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V50 mk2 Resto

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GC888 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2018 at 15:57


Originally posted by Dennis menace Dennis menace wrote:

Incidentally,

Make sure you use sacrificial bolts in all threads or you will have to clean them out with thread taps, much easier to sacrifice a few bolts. Seal the headstock bearing cups as powder coat goes everywhere. I used a length of m10 studding from B&Q and large repair washers to seal of the headstock.

+1 on the protection the grit they use can gather in the frame tubes and drop into head bearings. 


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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2018 at 22:38
Ok, the frame is ready to go for powder coating, bolts in all threads. I just need to protect the headstock. Are the chrome caps removable ? if so, how do they come off ? are they threaded or just a push fit ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2018 at 23:58
push fit you need need a long ish punch (soft metal bronze or alloy) to gently persuade them out.

Warm/heat the frame head then damp cloth on the bearings to cool, then work round the inner lip tapping from the inside opposite end as you work them out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 2018 at 21:49
Ok. I have been away for a couple of weeks. The frame went off to Total Wheel Works before I went. picked it up today & they have made a really good job (thanks Denis). I sourced 2 sets of piston rings & various gaskets etc. so I'm starting to feel like things are progressing slowly.
 
I want to clean the engine & gearbox, it is quite scruffy. I struggled with my old BMW, but I would like to make a really good job of this. Any tips please ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2018 at 08:28
Low pressure soda blasting works well (as in hobby equipment rather than the full industrial gear)

Effective in shifting the baked on muck and cleans back to the alloy. Downside is it takes time and uses lots of soda, you need kit adapted for soda. Upside is if you do it outside it washes away when it rains.

The soda also gives a protective layer.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 09 Apr 2018 at 18:37
Thanks Dennis, I have ordered a diy soda kit. Keen to see the result.
 
In the meantime. while I have the engine on the bench, I thought I would look at the ignition system. My bike is a Mk 2 so there are no points. Am I correct in assuming that the pick ups are located behind the alternator ? Is there any way of testing them without removing them (test meter perhaps) ?
 
Thanks, Paul
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Post Options Post Options   Thanks (0) Thanks(0)   Quote redmunk Quote  Post ReplyReply Direct Link To This Post Posted: 09 Apr 2018 at 22:21
Bought a little paint sprayer style soda blaster for about £40 as an experiment...it did not much at all to clean the gunk off my V35 engine after it had been degreased. Went through a 5kg bag of soda just for the heads and it looks a little better in places but barely a difference. You’ll need a high flow compressor too, my 15cfm one could just keep up.

Maybe a proper sandblaster filled with soda would work better, but the little guns seem to be useless.

I personally wouldn’t recommend it. What has worked well is abrasive plastic filament brushes in a drill, it’s hard to get into the tight spots but it gets all the discolouration off.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jerry atric Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 2018 at 08:45
Send it to Ex smoking biker on this forum. Ken Guzzibear put a photo of his Vthou up and the engine looks like it just came out of the factory
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 2018 at 11:59
That's professional bead blasting, so much better.
 
I hope you bought the coarse soda, the fine stuff does almost nothing, as I once found out.
I used a spot blaster with it (Aldi or Lidl special).
Brian.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 10 Apr 2018 at 14:07
Originally posted by redmunk redmunk wrote:

Bought a little paint sprayer style soda blaster for about £40 as an experiment...it did not much at all to clean the gunk off my V35 engine after it had been degreased. Went through a 5kg bag of soda just for the heads and it looks a little better in places but barely a difference. You’ll need a high flow compressor too, my 15cfm one could just keep up.

Maybe a proper sandblaster filled with soda would work better, but the little guns seem to be useless.

I personally wouldn’t recommend it. What has worked well is abrasive plastic filament brushes in a drill, it’s hard to get into the tight spots but it gets all the discolouration off.

Guess its a few different factors in getting them to work I use blasting soda that has additives to help it flow and not clog. Also adjust the nozzle well out so it mixes in with the air well. Using less than 15cfm.
I use it quite a lot and haven't got through a 25kg bag yet.

Used it to clean my inner hubs this weekend and they came out like new in less than 10min...

I would suggest you get a full face protector too as the used soda comes straight back in your face at speed, and while its inert its also unpleasant and has the crud it just cleaned off in it!    

Low pressure soda will only shift the crud, not get rid of the discolouration in the alloy castings for this you need to take the surface off with a higher pressure or more aggressive grit. Then unless you coat it with something the discolouration will show again quite soon. With a more aggressive grit and higher pressure you give the casting a matt surface which looks good but can be a dirt magnet.

You pays your money and takes your choice...!

 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Apr 2018 at 11:59
My soda kit came yesterday so I gave it a try.
The kit comprises a large plastic holding tank which holds 22kg of soda. it has a long rubber hose with a gun. The gun appears to have changeable nozzles, although there was only one with it. My compressor is about 10cfm, & seemed to keep up ok. It certainly takes the worst of the staining off, although it needs careful slow movements to remove everything without it being patchy. Also as mentioned by others, the soda goes everywhere.
 
I am happy with the results so far, more practice required
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Apr 2018 at 17:18

Cool - glad it works for you :-)  

Keep your soda dry mine is in the house near a radiator. 

The guns can have different nozzles which you can get new ones for, generally the lower the pressure the smaller the nozzle so you get the velocity of the abrasive right.

Soda everywhere yup - but it washes off when it rains and a quick blast with a blow gun shifts it from the bikes nooks crannies and you.

 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote paulrob100 Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2018 at 21:33
Hi, Is there anyway of testing the ignition trigger units while the engine is on the bench ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GC888 Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 2018 at 12:37
I guess your missing one or both sparks and its pointless?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 21 Apr 2018 at 14:19
Bosch units?
If so then you can check the resistance of each one, should be the same, but don't know what to expect.

Brian.

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