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Author Topic: XS750 to XS896 big bore  (Read 23073 times)

Offline datadavid

  • Posts: 1120
Re: XS750 to XS896 big bore
« Reply #230 on: Aug 27, 2017, 17:00:23 »
Probably: using the wrong filler material/welding too hot/no backing gas/wrong type of shielding gas. Or no post-heat treatment normalization of haz-zone.

Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #231 on: Aug 27, 2017, 19:57:27 »
Quote
no post-heat treatment normalization of haz-zone.

What are your suggestions on the post welding normalisation. Does it need a bit of warming with the oxy, before and after welding with the arc?
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline datadavid

  • Posts: 1120
Re: XS750 to XS896 big bore
« Reply #232 on: Aug 29, 2017, 05:07:09 »
If you are welding mild steel onto chrome moly, i think a correct alloy filler is more important, but yes, preheat to annealing temps, weld, and post heat at annealing temps. Should not really be necessary with somewhat modern chromoly alloys and thin wall tube, but since its cracking you need to do something else. The arc welder probably isnt the best choice either. Which rods do you use?

Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #233 on: Aug 29, 2017, 06:41:11 »
Thanks Dave
I have used standard mild steel rods. I then had a mate MIG weld it with the same result.
Guess I should use some low hydrogen rods? With pre and post heat treatment? ???
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline datadavid

  • Posts: 1120
Re: XS750 to XS896 big bore
« Reply #234 on: Aug 29, 2017, 18:49:12 »
You might have better luck with high cromium content tig/mig filler. ER80 seems to be available worldwide, and just to make sure, do you know what shielding gas was used? Pure argon would be best, no argon/co2/h2 mixes, although i think ArH2 would actually work.

Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #235 on: Sep 02, 2017, 23:59:37 »
Came up with a choke mechanism today for the Triumph Mikuni BST36SS carbies - happy with the result.
Where the cable usually feeds into the carbies, I made up a couple of polypropylene bushes out of home irrigation tube. The shaft is 4mm steel rod with a M4 thread cut on each end. I then made up a friction leaf spring to hold the choke open and closed. At this point it is just creating friction. If needed I can cut a small grove in the shaft and centre punch a detent in the leaf to give a more positive positions.
All mods are reversible, if in the future I do want to use a cable.
New slide guides are on the way for the carbie clean & rebuild.
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #236 on: Sep 04, 2017, 06:00:07 »
Finished the headlight mounts - they are bloody solid.
The only problem is that I now need to start to sort out the electricals - my least favorite subject. I found the problem with my charging system. Both wires were broken and the only thing holding the wires together was the fabric wrap. All fixed now.
« Last Edit: Sep 04, 2017, 06:33:36 by XS750AU »
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N

Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #237 on: Sep 04, 2017, 07:30:22 »
Talking electricals - has anyone have some experience of these batteries?? They look a very good option to hide.
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N


Offline XS750AU

  • Posts: 310
Re: XS750 to XS896 big bore
« Reply #239 on: Sep 05, 2017, 00:06:44 »
Hi Irk

Good point - I have sent off an Email asking about a warranty. Lets see if they reply, that will be make or break!!
If you want to read up on them here is the link - www.shop.modernmotorcyclecompany.com.au/collections/electrical/products/battery-240cca-lithium-ion
Says they are in Australia, USA and Europe!!!
« Last Edit: Sep 05, 2017, 01:07:41 by XS750AU »
“Engineering is the art of being approximately right rather than exactly wrong.”

Yamaha XS750-2D
Yamaha XS896
Husaberg FE550
Yamaha TT250
Yamaha IT200N