dkripper Posted April 27, 2009 Report Posted April 27, 2009 i just bought a shee its a 97 bored out to a 440. its runing a stock head with milled domes. and stock carbs. idk what there jetted to but it boggs when i open it up and it feels like its not fully wineding out in powerband. also it overheats on me and it seems like my left cylinder isnt fireing unless its like 1/4 Throttle or less whats going on with this thing???????????? Quote
BigDan789 Posted April 27, 2009 Report Posted April 27, 2009 i just bought a 99 and it was doin that cuz i was runnin 32:1 fuel and oil mixture...so i leaned it out and now i run 40:1 and it runs perfect Quote
278 Posted April 27, 2009 Report Posted April 27, 2009 check the rubber cross over tube between the carbs check for air leaks and check your plugs, and caps. Just start with one thing go down the list man Quote
2001Stroker Posted April 27, 2009 Report Posted April 27, 2009 bored out to a 440. I assume it's a stroker motor. Check to make sure your carbs are sync'd. Quote
dkripper Posted April 28, 2009 Author Report Posted April 28, 2009 i just bought a 99 and it was doin that cuz i was runnin 32:1 fuel and oil mixture...so i leaned it out and now i run 40:1 and it runs perfect realy? mabe it is something dumb like that thanks Quote
dkripper Posted April 28, 2009 Author Report Posted April 28, 2009 I assume it's a stroker motor. Check to make sure your carbs are sync'd. the guy i bought it off of only told me of the bore and i checked to be sure and it is but i didnt check the crank so i can only gess as of now but i dont even think its posable to bore it that far with out stroking it. plus the guy did say befor he had the motor redone he blew the crank so im gessing yes Quote
mark101180 Posted April 28, 2009 Report Posted April 28, 2009 (edited) the guy i bought it off of only told me of the bore and i checked to be sure and it is but i didnt check the crank so i can only gess as of now but i dont even think its posable to bore it that far with out stroking it. plus the guy did say befor he had the motor redone he blew the crank so im gessing yes how did you check the displacement without knowing the stroke length. and you did have the head off to mic the bore as a matter of fact for you to add 90 cc if my math is correct you would have to over bore th jug roughly 5.5 mm wich would be something like .130 over im not positive but i dont think you can do that with stock jugs the thing has to be a stroker or the guy lied to you Edited April 28, 2009 by mark101180 Quote
serius4play Posted April 28, 2009 Report Posted April 28, 2009 thats just plain dumb to even try and go that far with stock jugs! im prety shure at like .110over your cyl walls are like paper thin...... it has to be a stroker. pull ur pistons out and meshure the cyl. Quote
smokethis Posted April 29, 2009 Report Posted April 29, 2009 how did you check the displacement without knowing the stroke length. and you did have the head off to mic the bore as a matter of fact for you to add 90 cc if my math is correct you would have to over bore th jug roughly 5.5 mm wich would be something like .130 over im not positive but i dont think you can do that with stock jugs the thing has to be a stroker or the guy lied to you It is possible to check both bore and stroke without removing the heads, if that is how he did it who knows but him, but it is possible using the right tools to check the bore and checking the stoke can be done with a chopstick then do the math and know the displacement. Or I could be talking out of my ass I like the sound of my own voice. Quote
sleeper06 Posted April 29, 2009 Report Posted April 29, 2009 Check the bore sixe with a mic and get back,there probably sleeved cylinders big bore Quote
dkripper Posted April 29, 2009 Author Report Posted April 29, 2009 thats just plain dumb to even try and go that far with stock jugs! im prety shure at like .110over your cyl walls are like paper thin...... it has to be a stroker. pull ur pistons out and meshure the cyl. it is posable and the kit to do it is avalable the guy just resently showed me the sales reseats for the rebuild and a case mod and cylander boring is requiered and it defenently has the big bore sleaves pressed in. Quote
swrbansheeboy Posted April 29, 2009 Report Posted April 29, 2009 from what i can see to get a 440 you need a 7mm stroker and 68mm pistons... jj&a racing sells a stroke guage that threads into the plug hole but it's $230... http://www.jjandaracing.com/ it's under "other atv stuff", 3'rd item down.... Quote
klemet banshee Posted April 29, 2009 Report Posted April 29, 2009 Well first you gotta get rid of the pos 400ex in your shed :laugh: bet ya it will run like new!!!! second you gotta sell me those front shocks you still have the curse!!!! Quote
klemet banshee Posted April 29, 2009 Report Posted April 29, 2009 Well first you gotta get rid of the pos 400ex in your shed :laugh: bet ya it will run like new!!!! second you gotta sell me those front shocks you still have the curse!!!! Quote
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