My G3LS 1953 - restoration project

Information relating to the Matchless G3 or AJS Model 16 350cc Heavyweight
Member
Posts: 36
Joined: Thu Oct 05, 2017 1:42 pm
Location: Poland

Re: My G3LS 1953 - restoration project

Postby sztyga20 » Sun Feb 24, 2019 7:09 am

I need your help.
I could not find any information about front and rear wheel offset (half width hubs), so I considered that wheels shoult be spoked simetrically. Now when I fit my front wheel I have on the left (drum side) 9mm wider gap between wheel rim / surface of slider than on the right.... It indicates that should be +4.5mm offset to the left. Similar situation concern rear wheel assuming that rim should be simetrically between surface of jampot sliders... So I going to re-spoke my wheel again, but could anyone confirm that front and rear wheel correctly are in simetrical posision between sliders?

Next problem: I haven't front stay of front mudguard (015015), I've tried find it on ebay, AMC spares, and our club spares - it is out of stock. So I have to produce it myself:/ I don't know what is correct shape of that part - is it tube flattened in the centre and ends or is it flat with round creases on the both sides...


Thanks.

Member
Posts: 36
Joined: Thu Oct 05, 2017 1:42 pm
Location: Poland

Re: My G3LS 1953 - restoration project

Postby sztyga20 » Thu Jul 11, 2019 3:44 pm

Two another great steps behind me.
I've finished rebuild gearbox.

Gearbox case after soda blasting. I prefer this techique over glass bead blasting which every time leaves small amounts of glass powder which is very hard to remove and may leads to bearing seizure or wear
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My workspace:)
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I forget to order gearbox main bearing, but my old one is in good condition, after cleaning and exchange grease I hope it should live forever.
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All bushes are new, I use as a material sintered bronze (is much better in comparison to phosphor bronze). AMES company produce a lot of bushes in variant sizes, so I've easly found few sizes which after treatment on lathe - perfectly fits to my gearbox, only fitting bushes of main shaft was quite complicated - these bushes must be perfetly pararell to each other. Originally parallelity (I suppose) was achieved by special long reamer after tight fitting bushes in sockets. I don't have special reamer so these bushes have specially 0.05mm wear between bush and socket surfaces, and they are fixed by bearing sealant - it allowes small movement in socket after mounting main shaft - (I hope you understand this complicated sentence:)



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Finished, everything works smooth and quiet
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Gearbox rebuild was much easier to rebuild than clutch...

First: hole for rolling bearing was oval with terrible wear. I couldn't find oversize rollers so I've made an experiment: hole was treatment on lathe, and rollers was replaced by bronze bush - (material Ba1054 - hard aluminnium bronze), I've seen clutches with bronze bushes in many motorcycles, so I hope it should works. If someone want's to try this method of regeneration must remember: bronze bush must be 0.1mm narrower than internal metal bush.

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Second: my clutch basket was worn like that one on this picture:
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I removed 10 old peripheral plates on lathe. Next I've made a project in CAD of one plate and ordered 10th pieces. Each plate was laser-cut in NVC1, 2,4mm hardened steel. According my old book about motorcycles' reastauration wear between peripheral-plates and internal plate teeths shound not exeed 0.2mm - It was very hard to riveting with such high accurancy, it has taken me a lot of time... but finally I've achieved success:)
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I've also got last two major missing parts

horn:
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and icing on the cake:
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