MDA Motorcycle Engineering

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MDA Motorcycle Engineering Mechanical restoration and repair of motorbikes, specialising in classic and vintage motorcycles.

probably the the last batch of these lovely adjustable magneto sprockets ive been making for almost 30 years , these ar...
23/09/2026

probably the the last batch of these lovely adjustable magneto sprockets ive been making for almost 30 years , these are not cnc'd made as individual items i have available
4 x Ariel singles
2 x Norton 15T ES2
2 x Norton !6 T International
2 x Velocette KSS and KTT
2 x AJS/ Matchless
please contact if your interested or wish to buy the drawings to keep it going

See this bottom frame member of an AJS , the hole for side stand completely knackered out . It took me a while , how to...
14/09/2026

See this bottom frame member of an AJS , the hole for side stand completely knackered out . It took me a while , how to hold the darn then the extra thinking , I the it moves down whilst boring , better support it so it don’t move ! Done it ! 😊

14/09/2026

Just a small video of how I manage to grind Ariel cam followers. Everything is squared up and it’s the minimum “lick “ to clean the radius of the foot up

Had a Yamaha YZR cylinder with a huge detonation problem that burnt away the alloy jacket behind the nickasil wall ( how...
03/08/2026

Had a Yamaha YZR cylinder with a huge detonation problem that burnt away the alloy jacket behind the nickasil wall ( how to fix this ? Problem took a few days of thinking ). But we got there Gavin Eales

Well look what’s in my hand luggage , back to South Oz , prizes for guessing ! 🤣 oh and some 7/16 hi tensile rd bar and...
18/06/2026

Well look what’s in my hand luggage , back to South Oz , prizes for guessing ! 🤣 oh and some 7/16 hi tensile rd bar and. A piece of of BSF hexagon both stainless steel unobtainable in Australia

Finally got the vincent heads machined and assembled even nailed on to the bottom end. Next up is the cam timing ( can...
05/03/2026

Finally got the vincent heads machined and assembled even nailed on to the bottom end. Next up is the cam timing ( can’t wait ) 50’ V twin I’m up for it , I have no paperwork that the new cams should have ( it’s all new parts) but I’ll get there , I can work it out .

It’s been a while since the last post. But here I’ll try to explain about the 2 x Vincent heads I’ve had to do for some ...
23/02/2026

It’s been a while since the last post. But here I’ll try to explain about the 2 x Vincent heads I’ve had to do for some time now . These heads and the valve operation are like no other. Vincent use 2 valve guides on each valve , of different internal diameter a top and bottom ( conventional is in the head, retained by a screwed lock ring ). The rocker arm is placed in between the 2 guides. Pushing on a collar and pulling the valve spring down . Now of course everything has to be totally aligned. The valve seat angle again is Vincent at 30 degrees not the usual 45 degrees . Take a look the alloy spring base doubles as the top valve guide. Tricky s**t. ! 😊

Watching you tube. I know som stuff but this one has got me 😂 wtf is going on here
02/02/2026

Watching you tube. I know som stuff but this one has got me 😂 wtf is going on here

Well I brought 2 x Mudguards in my hand luggage 18 months ago just started to see how they will fit on my 1906 Clipper
06/01/2026

Well I brought 2 x Mudguards in my hand luggage 18 months ago just started to see how they will fit on my 1906 Clipper

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Littlehampton, SA

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