scottscotlands Posted January 25, 2011 Report Share Posted January 25, 2011 hi guys this s my first restore of a trials bike , i must have watched to much kick start as i kid , i have done a number of cars and bike over the years , now for the bike i dont know what year it is or even what cc it is heres a video and some pics and the frame and engine number. engine number is 51m20738 and the frame number is 51m18497 Quote Link to comment Share on other sites More sharing options...
nh014 Posted January 26, 2011 Report Share Posted January 26, 2011 You have late 79 or 1980 349 Cota. The lack of rear upper frame loop behind the seat and over the fender is the easiest way to distinquish between a 348 (actually 305cc) and a 349. Quote Link to comment Share on other sites More sharing options...
jimbo349 Posted January 26, 2011 Report Share Posted January 26, 2011 To add to the above the 349 motor has a bolt on inlet manifold and the 348 has the manifold cast into the barrel. Quote Link to comment Share on other sites More sharing options...
scottscotlands Posted January 26, 2011 Author Report Share Posted January 26, 2011 thanks guy so im 100% sure its a 349 thankyou again for your help. Quote Link to comment Share on other sites More sharing options...
bpilgrim Posted January 29, 2011 Report Share Posted January 29, 2011 (edited) The 349 also has an aluminium bash plate, whereas on the 348 the down tubes continue under the engine with steel mesh welded between them. Both the 348/349 share the 51M engine/frame number prefix, 15'700 348's were made (not sure if this includes the 3300 of the 348T), and I believe they just carried on counting for the 349. http://www.southwestmontesa.com/production.html Ben Edited January 29, 2011 by BPilgrim Quote Link to comment Share on other sites More sharing options...
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