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16 Jun 2020
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meanwhile, please let me ask this question.
Quote:
Originally Posted by Mezo
It is non repairable, my 600E cracked in the exact same spot, ...
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- does that mean that it's something like a "weak spot" of the engine? pretty concerned about it...
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16 Jun 2020
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first time i ever seen this type of failure and i run some heavily stressed XT based engines in my supermono and supermoto,
doesnt mean it cant happen, as we see.
im always more interested in the "why?"
one reason i can think of is heavily lugging at low rpm, but not that provable.
when you take the motor appart, check the right main bearing fit in the new cases, if its too loose, that could be another reason.
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17 Jun 2020
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R.I.P. 25 November 2021
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Quote:
Originally Posted by N67
does that mean that it's something like a "weak spot" of the engine? pretty concerned about it...
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Well if its going to go, it will go around that area as all the ones ive seen have done so right in that same spot (around the balance shaft) my 600E, a 3AJ Tenere & a TT600 Belgarda.
And there have been a couple of catastrophic failures in the same area due to the balance shaft key sheering & then that just detonates the engine case.
I wouldn't necessary cal lit a "weak spot" if everything is within spec & maintained its a strong engine, but if something goes wrong (bearing, key way etc) that is where the case will fail.
Mezo.
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17 Jun 2020
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Join Date: Jun 2020
Location: Dominican republic
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Quote:
Originally Posted by turboguzzi
first time i ever seen this type of failure and i run some heavily stressed XT based engines in my supermono and supermoto,
doesnt mean it cant happen, as we see.
im always more interested in the "why?"
one reason i can think of is heavily lugging at low rpm, but not that provable.
when you take the motor appart, check the right main bearing fit in the new cases, if its too loose, that could be another reason.
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ok, thanks I will check.
I used the bike as everyday ride for 2 years, and after 3 months of buying it I rebuild the engine, but dint change the timing chain, so in august last year I put the timing chain new, and I used to ride everywhere in Dominican Republic, and I was about to sell the bike before the engine started vibrating when you rev it, I thought it was a bearing but the right crankcase is cracked almost breaking part.
I am still waiting for the mechanic to disarm the engine
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17 Jun 2020
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Quote:
Originally Posted by Mezo
Well if its going to go, it will go around that area as all the ones ive seen have done so right in that same spot (around the balance shaft) my 600E, a 3AJ Tenere & a TT600 Belgarda.
And there have been a couple of catastrophic failures in the same area due to the balance shaft key sheering & then that just detonates the engine case.
I wouldn't necessary cal lit a "weak spot" if everything is within spec & maintained its a strong engine, but if something goes wrong (bearing, key way etc) that is where the case will fail.
Mezo.
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got it. thanks a lot.
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18 Jun 2020
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Quote:
Originally Posted by Mezo
Sorry i missed the year, so the main difference is how the clutch is operated, on yours the 4PT it is from the RH side & on previous models its from the LH side, i dont not know if this makes any difference internally though? i will try & find out if the case are the same.
EDIT: I sent Geoff a message so he may chime in soon with your answer.
Mezo.
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I found this lower engine 3tb on ebay, you think i can use this. It says they took it from a 1996
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18 Jun 2020
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Quote:
Originally Posted by Mezo
Well if its going to go, it will go around that area as all the ones ive seen have done so right in that same spot (around the balance shaft) my 600E, a 3AJ Tenere & a TT600 Belgarda.
And there have been a couple of catastrophic failures in the same area due to the balance shaft key sheering & then that just detonates the engine case.
I wouldn't necessary cal lit a "weak spot" if everything is within spec & maintained its a strong engine, but if something goes wrong (bearing, key way etc) that is where the case will fail.
Mezo.
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Mezo, not really following you here... the crack in Traians case is around the main crank bearing, not the balancer shaft.... are we talking the same failure here? or is it just my bad eyesight?  started wearing reading glasses lately...
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19 Jun 2020
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R.I.P. 25 November 2021
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Quote:
Originally Posted by turboguzzi
Mezo, not really following you here... the crack in Traians case is around the main crank bearing, not the balancer shaft.... are we talking the same failure here? or is it just my bad eyesight? started wearing reading glasses lately... |
Well around that area, mine was the same place as his but hairline cracks, his is a very bad crack, but they all seem to be on the RH side.
And traians, G30ff is going to chime in soon (hopefully) in regard to the 3TB engine & whether it can be used, he`s forgotten his password for the site but stay tuned.
Mezo.
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20 Jun 2020
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Hi Traians
If you're going to fit the complete bottom end in your bike then I'm sure it will be fine, you will need to remove any clutch operating mechanisms on the 3TB and fit the blanking plugs from your engine... you may need to buy new ones if you can't get them out.
You will need to check the condition of the 3TB... gearbox, small end, etc.
It would be preferable to fit a 4PT if you can find one..
Out of curiosity is the primary drive nut still tight on your engine?
Geoff
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20 Jun 2020
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Quote:
Originally Posted by Mezo
he`s forgotten his password for the site but stay tuned.
Mezo.
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Tel him to TRY and login with ANYTHING and he'll get an opportunity to reset his password - and find out his username if need be, so long as his email address is still valid! If not write me direct with details.
__________________
Grant Johnson
Seek, and ye shall find.
------------------------
Inspiring, Informing and Connecting travellers since 1997!
www.HorizonsUnlimited.com
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20 Jun 2020
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R.I.P. 25 November 2021
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Quote:
Originally Posted by Grant Johnson
Tel him to TRY and login with ANYTHING and he'll get an opportunity to reset his password - and find out his username if need be, so long as his email address is still valid! If not write me direct with details.
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He`s back in Grant, post above.
Cheers anyhow.
Mezo.
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20 Jun 2020
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Quote:
Originally Posted by G30ff
Hi Traians
If you're going to fit the complete bottom end in your bike then I'm sure it will be fine, you will need to remove any clutch operating mechanisms on the 3TB and fit the blanking plugs from your engine... you may need to buy new ones if you can't get them out.
You will need to check the condition of the 3TB... gearbox, small end, etc.
It would be preferable to fit a 4PT if you can find one..
Out of curiosity is the primary drive nut still tight on your engine?
Geoff
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Thank you very much! My mechanic just send me the picture of the crankcase, its just cracked so maybe im going to repair it. The best crankcase that i found was the one i send earlier.
https://rover.ebay.com/rover/0/0/0?m...2F293299270050
I dont put a 4pt because i don’t find one, in dominican republic we dont have parts of this bike. The mechanic send me a picture he disarm the complete engine, tomorrow ill go and send you more pictures.
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20 Jun 2020
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use welding as your very very last solution...
even if it's "just cracked", the temperatures of welding can distort the cases, change the tolerance of the bearings fit, etc.
a good welder will preheat the complete cases before welding so there is less distortion
of course that if you dont have another solution it is better than nothing.
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21 Jun 2020
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R.I.P. 25 November 2021
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Quote:
Originally Posted by turboguzzi
of course that if you dont have another solution it is better than nothing.
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That`s what i was thinking, worth a try i guess? but looking at his first picture is that a couple of hairline cracks i see? to the right.
Mezo,
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23 Jun 2020
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Quote:
Originally Posted by turboguzzi
use welding as your very very last solution...
even if it's "just cracked", the temperatures of welding can distort the cases, change the tolerance of the bearings fit, etc.
a good welder will preheat the complete cases before welding so there is less distortion
of course that if you dont have another solution it is better than nothing.
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Hi, mi brother took the cranckcase to get it repair, and its impossible ill have to buy one, the crank bearing has some freeplay.
I think im going to order the 3tb low engine because i dont find another one.
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