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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chewed up push rod and vexing oil leak
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<blockquote data-quote="Howard" data-source="post: 23894" data-attributes="member: 271"><p>OK maybe the white smoke is condensate (water) from sitting all week or could it be a too lean mixture. Still the exhaust does not smell like burning oil... 240 mains eh? Are you running air filters? Is your muffler restrictive at all? If you have clean plugs with 240's then my 210's cant be to big...with out air filters and no back pressure in the muffler to speak of</p><p> </p><p>Eric</p><p> </p><p>I was running with air filters on 230 jets, but they were showing signs of being slightly too weak. Hard to tell with fuel here, plug chops don't seem to be relative anymore. My silencer is more restrictive than a straight through pipe, but still quite open. I'd expect to <u>go up at least</u> one main jet size if I fitted a pipe instead. I've recently changed to long bellmouths instead of filters (never liked them) and gone up to 240 main jets. I haven't done many miles due to other problems, but I wouldn't be surprised if I needed to go up to 260.</p><p> </p><p>You seem to be confused about carb settings have a read of a few internet sites like this one. <a href="http://www.jba.bc.ca/Bushmans%20Carb%20Tuning.html" target="_blank">http://www.jba.bc.ca/Bushmans Carb Tuning.html</a> </p><p> </p><p>There are lots of reasons for popping in the exhaust on overrun, but if you're playng with carb settings, you'll most likely find the pilot air screw is screwed out too far (weak) - turn it in a 1/4 turn at a time. </p><p> </p><p>I started with 240 mains, 107 needle jet, #30 pilot jet, No 3 slide, needle clip in middle groove, pilot screw turned out 1 1/4 turns. No 2 engines are the same, and I'm sure there are lots of alternatives, but these work for me.</p><p> </p><p>H</p><p> </p><p>ps I'd stay clear of "hard fast runs" for now. If you're running as weak as I suspect, it could be quite a few dollars before your next hard fast run!</p></blockquote><p></p>
[QUOTE="Howard, post: 23894, member: 271"] OK maybe the white smoke is condensate (water) from sitting all week or could it be a too lean mixture. Still the exhaust does not smell like burning oil... 240 mains eh? Are you running air filters? Is your muffler restrictive at all? If you have clean plugs with 240's then my 210's cant be to big...with out air filters and no back pressure in the muffler to speak of Eric I was running with air filters on 230 jets, but they were showing signs of being slightly too weak. Hard to tell with fuel here, plug chops don't seem to be relative anymore. My silencer is more restrictive than a straight through pipe, but still quite open. I'd expect to [U]go up at least[/U] one main jet size if I fitted a pipe instead. I've recently changed to long bellmouths instead of filters (never liked them) and gone up to 240 main jets. I haven't done many miles due to other problems, but I wouldn't be surprised if I needed to go up to 260. You seem to be confused about carb settings have a read of a few internet sites like this one. [URL]http://www.jba.bc.ca/Bushmans%20Carb%20Tuning.html[/URL] There are lots of reasons for popping in the exhaust on overrun, but if you're playng with carb settings, you'll most likely find the pilot air screw is screwed out too far (weak) - turn it in a 1/4 turn at a time. I started with 240 mains, 107 needle jet, #30 pilot jet, No 3 slide, needle clip in middle groove, pilot screw turned out 1 1/4 turns. No 2 engines are the same, and I'm sure there are lots of alternatives, but these work for me. H ps I'd stay clear of "hard fast runs" for now. If you're running as weak as I suspect, it could be quite a few dollars before your next hard fast run! [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Chewed up push rod and vexing oil leak
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