drap660 Posted December 7, 2009 Report Share Posted December 7, 2009 I have a 4mill stock cyl 66mm, no overide, CPI, DF3's, 17cc domes 190 compression banshee that did 105 in the 1/4 with stock carbs and 110 shortly after the 1/4. I threw in a set of 35mm PWK and didnt see much improvement but did see my gas tank go to empty 10 times faster. I guess what I am asking is, are the big carbs really worth it???? I jetted the balls out of them and got them to be perfect (no bog, straight pull through each gear). I ended up with 45pilot 152main. I am running airbox with adapters. Gearing is 16/38. Any advice will be appreciated Quote Link to comment Share on other sites More sharing options...
grandnational Posted December 7, 2009 Report Share Posted December 7, 2009 I have a 4mill stock cyl 66mm, no overide, CPI, DF3's, 17cc domes 190 compression banshee that did 105 in the 1/4 with stock carbs and 110 shortly after the 1/4. I threw in a set of 35mm PWK and didnt see much improvement but did see my gas tank go to empty 10 times faster. I guess what I am asking is, are the big carbs really worth it???? I jetted the balls out of them and got them to be perfect (no bog, straight pull through each gear). I ended up with 45pilot 152main. I am running airbox with adapters. Gearing is 16/38. Any advice will be appreciated i would think running 1/4 on stock carbs.. would be cutting close to running bowls dry during run.. if anything the pwks would give u bigger bowls than stock Quote Link to comment Share on other sites More sharing options...
drap660 Posted December 7, 2009 Author Report Share Posted December 7, 2009 i would think running 1/4 on stock carbs.. would be cutting close to running bowls dry during run.. if anything the pwks would give u bigger bowls than stock Never used to run out of gas. Stock carbs used to hold enough fuel. Quote Link to comment Share on other sites More sharing options...
RadarRacing Posted December 8, 2009 Report Share Posted December 8, 2009 You ran 110mph with stock carbs and 16/38 gearing???? Quote Link to comment Share on other sites More sharing options...
wacko2000 Posted December 8, 2009 Report Share Posted December 8, 2009 Holy shit, Im actually surprised the bike would even pull gearing like that. I seen improvements all over the board when i went from stock carbs to 30's and than to 35's Quote Link to comment Share on other sites More sharing options...
drap660 Posted December 8, 2009 Author Report Share Posted December 8, 2009 (edited) You ran 110mph with stock carbs and 16/38 gearing???? Yes. It ran 104.5 in the 1/4 and 110 top end (shortly after the 1/4). Here is a 1/4 mile pass on stock carbs (airbox on), no overide, no straps, no lockout and 16/38 gearing The issue is, I didnt see much of a diff by adding the 35mm pwk's Edited December 8, 2009 by drap660 Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted December 19, 2009 Report Share Posted December 19, 2009 So your bike is in the 11s with that mph Quote Link to comment Share on other sites More sharing options...
drap660 Posted January 13, 2010 Author Report Share Posted January 13, 2010 Any more advice... Anything Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted January 17, 2010 Report Share Posted January 17, 2010 Maybe you have reached your porting limits,your bike will spin only so much rpm no matter what carb it has.In my opinion the only way to jet for the 1/4 is make passes and check your plugs.If your chop is good your good.What are you trying to acheive?bigger carbs might not be best for your set up,ditch the air box,more air more power Quote Link to comment Share on other sites More sharing options...
sheefreak Posted January 17, 2010 Report Share Posted January 17, 2010 Are you running a lid on the airbox? Any timing? Quote Link to comment Share on other sites More sharing options...
hykrymez Posted January 18, 2010 Report Share Posted January 18, 2010 I have a 4mill stock cyl 66mm, no overide, CPI, DF3's, 17cc domes 190 compression banshee that did 105 in the 1/4 with stock carbs and 110 shortly after the 1/4. I threw in a set of 35mm PWK and didnt see much improvement but did see my gas tank go to empty 10 times faster. I guess what I am asking is, are the big carbs really worth it???? I jetted the balls out of them and got them to be perfect (no bog, straight pull through each gear). I ended up with 45pilot 152main. I am running airbox with adapters. Gearing is 16/38. Any advice will be appreciated what jetting were u using for the stock carbs? and what octain gas u running? Quote Link to comment Share on other sites More sharing options...
drap660 Posted January 19, 2010 Author Report Share Posted January 19, 2010 I am running c-12 with 6 degrees advanced timing, and I have my air lid on (for some reason it pulls better like that). My jetting on the stock carbs are stock pilots and 330 mains Quote Link to comment Share on other sites More sharing options...
J-Madd Posted January 19, 2010 Report Share Posted January 19, 2010 I have a 4mill stock cyl 66mm, no overide, CPI, DF3's, 17cc domes 190 compression banshee that did 105 in the 1/4 with stock carbs and 110 shortly after the 1/4. I threw in a set of 35mm PWK and didnt see much improvement but did see my gas tank go to empty 10 times faster. I guess what I am asking is, are the big carbs really worth it???? I jetted the balls out of them and got them to be perfect (no bog, straight pull through each gear). I ended up with 45pilot 152main. I am running airbox with adapters. Gearing is 16/38. Any advice will be appreciated Assuming 20 inch tires, your rapping that thing up to 11,000 rpms. I'm sure the tires grow at least 2 inches, so we'll say 10,500 rpms. I guess that's possible to make power until 10,500 with stock carbs ? Quote Link to comment Share on other sites More sharing options...
drap660 Posted January 19, 2010 Author Report Share Posted January 19, 2010 Assuming 20 inch tires, your rapping that thing up to 11,000 rpms. I'm sure the tires grow at least 2 inches, so we'll say 10,500 rpms. I guess that's possible to make power until 10,500 with stock carbs ? Well when I went to buy tires they only had 22's (stock's are 21's)for the front but I do have 20's in the back. I also swapped my gearing to a 17/40 and got the same exact results. It doesnt lose or gain anything. The only way its gains mph is by putting a light rider on it (150lb). It picks up almost 2 miles. 107(1/4 mile)/112(top end)and this is back on stock carbs. I put the 35's to the side for now Quote Link to comment Share on other sites More sharing options...
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