Danish newb with a '92... - and a cracked engine..
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Junior Member
Joined: May 2009
Posts: 5
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From: Aarhus, Denmark.
Danish newb with a '92... - and a cracked engine..
Hallo!
Short introduction; 23-year old automotive mechanic from Aarhus, Denmark, with no experience in motorcycles what so ever. It was actually not intended, but as I got a very good offer on this bike, I jumped it!
As written, it's a 1992 with 70.000 km's ran, painted in a "candy red"-rubber surface colour.
I removed the engine yesterday, and could see that no oilseal was the reason for a slight oil-leak, but actually a long-going-around-corner-crack of the right transmission-side of the engine - see pictures...:
My main question right now is, do You think this can be welded? I'm having my own doubts, as the mountbolt of the engine goes trough right there, causing alot of stress to the metal....
I am already considering the possibility that a have to find another engine, can You guys maybe give me some advice as to what to look out for?
And some of the bike itself:
Short introduction; 23-year old automotive mechanic from Aarhus, Denmark, with no experience in motorcycles what so ever. It was actually not intended, but as I got a very good offer on this bike, I jumped it!
As written, it's a 1992 with 70.000 km's ran, painted in a "candy red"-rubber surface colour.
I removed the engine yesterday, and could see that no oilseal was the reason for a slight oil-leak, but actually a long-going-around-corner-crack of the right transmission-side of the engine - see pictures...:
My main question right now is, do You think this can be welded? I'm having my own doubts, as the mountbolt of the engine goes trough right there, causing alot of stress to the metal....
I am already considering the possibility that a have to find another engine, can You guys maybe give me some advice as to what to look out for?
And some of the bike itself:
Senior Member
Joined: Jan 2009
Posts: 191
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From: Dundee, Scotland.
Hi Niko and welcome to the forum.
I think you already know the answer to this. I might be totally wrong here but here goes. The block construct is cast alloy and would require TIG welding. If you have the welding gear yourself give it a try. It would need a good clean up to take the weld and use it as a filler, I think it would be awkward to do on the inside of the mounting lug, but possible. Then rebore the lugs hole to correct size. The weld should be strong but around the mounting area I don't know what forces are involved there, and would it hold? Since I've been here I've never heard of this job being done, so it could be trial and error.
If you don't own the welding gear it might be cheaper picking up a whole engine and replace, giving you a load of internal spairs from the cracked engine.
In the UK there are engines coming up on ebay quite regular at less than £100.
BTW, the rest of the bike looks like it's in great condition so the job is worth doing to get her running.
Good luck, and keep us posted on progress.
I think you already know the answer to this. I might be totally wrong here but here goes. The block construct is cast alloy and would require TIG welding. If you have the welding gear yourself give it a try. It would need a good clean up to take the weld and use it as a filler, I think it would be awkward to do on the inside of the mounting lug, but possible. Then rebore the lugs hole to correct size. The weld should be strong but around the mounting area I don't know what forces are involved there, and would it hold? Since I've been here I've never heard of this job being done, so it could be trial and error.
If you don't own the welding gear it might be cheaper picking up a whole engine and replace, giving you a load of internal spairs from the cracked engine.
In the UK there are engines coming up on ebay quite regular at less than £100.
BTW, the rest of the bike looks like it's in great condition so the job is worth doing to get her running.
Good luck, and keep us posted on progress.
September 2009 ROTM Winner - Faster than a Speeding ..........
Joined: Nov 2008
Posts: 3,808
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From: UK
Hey Niko , nice looking bike , cool colour.
Sorry don't know anything about welding , but it looks like a lot of work . As Mo say's would be much simpler to slot a second hand engine in there and keep the other for spares or sell for parts . Worth doing though , she's a good looking bike.
Sorry don't know anything about welding , but it looks like a lot of work . As Mo say's would be much simpler to slot a second hand engine in there and keep the other for spares or sell for parts . Worth doing though , she's a good looking bike.
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Giday Niko and welcome aboard the CBRF..
First- , go see what price you can pick up an engine for where you are..?.
If they are rare or to expensive, I think the welding would be quite ok , but I think it would be better to be to be attempted by some one with some skill in what I think will be Argon Arc welding for the cases... ...
As long as who ever does it does not blow through
, it would be fine...
First- , go see what price you can pick up an engine for where you are..?.
If they are rare or to expensive, I think the welding would be quite ok , but I think it would be better to be to be attempted by some one with some skill in what I think will be Argon Arc welding for the cases... ...
As long as who ever does it does not blow through
, it would be fine...
Redcoat, & Maxwell's Silver Hammer, MVN and curmudgeon
Joined: Dec 2007
Posts: 11,608
Likes: 5
From: Mud hut, Zululand
You may be able to weld it - yes there is quite a lot of stress on the area but when the engine is bolted back into the bike the stresses will be distributed over a bigger area. TIG welding will be very strong - as MO says take it to a shop that specialises in this kind of repair.
The experts will give you a better answer when they've looked at it.
Welcome to the Forum !
Nice bike too Niko!
The experts will give you a better answer when they've looked at it.
Welcome to the Forum !
Nice bike too Niko!
Last edited by Shadow; May 18, 2009 at 04:23 AM.
Thread Starter
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Junior Member
Joined: May 2009
Posts: 5
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From: Aarhus, Denmark.
Did find a good welder, he wasn't sure at the beginnning but as the result came in, he mentioned somewhat 95% it will work - so I'm giving it a try!
This following week I will adjust the valves, change sparkplugs, sealings and all that and hopefully next sunday this 2-week project will result in a summer-ready bike!
This following week I will adjust the valves, change sparkplugs, sealings and all that and hopefully next sunday this 2-week project will result in a summer-ready bike!