drake Posted April 18, 2015 Report Share Posted April 18, 2015 Is it possible to build a Matchless/AJS 500cc short stroke motor using a roadster engine and one of those barrels advertised on E,Bay? or any other way for that matter Thanks Quote Link to comment Share on other sites More sharing options...
dick Posted April 18, 2015 Report Share Posted April 18, 2015 Why build one, buy one. Introduced in late '63 as road model, G80 & late '55 as comp model, G80 CS. Failing that get a 350 long stroke & build a 410 cc using short stroke piston. Described as "pulls & rev's". Dick. Quote Link to comment Share on other sites More sharing options...
drake Posted April 19, 2015 Author Report Share Posted April 19, 2015 Haven't been able to find one, motor that is Do you have anymore info on converting the 350, is it really that simple? BTW I want it for scrambles Quote Link to comment Share on other sites More sharing options...
jon v8 Posted April 20, 2015 Report Share Posted April 20, 2015 Can I suggest a slightly different route ? How about using an Ariel motor, with a barrel from Mick Dickenson,with a 350 crank you can get 505cc with an 87mm XT500 piston so 2mm oversquare.People also use 86mm XT350 pistons. Or you could go all out and use the 87mm XT piston and keep the standard 95mm bore for about 565cc. Brand new heads are available too,any old Ariel crankcases will do,a Morgo oil pump and a few other bits and pieces.... I think an HS cam may need a bit of finding,but it would be a good motor. I'm gradually amassing parts to build a 500 short stroke,its not a cheap process ! The only problem might be short big end life if you use the crowded roller 350 crank as some say they are a bit of a weak link, I suppose its possible to upgrade it, just depends how far you want to go with it. Apologies for rambling on. Quote Link to comment Share on other sites More sharing options...
dick Posted April 22, 2015 Report Share Posted April 22, 2015 Can't help with scrambles, assumed you were after a trials bike. If you fit odd pistons don't forget to get the crank rebalanced to suit. Dick. Quote Link to comment Share on other sites More sharing options...
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