markg Posted May 7, 2016 Report Share Posted May 7, 2016 Hi all, Are there any differences in barrels, pistons or heads between the 199 and the 199A models? Quote Link to comment Share on other sites More sharing options...
bullylover Posted May 7, 2016 Report Share Posted May 7, 2016 Hi Mark. I don`t think there is a difference. There might be minor porting differences but it is only very minor. They both used the same exhausts and carbs with the same jetting and the same airfilter and the same ignition timing. Graham. 1 Quote Link to comment Share on other sites More sharing options...
smelling123 Posted May 8, 2016 Report Share Posted May 8, 2016 I thought the head to barrel interface was different? One has stepped spigot type from memory Quote Link to comment Share on other sites More sharing options...
bullylover Posted May 9, 2016 Report Share Posted May 9, 2016 No it is the earlier ones that have the liner above the barrel. My M151 engine is like that. I have a M199 apart at the moment and it has a copper gasket the same as a M199A. 1 Quote Link to comment Share on other sites More sharing options...
bondy Posted May 10, 2016 Report Share Posted May 10, 2016 (edited) A lot think all the Exhausts are the same but there not I bought a 199A Exhaust so I was led to believe although it did fit is was sitting to high and was nearly touching the tank. Turned out the Exhaust was for a 159 Edited May 10, 2016 by bondy Quote Link to comment Share on other sites More sharing options...
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