ryskie22 Posted August 19, 2008 Report Share Posted August 19, 2008 i have had mixed input on fuel and on how to check the compression, i have 19cc domes in a prodesign cool head on a 350 with a hotrod crank, advanced 4 degrees, 33 keihn pwk carbs jetted at 165 mains and 48 pilots, also the tops of the jugs were surfaced due to imprefections, now my queston is that should i be running straight 110 or 50/50 mix with pump or straight pump gas? ive checked compression many different ways, i really dont know what the proper way is but here it goes, i first kicked the shit out of it and it never got over 155,now if i check one cylinder while the other is running it has 180 to185 idleing of course, and the cylinders are even and this is a fresh topend. so what is the proper way is it that i cant kick it fast enough? from the info ive found this should have 180, oh and i am at sea leval to 500 feet, thanks for everyones help on this its been a question ive had for a long time. Quote Link to comment Share on other sites More sharing options...
LiftdT4R Posted August 19, 2008 Report Share Posted August 19, 2008 How did you manage to do a compression test while one cylinder was running?!?!?!?!?! You should take the plug out of the cylinder you testing, turn the bike off, and the gas off, screw in the compression tester, and kick it until the gauge stops going up. Depending on your elevation check out http://www.nossmachine.com/banshee_heads.htm and the chart about half way down tells you about what compression you should be at. 155 seems low for 19cc domes, but you can check on that page and make sure. Also, do your compression check again, the right way. Usually with 19cc domes your going to be on pump gas though. Quote Link to comment Share on other sites More sharing options...
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