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Norvin Single race bike first run
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<blockquote data-quote="greg brillus" data-source="post: 127331" data-attributes="member: 597"><p>Just got home from a proper test run with the bike on a quiet back road in a sugar cane area........probably 1 and a half km's long and we used a bit over half of it.........So first thing was the throttle no longer sticking........Yipee........Then after a couple of runs it was clear that the oil leak was cured as well.......All good......So we had a proper lambda sensor hooked up to a bung hole in the header pipe.......we were looking for figures around the 0.55 to 0.65 lambda for methanol fuels.......this was difficult to achieve.......Best was around 0.68 to 0.73 at part throttle and it would lean out to a max of 1.25 on full throttle which is way too lean and obviously dangerous.......Various attempts to raise the needle and also the float bowl gave us a full throttle best at 0.90 which is still too lean........So raising the needle and the float was improving the top end but overly rich lower down, as the bike was a bit rough on low down acceleration. We will fine tune the bottom end so I can run it in a race next weekend........this is a small track so no harm should come of it.......But we need to improve the top end quite a lot........Anyway the bike itself performed very well with no noticeable issues........It feels like a single cylinder V twin....... I actually had to adjust the clutch as it was slipping on full throttle.......It certainly gets up some descent speed rather quickly.......So all in all, it was a good run, but importantly it told us that we need to do more before even attempting to run it on a dyno and/or a longer track.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 127331, member: 597"] Just got home from a proper test run with the bike on a quiet back road in a sugar cane area........probably 1 and a half km's long and we used a bit over half of it.........So first thing was the throttle no longer sticking........Yipee........Then after a couple of runs it was clear that the oil leak was cured as well.......All good......So we had a proper lambda sensor hooked up to a bung hole in the header pipe.......we were looking for figures around the 0.55 to 0.65 lambda for methanol fuels.......this was difficult to achieve.......Best was around 0.68 to 0.73 at part throttle and it would lean out to a max of 1.25 on full throttle which is way too lean and obviously dangerous.......Various attempts to raise the needle and also the float bowl gave us a full throttle best at 0.90 which is still too lean........So raising the needle and the float was improving the top end but overly rich lower down, as the bike was a bit rough on low down acceleration. We will fine tune the bottom end so I can run it in a race next weekend........this is a small track so no harm should come of it.......But we need to improve the top end quite a lot........Anyway the bike itself performed very well with no noticeable issues........It feels like a single cylinder V twin....... I actually had to adjust the clutch as it was slipping on full throttle.......It certainly gets up some descent speed rather quickly.......So all in all, it was a good run, but importantly it told us that we need to do more before even attempting to run it on a dyno and/or a longer track. [/QUOTE]
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Norvin Single race bike first run
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