mike454 Posted November 24, 2013 Report Share Posted November 24, 2013 Hey everyone i have a 4mill on alky thats giving me hell we had ring break couple months ago an it scared left cylinder so i sent cylinder to millinium got it back an now compression is way off from where it was an its also acting like its going lean spits out both pipes ive afde Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 Added more fuel to it to the point were i know it was way fat an still didnt help u can block off right carb an left side goes to smoking an running like it should an vice versa im needing help any an all will be appreciated thanks Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted November 24, 2013 Report Share Posted November 24, 2013 I am not sure of what your prob is but 1. make sure you put pistons in with the windows facing the intake , not the exhaust. 2. Do leakdown test and ck for leaks. 3. Make sure ringgaps were .010-.012 for install 4. Make sure have carbs totally apart and cleaned. 5. Swap sparkplug wires to the other side and see if a problem switches sides. 6. Check pickup gap , flywheel and key placement. Blocking off one sides carb and seeing a change in the other. Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 Pistons are in rite ring gap is 19thou compression before ring broke was 210 now left side is 180 an right is 160 new pistons an rings did leak down didnt find anything pickup is set at a business card thickness why am i getting feedback off my other cylinder when i block opposite side off? Quote Link to comment Share on other sites More sharing options...
Young Guns Racing Posted November 24, 2013 Report Share Posted November 24, 2013 .019 for ring gap seems pretty loose to me....could be experiencing "blow by"? When you broke a ring did it chunk the piston? Possibly something blocking up one of your pipes? Maybe a plug issuse - swap them over? Did you swap the plug caps over like previously stated and see if the problem follows or stays the same? Reed valves in good shape? I know its at the point of frustration but slow down a bit, take ur time and REALLY look into everything that could be the cause, persistence will pay off and you will end up fixing it. Good luck Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 Its spitting out of both Cylinders tried diff plugs wires caps diff fuel put big dumps in the carbs opened power jets all way open its not smoking like it should when you have it running no restrictions in the pipes ones im using are diff from ones i had on it when broke ring motor just went lazy when i lost that one cylinder an piston was all still there when tore it down Quote Link to comment Share on other sites More sharing options...
rockenrail Posted November 24, 2013 Report Share Posted November 24, 2013 Same brand and part number on the new pistons? Quote Link to comment Share on other sites More sharing options...
J-Madd Posted November 24, 2013 Report Share Posted November 24, 2013 Same size base gasket? Same domes? Leak down test is a must as mentioned. Quote Link to comment Share on other sites More sharing options...
dozer Posted November 24, 2013 Report Share Posted November 24, 2013 what ignition? when my dyna took a crap you could block off one pipe and the other would start running and vice versa. Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 Ya same numbers on new pistons as old ones 20 thou base an same domes has stock cdi an switched it out with dyna see if it would make difference Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 How much psi are yall shooting in the motor when doing leak down i did 8psi an didnt get any leaks Quote Link to comment Share on other sites More sharing options...
fappy'97 Posted November 24, 2013 Report Share Posted November 24, 2013 8 is PLENTY Quote Link to comment Share on other sites More sharing options...
rockenrail Posted November 24, 2013 Report Share Posted November 24, 2013 Have you checked to make sure your carbs are synched? As in slide position the same on both sides? Quote Link to comment Share on other sites More sharing options...
mike454 Posted November 24, 2013 Author Report Share Posted November 24, 2013 The motor is spittibg an popping out exhaust like it's goin lean but i have 118 main an dumps in 38mm mikunis an before this started with these dumps in it it would load up quick but now it's not Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted November 25, 2013 Report Share Posted November 25, 2013 I have not seen it but it could be possible with an intake with the crossover to have vacuum etc from one side make a difference and affect the other side. There has to be something not together right or ignition not grounded or something. Confirm that you have good alky alky will pour out of your pingle Alky will pour thru your carbs All jets are clean , drilled , flow fuel. Have you for sure confirmed that the piston windows arent facing the exhaust? I just keep asking that because that has happened many times and had symptoms such as yours right after a rebuild. Quote Link to comment Share on other sites More sharing options...
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