drbanshee Posted June 15, 2012 Report Share Posted June 15, 2012 (edited) I have a set of 34 Mikuni flatslide carbs. Does anyone know how many turns out the air screw has got to be for methanol. Thanks guys! Edited June 15, 2012 by drbanshee Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted June 16, 2012 Report Share Posted June 16, 2012 Methanol is not easy to tune if you dont know how it is different from gas. No offense because we all started from scratch but if at all possible have someone help you tune those carbs. They should have different needles, drilled dumps, drilled mains and the airscrew isnt really all that important compared to the needle setting and powerjet if it has them. Quote Link to comment Share on other sites More sharing options...
drbanshee Posted June 16, 2012 Author Report Share Posted June 16, 2012 Methanol is not easy to tune if you dont know how it is different from gas. No offense because we all started from scratch but if at all possible have someone help you tune those carbs. They should have different needles, drilled dumps, drilled mains and the airscrew isnt really all that important compared to the needle setting and powerjet if it has them. I had a guy set the carbs for methanol for me. Before on gas with the same carbs the bike was running excellent, now with methanol carbs it bogs, so I thought maybe it needs ajusted. Thanks for answering, any thoughts help. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted June 18, 2012 Report Share Posted June 18, 2012 Im assuming your setup like gearing etc are fine and you are just switching to alky. The bogging probably isnt related to the airscrew. Start the bike up , rev it a couple times pretty high and hopedully you can get it to clean out and sound good. Then hold the throttle about 1/4 or 1/3 rd way and make the motor revv a bit, hold your hand over a pipe while holding the throttle at 1/3 rd. If your hand gets very wet then lean out your needle a little. If your hand gets hot and not wet at all then go a little richer till you get the needle set where it doesnt drench your hand but isnt just dry and smokey. It should be just barely wet with maybe a little black color. Each bike is different but somewhere between being wet and dry on the needle is where most of them are happy. Quote Link to comment Share on other sites More sharing options...
Yamahopper10 Posted June 18, 2012 Report Share Posted June 18, 2012 ^ Exactly what he said. Put in in neutral so you dont burn your clutch out, and hold the throttle pretty much wide open 2-3 times (1 to 2 seconds each rev). You should hear and be able to feel the cylinders clean themselves out. Alcohol loads them up. If it doesnt clean out after 3-4 high revs then youre way rich, or could have other issues going on. Quote Link to comment Share on other sites More sharing options...
drbanshee Posted June 19, 2012 Author Report Share Posted June 19, 2012 ^ Exactly what he said. Put in in neutral so you dont burn your clutch out, and hold the throttle pretty much wide open 2-3 times (1 to 2 seconds each rev). You should hear and be able to feel the cylinders clean themselves out. Alcohol loads them up. If it doesnt clean out after 3-4 high revs then youre way rich, or could have other issues going on. Thanks for the information guys, I appreciate the replys, and I'm going to do this as soon as I get my day off, and hopefully I will get it right. Thanks again. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted June 19, 2012 Report Share Posted June 19, 2012 I keep saying im gonna do a lil alky tuning video. Just have to make sure I say its how I do it not necessarily how everyone does it. Quote Link to comment Share on other sites More sharing options...
drbanshee Posted June 20, 2012 Author Report Share Posted June 20, 2012 I keep saying im gonna do a lil alky tuning video. Just have to make sure I say its how I do it not necessarily how everyone does it. When you make one, will send me one to my email? It sure would be helpful right now. Thanks bud. Quote Link to comment Share on other sites More sharing options...
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