Matchless G11
Matchless G11
.The G11 was a development of AMC's 500cc twin; in late1955 the Matchless G9 was stretched to produced the G11, while its counterpartAJS Model 20 became a Model 30. The new 600s shared a 593cc engine (72 x 72.8mm)running 7.5:1 compression, which output around 33bhp at 6800rpm.The 600s weresomething of a stop-gap model, replaced three years later in the AMC line-up bythe 650 Model 31 and G12. As a result, the G11 is normally over-shadowed by itslarger counterpart and many folk dismiss it. 'They were interim machine that donot fall into recognised capacity limits and do not fit our accepted thinking'is how one buyer's guide dealt with the 600s.However, these days the affordable and reliable 600s shouldn't be discounted -they're 'very pleasant to ride, with a generous spread of power and adistinctive style. They sound good, too. The 600 engine is fairly unstressed,proving little quicker but more flexible than its smaller stablemate. When new,a G11 would reach just under the ton, and the tweaked sports version was thefirst sports-roadster bike to travel 100 miles around MIRA's test track withinone hour. 'I had the first ride out -- some 25 miles cruising along at 40 to 55mph,'reported Neil immediately after the ride. 'This is the first time in two yearsthe bike has been ridden and she ran beautifully. Lots of 'firsts' here as itwas the first time I had ridden a Matchless… and my first impressions were veryfavourable. This is a machine which epitomises what classic motorcycling withCBP is all about. A relaxed riding speed, comfortable seating position, niceburble to the exhaust without being obtrusive, easy starter... and a greatlooking machine to boot!'I thought the gearbox was smooth and felt positive with no unexpected neutrals.The clutch was light and progressive with no slip or drag. The handling was alittle heavier than some of my other machines -- particularly the BSAs -- but itinstilled immediate confidence. I've yet to scrape the footpegs but give me afew more miles…!'It's a smooth engine with no vibration to speak of either through thefootrests, seat or handlebars (but then I was taking it easy for running in).The engine appears to be oil tight so far: thank goodness, because that was thereason for the strip down!'Neil finished the day by tightening down the cylinder head, then set off thenext morning on the second leg of the shake down - a further 120 gentle miles.He discovered that, as with many AMC bikes of this period, the primary chaincaseis prone to leaking (you can try to fix it until the cows come home, or chalk itup to being 'one of those things'!), and noticed that a couple of the tankmounting bolts and rubbers had worked loose with the vibration. Nothing unusualthere - which is why it pays to clean down the bike after a decent ride and justcheck that nothing has worked itself free…So what does Neil think of the Matchless 600, now that he's clocked up some moremiles? 'The good news is that she always starts first or second kick... mostimportant. And I've decided the handling is NOT 'heavy' as I first described.The bike feels sturdy and robust, and so the handling is predictable andreassuring. Choose what words one will, but it's unfair to say that it's heavy!'So the G11 passed its entrance exam, and is now a full time member of theClassic Bike Provence team.