micky Posted July 19, 2007 Report Share Posted July 19, 2007 could some body help me find rings for my 320 yellow Majesty I am doing up? I am a new member. I am English but now live in France. I did a lot of Competition as a Schoolboy in the UK (1979-1983) Including the ACU National series. I was lucky enough to have quite a selection of Majestys and Whitehawks to ride at the time due to my involvement with the T+MX editor and the Newton and district Trials club that was run by Big Wim Harrison who was the Guardian of Kevin Bleasdale (sadly no longer with us)who was sponsered by John Shirt. Back to the question! My Majesty has a Piston size of 81.3mm that would make it 5th over size RT360 (if the is such a thing) Any ideas? Also, I need a side stand or one to copy and a Exaust guard. HELP Quote Link to comment Share on other sites More sharing options...
woody Posted July 19, 2007 Report Share Posted July 19, 2007 Rings are available I believe but the problem is identifying the rings you need to match the piston. As it is now on oversize it could be difficult to identify exactly what piston it is as 81.3 seems an odd size. Standard bore for the 320 is 80mm and Yam pistons go up in 0.5mm oversizes as far as I know. Piston for the 320 came from either a DT360 (windows cut into the rear skirt) or a YZ360 (no windows as a big arch was cut out of rear skirt) There are a couple of Yamaha dealers in the back of TMX who specialise in old YZ Yams - Motoward and Yamaha Spares UK I think. We've tried them for rings but they need the part number of the piston to be able to match the rings properly as there are different types of piston/ring combinations apparently. May be worth giving either a call. There is also Keith Lynas in the US who specialises in Ossa but also has a good knowledge of Yams too and he advertises Yam DT/YZ NOS pistons and rings on his website, so maybe he could help also. He's very helpful with enquries. Keith Lynas Alternatively, if you know Shirty, try him but if you don't I wouldn't waste your time - I don't, I did and I did - in that order.... Or try a mate of mine who knows a fair bit about Yams and has some pistons, but no rings I don't think TY Offroad For a sidestand and exhaust shield try the breakers Ellastone Offroad or A&B Autos, both advertise in TMX under spares. Both have broken a good few TY250 Yams. Quote Link to comment Share on other sites More sharing options...
scrumpyjack Posted July 20, 2007 Report Share Posted July 20, 2007 Micky, PM me and i will pass on the number of a friend of mine,, he has been collecting pistons for 320 Majesty's ever since i had Norman Shephards ex works bike, i had trouble finding a piston for that because they used to bore them out even further making them 350cc..!! I cant remember the exact piston size Scrumpy Quote Link to comment Share on other sites More sharing options...
woody Posted July 20, 2007 Report Share Posted July 20, 2007 The DT/YZ400 piston which is 82mm gives 340cc, so the 82mm oversize pistons go out to almost 360 I've run mine as 320 and 340 and can't tell any difference between the two Quote Link to comment Share on other sites More sharing options...
frenchie Posted July 20, 2007 Report Share Posted July 20, 2007 I have just added a wes exhaust, to my majesty andwhich I have the old system spare. It has a newly painted exhaust guard, if your interested call BPS engerneeing he is in France near Cahors 06 87 38 35 30 make him an offer... I get out and about and do a few of the twinshock, pre 65 trials around France on a Majesty I.ll look at for you.... Quote Link to comment Share on other sites More sharing options...
micky Posted July 20, 2007 Author Report Share Posted July 20, 2007 Thanks Guys, It is all very confusing! The last Majesty I had was a chrome framed 250 I did not realise they came in so many variations. Can anyone help with my frame number? It is 810786. Quote Link to comment Share on other sites More sharing options...
woody Posted July 20, 2007 Report Share Posted July 20, 2007 That would make it an earlier Godden framed bike which should have the rear mudguard loop. 81 in the number means 1981 Quote Link to comment Share on other sites More sharing options...
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