scottt07 Posted December 7, 2010 Report Posted December 7, 2010 I recently bought two banshee's from a lady divorcing her husband.. (Gotta love craigslist.. : ) A 1997 and a 1987 She gave me the two shee's for a killer deal but she didnt know hardly anything about them..All she knew was the 97 was ported and had engine work done and they both ran on pump gas... Anyhow... the 1997 started up and was running good after cleaning the carbs but was running basically titts maybee a little lean anyhow I took the carbon fiber reeds it had out and put in the vforce reed cages and reeds (new yamaha gaskets) I was at a 290 main's and 25 pilot when I bought it and since changing to the vforce Ive worked my way upto 360's! and a 27.5 pilot..Needle a second slot from the bottom RUNS LIKE SH** and still lean... Its seems to be running super fat as if it was too rich but hardly any white smoke. and the plugs almost near white after a plug chop.. Ive done a leak test with a water bottle no air leaks by the way im running 91 octane (highest I can get at the pump in socal..) with Yamalube almost 36:1 WTF!!!! I should be fouling plugs... The 1987 came with a stock motor with bills pipes and some 40MM mikuni fat slides...THIS GUY MUST HAVE BEEN SMOKED OUT!! I found some stock carbs. and now its running like a champ... I still have the 40mm carbs It was thinking of trying them on the 97 Any suggestions?????? Thanks for taking time to read my post Quote
06specialedition Posted December 7, 2010 Report Posted December 7, 2010 I recently bought two banshee's from a lady divorcing her husband.. (Gotta love craigslist.. : ) A 1997 and a 1987 She gave me the two shee's for a killer deal but she didnt know hardly anything about them..All she knew was the 97 was ported and had engine work done and they both ran on pump gas... Anyhow... the 1997 started up and was running good after cleaning the carbs but was running basically titts maybee a little lean anyhow I took the carbon fiber reeds it had out and put in the vforce reed cages and reeds (new yamaha gaskets) I was at a 290 main's and 25 pilot when I bought it and since changing to the vforce Ive worked my way upto 360's! and a 27.5 pilot..Needle a second slot from the bottom RUNS LIKE SH** and still lean... Its seems to be running super fat as if it was too rich but hardly any white smoke. and the plugs almost near white after a plug chop.. Ive done a leak test with a water bottle no air leaks by the way im running 91 octane (highest I can get at the pump in socal..) with Yamalube almost 36:1 WTF!!!! I should be fouling plugs... The 1987 came with a stock motor with bills pipes and some 40MM mikuni fat slides...THIS GUY MUST HAVE BEEN SMOKED OUT!! I found some stock carbs. and now its running like a champ... I still have the 40mm carbs It was thinking of trying them on the 97 Any suggestions?????? Thanks for taking time to read my post Have you done a leakdown on the '97 shee? Mite be a serious air leak..... IMHO I wouldn't put the 40's on the '97. Those carbs should be on a pretty large built bike. Quote
Jereme6655 Posted December 7, 2010 Report Posted December 7, 2010 ok....so how are you talking about doin a leakdown test using a waterbottle??? does it have stock carbs on it? are you sure the choke tube between the carbs is in place? Quote
scottt07 Posted December 7, 2010 Author Report Posted December 7, 2010 A leak down test is when u start the bike and spray all around the head ans carb boots to see if u see any bubbling or see if it sucks any water in.. It has stock carbs it has the choke air tube connected also... Ive rebuilt two banshees and over 15 Blasters so im ive gone through all the ideas i could think of Quote
scottt07 Posted December 7, 2010 Author Report Posted December 7, 2010 I did the leak down test... it was fine..I have all new hose clamps (good ones) new gaskets the intake boots are almost brand new no cracks or splits Quote
hercalmighty Posted December 7, 2010 Report Posted December 7, 2010 You could have a crank seal going. The best way to go is use a leak down tester. Quote
scottt07 Posted December 8, 2010 Author Report Posted December 8, 2010 how do i test it in that area? just take off the stator cover? And the other side has the clutch.. A leak down test is when You spray water in the affected area when it running??? Just asking I hard myy friend use this term and thats how he described it... Quote
scottt07 Posted December 8, 2010 Author Report Posted December 8, 2010 at this point Im almost gonna just put it back to the 290's or even try 300's and put my regular carbon reeds in.. Im fed up! ive had the carbs off over 10 times this week!! Ive checked the floatbowl level its right on... Quote
hercalmighty Posted December 8, 2010 Report Posted December 8, 2010 The water bottle thing is one way to do a quick check but the best way to do it is to use a leak down tester. What you do is use the tester and put 6psi into the motor and see if it holds the pressure for 6 minutes. It will test the whole motor. The tester cost about $20 to build and only takes a few minutes to put together. Quote
scottt07 Posted December 8, 2010 Author Report Posted December 8, 2010 oh.. ok. do u know of any links that i can use to make one? will the tester screw into both spark plug holes? Quote
jasons Posted December 8, 2010 Report Posted December 8, 2010 oh.. ok. do u know of any links that i can use to make one? will the tester screw into both spark plug holes? http://bansheehq.com/forums/index.php?showtopic=110585 Quote
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