2017, 07:34 PM | #2 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School Last futzed with by csmith12; January 15th, 2017 at 09:18 AM. |
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January 14th, 2017, 07:54 PM | #3 |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
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I would remove it from the bike and take it to a welding shop that has TIG equipment and a skilful operator.
Tungsten inert gas (TIG) welding, is a manual welding process that is especially useful for welding thin materials. If you try any welding on the bike, disconnect the battery previously. It could be from the crash or from fatigue of the material, if the set up allows cycling bending stress on that welding. https://en.m.wikipedia.org/wiki/Fatigue_(material)
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January 14th, 2017, 07:56 PM | #4 |
Certifiable nontundrum
Name: Harper
Location: NC Milkshake stand
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January 14th, 2017, 08:40 PM | #5 |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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I would send Area P the photo and see what they have to say about it. It may be a common issue that they will take care of - or at least want to know about.
I agree with Motofool - remove it and take it to a good welder that is familiar with TIG welding stainless. |
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January 15th, 2017, 06:24 AM | #6 |
ninjette.org member
Name: AJK
Location: Maryland
Join Date: Jul 2015 Motorcycle(s): TOOOOOO MANY!! Posts: 87
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Whoa!bad weld job. Only surface coverage(filler just laying on top of the joint) and no root fusion in order to crack like that. I'd have a word with the manufacture if its only a year old.Ive sommersaulted bikes and bent up exhaust into pretzels and welds never break,the rest of the pipe bends.
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January 15th, 2017, 07:28 AM | #7 |
ninjette.org member
Name: Jim
Location: Utah
Join Date: Apr 2016 Motorcycle(s): Ninja250-3x; CBR600 & R6 (track bikes); lots of dirt stuff Posts: 25
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Awful weld
Agreed, ugly weld with NO penetration. Yuk...
That's one to take back to the dealer. If they won't help, try this. Pull the plastic so a welder can get to it. Take the bike to the weld shop and have it tack welded in several spots. Return home, pull the pipes off and return them to the weld shop. They will re-weld the joint; then reinstall and go. This is the cheapest way to do it; and you'll learn something new. If you lived close to me, I'd do it for you. Gratis... Being it's your race bike, get it fixed now. I tech a lot at the Miller Track, and wouldn't pass it for racing, but OK for practice. You don't want to be running around trying to find a welder on the weekend that you paid a lot of money to do something fun. Now, go get you hands dirty, Cheers, PS: If this was your main ride, you could go to the auto-parts store and get some exhaust pipe wrap. It will keep you on the road until a time window opens for a proper repair. Last futzed with by NinJim; January 15th, 2017 at 07:39 AM. Reason: grammar |
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January 15th, 2017, 07:38 AM | #8 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
Join Date: Jul 2016 Motorcycle(s): Ninja 250 Posts: A lot.
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As a manufacturer of motorcycle parts myself, I agree that the folks who made this pipe should have the chance to see what happened. It's great to get positive feedback from customers, but knowing about problems is more important, and if I were the maker, I would repair it free, to thank you for pointing out the problem.
Failing a free repair, I would follow NinJim's advice and not take it off and take it to a welder, because it would be very easy to get it out of position, and even a small error could affect the pipe's fit. I would tack weld it in place, and then remove it to complete the weld. Last futzed with by Triple Jim; January 15th, 2017 at 12:40 PM. |
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January 15th, 2017, 10:25 AM | #9 |
Area P
Name: Kerry
Location: SoCal & South Florida
Join Date: Dec 2008 Motorcycle(s): Too many to list Posts: 439
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Chris - We'll be happy to take a look at it for you and take care of it. Obviously the crash can contribute to it cracking along with many other possibilities. Regardless, we should be able to repair it for you and get you back on the track. I see you e-mailed us as well today. We'll contact you with return information.
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January 15th, 2017, 10:45 AM | #10 |
ninjette.org member
Name: ar
Location: esco
Join Date: Apr 2016 Motorcycle(s): ex250 Posts: 77
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How many more laps have you done after the crash on the right side ? Did you hear the exhaust leak before the h/p went soft ?
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January 15th, 2017, 11:00 AM | #11 |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
MOTM - Sep '15
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I crash during qualifying round 1. Didn't notice anything till I was changing the oil last night when I had the bike running and I could feel the air coming from the crack. Probably done at least 50 laps since the crash.
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January 15th, 2017, 12:26 PM | #12 | |
Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot.
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Quote:
I guess I would make some marks on it with a Sharpie to make sure it's not rotated out of position when welded. I think that's all it would take as it would be easy to get it positioned forward/backward by just closing the crack. |
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January 15th, 2017, 08:33 PM | #13 |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
MOTM - Sep '15
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This not an issue from AreaP just so everyone is clear, I bought a pipe from them and installed it myself with a few fabrications, I just need ideas on how to fix it. I'm not familiar with welding and welds. But I have a few friends local where that is their profession and have asked them about it too.
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1 out of 1 members found this post helpful. |
January 16th, 2017, 09:29 AM | #14 |
The Corner Whisperer
Name: Chris (aka Reactor)
Location: Northern KY
Join Date: May 2011 Motorcycle(s): 2010 250 (track), 1992 250, 2006 R6 (street/track), 2008 R6 (track) Posts: Too much.
MOTY 2015, MOTM - Nov '12, Nov '13
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Can you post a pic of your complete system as best you can? If your mounting configuration may have factored in the failure, then we all can learn and be on the lookout for it in the future.
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Goal: Shake A Million Hands | Look through the corners | Track Day Prep | Closest track? | The Mid-Ohio School |
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January 16th, 2017, 10:19 AM | #15 | |
ninjette.org member
Name: AJK
Location: Maryland
Join Date: Jul 2015 Motorcycle(s): TOOOOOO MANY!! Posts: 87
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Quote:
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January 16th, 2017, 04:04 PM | #16 |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
MOTM - Sep '15
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best on i have right now
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January 16th, 2017, 07:57 PM | #17 | |
ninjette.org member
Name: Jim
Location: Utah
Join Date: Apr 2016 Motorcycle(s): Ninja250-3x; CBR600 & R6 (track bikes); lots of dirt stuff Posts: 25
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Welding thin walled tube
Quote:
Thin walled tube, like this exhaust pipe, takes a little prep to keep it aligned so it will fit correctly along its intended path. If you were to remove it, then weld it in a continuous weld using marks like a sharpie, it would not be close to fitting back on the bike. The warping of thin steel is quite pronounced. All tube assemblies are cut to close tolerances, then held in alignment using robust hold-down jigs. They are then tacked on all sides. The final welding is done using a "stitching" technique, which means you weld for half an inch then go to the other side and do the same. By tack welding it while on the bike, you are using the most effective jig, the bike itself. Once it's tack welded in four or so spots, it will not lose it alignment as the rest of the weld is completed. If you are interested for more in depth info, go to YouTube and search "welding tube clusters". It's aviation site with good info. I hope this helps. It takes longer to explain than it does to complete the weld. Cheers, NinJim Last futzed with by NinJim; January 16th, 2017 at 08:02 PM. Reason: grammar |
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