Blown Blur motor?

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bluelghtning
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Blown Blur motor?

Post by bluelghtning »

So anyone ever hear of a blown Blur motor? Specifically one with less then 4k miles! :cry:

Guess I might be the first. :x I actually wasn't riding it when it blew. My wife and I were out of town and I opted to let my best friend of 17 years borrow the Blur while I was out of town. He's actually the one that got me interested in riding many many years ago. Him and his wife are raising two great kids and he hasn't owned a motorcycle in a few years so I usually let him borrow something while I'm out of town not using it. It always makes him happy and he's done many things for me in the past also. He's the only one I ever trust to borrow my bikes and he has several times in the past without incident. Either way, I doubt he did anything out of the ordinary. It was a bone stock Blur with 3900 BDU's and for what ever reason, it must have just been a ticking time bomb ready to go. I guess it could have easily have been me or anyone else that was riding it when it blew. He was just riding it back and forth to work and on this particular day, he said he was riding it and it suddenly made a bunch of noise and lost power. At first he was thinking it was the belt that had went just from the way it acted, but when he stopped and saw oil everywhere, he knew the worst had happened.

So tonight, we started to tear into it to see what we could find. Well, we found one nice big hole at the back of the motor. I don't know internals of motors that well, but it looks like the rod went through the side of the block! The bits of metal pieces everywhere and also some decent chunks.


Looking down, you can see the tiny bits of metal everywhere and a big hole in the back that shouldn't be there.
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I'm still trying to figure out what that bolt goes to and what it was holding in place?
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My friend keeps saying he will come through and make this right, but I really don't think this falls on him if he wasn't abusing it. The last thing I wanted to have happen was for him to have to fix my scooter because of a mechanical failure that could have easily happened to me. If you don't remember, I actually had the Blur up for sale. I had no indications that anything at all was wrong with it. It ran well and it has absolutely no mods done to it. The oil had been changed regularly, and was full. And like I said, it was less then 4k miles on the scooter.

So now trying to find the best option for both of us. He was actually really digging the Blur. In fact, he was on his way to go look at some other scooters when it blew as he was having so much fun on mine. But now he's got a terrible taste for scooters and can't believe such a low mileage motor let go.

He's already called around to price new motors and they are $$$$ (expensive). Way too much to even be an economical decision. Does the Blur share a motor with anything else? I would be fine with finding a good used motor to put in there.

What about parting it out? I have a very clean Blur with no cosmetic damage and a clean title? Just not sure there is much of a market for the rest of the bike?

The best option would probably be finding someone that totals their Blur, but the motor is still good and I can pick it up on cheap and transfer the motor from it to mine. Maybe someone wants a project Blur they can put their own motor in? Maybe the 200 Blur motor! :D

In the end, I really don't plan on keeping the Blur. I really enjoyed the scooter, but my commute is too far now to make the 150 economical. Either I'll fix it and make someone a nice scooter to enjoy, or sell it for parts or whole.


Ugh! I just can't believe this happened. This really sucks!!!!
Last edited by bluelghtning on Mon Jul 13, 2009 2:58 pm, edited 1 time in total.
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Lostmycage
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Post by Lostmycage »

Wow :wtf:

I'm not really sure what I'm looking at there, but something isn't right at all. I've heard of Blurs' cranks failing, or more precisely, the PGO Gmax's early engines. I've even seen a few around here have theirs fail, but I've not heard of them exploding and sending out shrapnel like that. I'm really glad your friend is OK.
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Post by bluelghtning »

Yeah, I need to dig in further, but the first picture gives you an idea of where this is.

Most of this is hidden under the air filter snorkel. So this is the very back or I guess bottom of the motor.
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Erlkonig
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Post by Erlkonig »

never heard of any case like this .

if crankshaft failed, the engine just went down and dead.

Blowing engine needs some high power stuff like I heard someone add

laugh gas to boost engine power or something like "nitro" fuel.

I knew turbine blade could drive through the jet engine body because it's

high rpm but blur is recip- engine low output low rpm , if something in

engine came loose where it got the power to crack the engine and case?

Or the kid might hit something on the road and cracked the engine case.



Sorry for your blur
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Post by bluelghtning »

Just for reference and not that it really matters, but my friend is 6 years older then me which puts him about 40 years old. He's definitely responsible and like I said, he we'll make this good for me, but either way, I feel bad about the whole experience. Heck, I would have felt bad had I sold the Blur and it blew up on the new owner. I would never want that to happen to anyone.

As I get time, I'm going to to dig into the motor more and figure out what let loose.
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Post by Irishrover »

That's bad luck bluelghtning, pity you weren't this side of the pond as there is a Gmax 125 on ebay that was stolen and trashed with a low mileage engine for £200. I thought the Taiwan made scoots were solid this is worrying. Hope you get it fixed at a reasonable cost. Could have happened to anyone.
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Post by fs8gbe »

ah man that sucks. i think i would definitely be writing to genuine to atleast help with making this right. warranty or no warranty that is definitely not cool for the motor to pop like that at such a low mileage. i've got close to 5000km on the bike now and still no troubles so it is definitely a one off!

even still, sorry to hear. if you decide to part it out, and the tires are in good shape, i might be willing to buy them from you.
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Post by charlie55 »

Took a closer look tonite, and I'll retract that hypothesis about that bolt being a part of the motor mount. I'm stumped.
Last edited by charlie55 on Mon Jul 13, 2009 11:44 pm, edited 1 time in total.
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Post by Erlkonig »

write a complaint letter with photo to [email protected] to see

what they response. English is ok, they should read or I can help you

translate into local language.



If you got no response from them tell me, l will post the blown engine

picture in Taiwan web site.
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Post by Irishrover »

I would agree with what you suggest Erlkonig, I would have thought that PGO's research and development team would like to learn from this at least.
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Post by bluelghtning »

Thanks guys, I've forwarded the letter I sent to Genuine also to PGO.
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Post by KCScooterDude »

You are the second owner, right? I would suspect the first owner. These motors are pretty bulletproof. It would take a lot of abuse over time to weaken the case to that point. I've only heard of Buddy motors blowing up when run with no oil. You are right, probably only a matter of time before it blew up. Your friend won the lottery on that one.
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Post by bluelghtning »

KCScooterDude wrote:You are the second owner, right? I would suspect the first owner. These motors are pretty bulletproof. It would take a lot of abuse over time to weaken the case to that point. I've only heard of Buddy motors blowing up when run with no oil. You are right, probably only a matter of time before it blew up. Your friend won the lottery on that one.
I doubt the first owner had anything to do with it. If you remember, I had bought 2 Blurs, one with 700 miles, one with 1200. They belonged to a husband & wife. Both had had their first 600 mile service performed by the scooter store in Norcross, GA and were like new when I bought them. My brother bought the other Blur from me when it had about 1500 miles. He actually just sold his this past weekend.

And honestly, even 3900 BDU's on my blur which probably is closer to an actual 2500 miles which really is not that much. These motors have a reputation of being bullet proof and I'm definitely not a rider that abuses my bikes. I've owned 40+ motorcycles over the past 18 years and have never had one fail with this low of mileage on it.

The motor on my blur felt like it had just finally broken in around 2k BDU's and was running better then ever. I'm really convinced there was some sort of casting or engine defect, but we'll see.
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Post by jrsjr »

This is just an educated guess, but I'm guessing con rod failure. It probably snapped or otherwise went haywire and punched a hole in your case while the motor was still spinning. The bolt, I'm guessing, is one of the bolts that (used to) hold the cases together. It looks like the rod hit the case right where the case bolt inserts and actually forced the case halves apart.

That's a gnarly end to a decent motor. If it's any comfort, there is no way your buddy did anything to cause that. In my experience, the causes of what (I suspect) happened are 1) Defective Part, 2) Overrevveing the Motor, 3) Increasing the Compression. This is a scooter with a CVT (no clutch), so you can pretty much rule out #2 unless your buddy put it up on the centerstand and revved it until it blew. The motor was stock, so you can rule out #3. That leaves #1, a defective part or parts.

Please post photos when you split the cases so we can see what really happened.

Sorry about the demise of your Blur's motor.
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Post by Lostmycage »

jrsjr wrote:This is just an educated guess, but I'm guessing con rod failure. It probably snapped or otherwise went haywire and punched a hole in your case while the motor was still spinning. The bolt, I'm guessing, is one of the bolts that (used to) hold the cases together. It looks like the rod hit the case right where the case bolt inserts and actually forced the case halves apart.

That's a gnarly end to a decent motor. If it's any comfort, there is no way your buddy did anything to cause that. In my experience, the causes of what (I suspect) happened are 1) Defective Part, 2) Overrevveing the Motor, 3) Increasing the Compression. This is a scooter with a CVT (no clutch), so you can pretty much rule out #2 unless your buddy put it up on the centerstand and revved it until it blew. The motor was stock, so you can rule out #3. That leaves #1, a defective part or parts.

Please post photos when you split the cases so we can see what really happened.

Sorry about the demise of your Blur's motor.
+1: My money's on the crank as well. And definitely +1 (or +5) on wanting to see pics.
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Post by Lostmycage »

Have you had the opportunity to dig into it yet?
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Post by bluelghtning »

Lostmycage wrote:Have you had the opportunity to dig into it yet?
No I haven't. I had someone contact me and they had thought about just buying the Blur from me like it sat, but didn't want me to take it apart any more, so I held off while they thought about it, but in the end, they changed their mind.

My wife and I ended up having a huge maintenance day the past weekend on all our other bikes with numerous oil changes, washes, etc to keep are other bikes in good shape, so I never got to the Blur.
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Post by bluelghtning »

Pulled the motor out.

Updated pictures here - viewtopic.php?p=166719
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