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Post by midlifecrisisrd on Jun 11, 2021 18:50:38 GMT 1
It's just weird it doesn't erode the alloy but the stainless disintegrated
Looks almost like it's like electrolysis has eroded the stainless
I'll measure it all first and see how it is
Need to try and get the bearing off the other stem. May see about getting it pressed out with the stem. Ain't paying £34 for another lol
Steve
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Post by tony2stroke on Jun 11, 2021 19:19:41 GMT 1
It's just weird it doesn't erode the alloy but the stainless disintegrated Looks almost like it's like electrolysis has eroded the stainless I'll measure it all first and see how it is Need to try and get the bearing off the other stem. May see about getting it pressed out with the stem. Ain't paying £34 for another lol Steve Here is something you may find interesting. www.albanycountyfasteners.com/blog/stainless-steel-and-aluminum/ |
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Post by oldbritguy on Jun 11, 2021 20:22:36 GMT 1
That is very interesting
I always knew there was a reaction with stainless fasteners in ally cases and they would fur up and occasionally seize when left in situ for a long time. I have always used a smear of copper grease on stainless fasteners in the belief that it would arrest the corrosion but it seems maybe not. The fact that over the years my old oily Brit bikes would be regularly pulled apart anyhow may have negated this.
Something definitely to think about when replacing std engine fasteners with stainless.
Oh, hopefully you’ll get the yokes sorted without any grief Steve
John 🙂
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Post by midlifecrisisrd on Jun 11, 2021 21:15:40 GMT 1
Knew about the reactions between the 2 materials
Biggest thing is moisture getting in. To a degree the grease will stop water ingress so reduces the effect
I've noticed when you buy billet yokes it isn't copper grease on the threads but some other kind
May just be silicone grease, got plenty of that
Steve
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Post by Tobyjugs on Jun 14, 2021 11:25:41 GMT 1
Yes, I'm maybe going to have to scotchbrite the lower bearing section Also didn't realise the process was so aggressive The 2 spacers had stainless threaded rod threadlocked into it I thought as they were stainless they would be ok WRONG The protruding section is gone now 😮 Steve Its an acid based process so you'd need any stainless to be 316 or better to have some resistance to the process, 12 micron application also means 24 microns lost on your bearing mating surfaces, I'd be tempted to clean it off so that the bearings are a push fit rather than risk galling the two up. That's valid point about the tolerance. If you don't have the right measuring tools wouldn't it be easier to check before removing material? |
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Post by Robbieben on Jun 14, 2021 11:29:04 GMT 1
Its an acid based process so you'd need any stainless to be 316 or better to have some resistance to the process, 12 micron application also means 24 microns lost on your bearing mating surfaces, I'd be tempted to clean it off so that the bearings are a push fit rather than risk galling the two up. That's valid point about the tolerance. If you don't have the right measuring tools wouldn't it be easier to check before removing material? Yes, check fitment of the bearings before removing any material, i'd just gently remove material until the bearings are a snug push fit. |
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Post by Robbieben on Jun 14, 2021 11:39:25 GMT 1
Knew about the reactions between the 2 materials Biggest thing is moisture getting in. To a degree the grease will stop water ingress so reduces the effect I've noticed when you buy billet yokes it isn't copper grease on the threads but some other kind May just be silicone grease, got plenty of that Steve Any good quality grease is suitable for the fixings into Aluminium, I use silkolene synthetic Pro RG2 grease. Its a non conductive grease. www.ebay.co.uk/itm/284165912377?epid=1325304023&hash=item42299bb739:g:8oMAAOSwXChgFG85 |
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Post by steve h on Jun 14, 2021 12:25:59 GMT 1
Knew about the reactions between the 2 materials Biggest thing is moisture getting in. To a degree the grease will stop water ingress so reduces the effect I've noticed when you buy billet yokes it isn't copper grease on the threads but some other kind May just be silicone grease, got plenty of that Steve I've worked on lots of cables with ally conductors. When terminating the cores we used a grey anti galvanic paste on the connectons (lugs to tinned copper-lug to core) I daresay this would not go amiss on any s/s fastnings to aluminium and its alloys. On breweries, stainless steel to galvanized is problematic, we used rubber gasket between the two and the anti galvanic paste, and on the earth links between the two dissimilar metals. It is something to look out for on bikes, but its always on my mind because of previous work environments. Got a buddy who's a jointer? They'll have some of this. www.cablejoints.co.uk/sub-product-details/earth-bars-copper/unial-jointing-paste |
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Post by midlifecrisisrd on Jun 15, 2021 15:06:58 GMT 1
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Post by dusty350 on Jun 15, 2021 15:35:48 GMT 1
Ooooh lovely😍
Looks like they have done a fantastic job mate🙂
Really exiting when parts like this arrive back
Dusty🙂
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Post by abar121 on Jun 15, 2021 15:55:01 GMT 1
That is looking awesome!
It's getting too tempting. I keep coming back to Kawa triples and just sold my H2B.
Hmmm.
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Post by midlifecrisisrd on Jun 15, 2021 16:44:29 GMT 1
It does look very well done
They even managed to get the 2 sheared exhaust studs out without having to helicoil or fit inserts
Really need to split the bottom end now 😰
Steve
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Post by Robbieben on Jun 15, 2021 17:05:27 GMT 1
They do some lovely work at BDK, you'll be heading towards 95 Hp and a whole bucket load of torque with these modifications.
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Post by midlifecrisisrd on Jun 15, 2021 17:27:27 GMT 1
They do some lovely work at BDK, you'll be heading towards 95 Hp and a whole bucket load of torque with these modifications. Hopefully so. Keeping low down torque was one of the reasons I stopped short of full TR tune and fitting 36mm carbs I asked for around 100hp so would be very happy with 95 Dave Swarbrick also supplied stuffers for the exhaust port to taper the port to the header size Steve |
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Post by JonW on Jun 25, 2021 1:38:40 GMT 1
that is lovely work. You get what you pay for in this life. very nice Steve, put those parts on the mantlepiece until you need em  |
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Post by midlifecrisisrd on Sept 1, 2021 13:11:51 GMT 1
Haven't done much with this lately
Engine is on the bench so I've been removing bits off it as I get little bits of time
I was a bit disheartened when I turned the engine around and noticed from the different angle the 2 crankcase studs that the barrel had stuck on were badly bent just below the thread so would need replaced
You hear so many horror stories about removing them that I threw some rags over it and ignored it for a while. I was thinking I'd have to send it away to a specialist
Anyway I had got stuck removing the clutch basket as I didn't have a 32mm socket so last week I popped into halfords to buy one
While in there I noticed a tool which looked like a drill chuck and was marked as stud extractor for impact guns
It was a cheap brand and only £20 so i bought it convinced it would most likely not work
I'll pop pics up later but I simply clamped it onto the stud (m10×1.25), heated it for a few minutes with a blow lamp before sticking the impact gun on the end
Holy fook! It only went and got the studs out no problem
I'm amazed a cheap looking thing did the job without even chewing or slipping 😀
Steve
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Post by oldbritguy on Sept 1, 2021 13:31:58 GMT 1
That is a success Steve.
After looking at those studs I did think the worse however all turned out good. Well done sir!
No need for sending off now. Cash saved towards some more expensive parts 😂
John
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Post by midlifecrisisrd on Sept 1, 2021 13:36:40 GMT 1
That is a success Steve. After looking at those studs I did think the worse however all turned out good. Well done sir! No need for sending off now. Cash saved towards some more expensive parts 😂 John Yes but it's gave me another conundrum 🤔 Do I try and get the other 8 out and replace them all 😬 At the moment I'm swaying to leaving well the feck alone 🤣 Now got the issue of finding replacement steel ones 😭 Stainless are available but then that opens the stainless into allow debate I do it all the time on the m6 rd case studs but they are easy to sort if you get a problem. Steve |
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Post by midlifecrisisrd on Sept 1, 2021 13:43:52 GMT 1
Just checked
Full set of stainless studs £70
Full set of titanium studs £175 😱
The titanium would mean the barrel would never stick again and saves nearly half a kilo 😏
Steve
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Post by Tobyjugs on Sept 1, 2021 13:47:55 GMT 1
Hi Steve it would remove them all if possible, as for replacement studs i would choose steel over stainless steel. I just dont like using SS bolts in aluminium due to the reaction between the two materials and i dont know much about the tensile strength of the SS.
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Post by Tobyjugs on Sept 1, 2021 13:49:35 GMT 1
Just checked Full set of stainless studs £70 Full set of titanium studs £175 😱 The titanium would mean the barrel would never stick again and saves nearly half a kilo 😏 Steve Titanium or steel. Stainless is for the bling bling brigade. No offence King Yogi |
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Post by Robbieben on Sept 1, 2021 14:40:26 GMT 1
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Post by abar121 on Sept 1, 2021 15:00:11 GMT 1
Another vote for steel.
Half a kilo is water off a ducks back with that motor!
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Post by midlifecrisisrd on Sept 1, 2021 15:05:51 GMT 1
Another vote for steel. Half a kilo is water off a ducks back with that motor! Very true, 500g off 70kg ain't much 😆 Steve |
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Post by Tobyjugs on Sept 1, 2021 15:49:10 GMT 1
Just a couple of mars bars and doughnuts.  |
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Post by cb250g5 on Sept 1, 2021 16:38:03 GMT 1
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Post by midlifecrisisrd on Sept 1, 2021 17:04:14 GMT 1
Thanks but think I'm sorted
A very nice man from the Kettle Club says he will send me 2 good used ones 🤗
Steve
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Post by midlifecrisisrd on Nov 3, 2021 15:01:06 GMT 1
Done next to hee haw on this. Did get the generator off the end of the crank after a bit of a fight
Just had a call from Nova Race transmissions saying the close ratio conversion is ready
ITS BEEN 12 BLOODY MONTHS 😯
So once I pay the £798 ransom they will send it 😫
Steve
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Post by Tobyjugs on Nov 3, 2021 18:36:22 GMT 1
I think the service from them is a bit crappy and they may be a bit expensive but the components they make have a good reputation for reliability.
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Post by midlifecrisisrd on Nov 3, 2021 18:44:24 GMT 1
Hopefully so 🙏
I'll hold onto the converted GS750 box just in case
Steve
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