slag_350300 Posted July 25, 2011 Report Posted July 25, 2011 I have 34mm PJ carbs with 162 main jets, 58 pilot and 1 1/2 turns out on the airscrew. I run 50/50 pump and av gas and ride on sea level. Im going from a stock stroke crank wiht ported cylinders to a 4 mil stroker crank and 65mm stock cylinders ported. Am I going to need to rejet or should it be in the same ballpark? Thanks in advance Quote
12 0 Clock P I M P Posted July 25, 2011 Report Posted July 25, 2011 I have 34mm PJ carbs with 162 main jets, 58 pilot and 1 1/2 turns out on the airscrew. I run 50/50 pump and av gas and ride on sea level. Im going from a stock stroke crank wiht ported cylinders to a 4 mil stroker crank and 65mm stock cylinders ported. Am I going to need to rejet or should it be in the same ballpark? Thanks in advance The carbs are OK and plenty for a ported 4 mil but you will need to re jet whenever you change especially to a stroker. Quote
camatv Posted July 26, 2011 Report Posted July 26, 2011 put it all together with clean carbs adn go from there. you might be suprised.. Quote
coryv4 Posted July 26, 2011 Report Posted July 26, 2011 put it all together with clean carbs adn go from there. you might be suprised.. you might also need to get your cylinders reported Quote
slag_350300 Posted July 26, 2011 Author Report Posted July 26, 2011 you might also need to get your cylinders reported Ive got a 4 mil dune port on the cylinders I shouldnt need to change much. I was just wondering about the jetting I will just have to put it all together and see how it runs. I cleaned the carbs out yesterday and everything is on the work bench in order ready for assembly Im just waiting on a 4 mil crank and 4 mil ported cylinders I purchased from a member on here it has been close to 3 1/2 weeks and I still havent gotten it. Quote
coryv4 Posted July 26, 2011 Report Posted July 26, 2011 Ive got a 4 mil dune port on the cylinders I shouldnt need to change much. I was just wondering about the jetting I will just have to put it all together and see how it runs. I cleaned the carbs out yesterday and everything is on the work bench in order ready for assembly Im just waiting on a 4 mil crank and 4 mil ported cylinders I purchased from a member on here it has been close to 3 1/2 weeks and I still havent gotten it. oh well if they are ported for a 4 mil then if all you are adding is the 4 mil and nothing else try 4 jets bigger and go from ther Quote
06specialedition Posted July 26, 2011 Report Posted July 26, 2011 Ive got a 4 mil dune port on the cylinders I shouldnt need to change much. I was just wondering about the jetting I will just have to put it all together and see how it runs. I cleaned the carbs out yesterday and everything is on the work bench in order ready for assembly Im just waiting on a 4 mil crank and 4 mil ported cylinders I purchased from a member on here it has been close to 3 1/2 weeks and I still havent gotten it. 3 1/2 weeks? Quote
slag_350300 Posted July 26, 2011 Author Report Posted July 26, 2011 4 jets bigger? just the main jet? or pilot too? I can see they make a 162 then 165, 168,170, 172. are you referring to a 165 or 4 jets up from the 162?which would be a 172? Quote
slag_350300 Posted August 7, 2011 Author Report Posted August 7, 2011 I got my 4 mil stuff installed and went on a break in ride yesterday. It appeared to be lean so I ended up going with a 165 main jet and it pulls hard in the mid but on the top it cuts out. I tried a 162 and not much improvement. I messed with teh needle clip position went 2 slots up from the bottom all the way up to the top position and I couldnt get it dialed in. I may have over oiled my filter so I do need to clean and reoil that and try it but what else could I try? Ive got new plugs, new reeds, new pistons, new pingel, carbs are clean, I need to buy a variety pack of pilot jets and mess with those. It seems like it chokes up when im off idle cruising around and for the best improved excelleration I gotta rev it up and drop the clutch then it screams. Maybe Im not used to the lack of low end coming from a trail port? but something does seem out of tune Quote
slag_350300 Posted August 7, 2011 Author Report Posted August 7, 2011 Does anyone have a variety pack of pilot jets theyd want to sell? I have a #58 in there so around that range Quote
volcrano Posted August 7, 2011 Report Posted August 7, 2011 Does anyone have a variety pack of pilot jets theyd want to sell? I have a #58 in there so around that range ask the guy u bought the set up from how he was jetted. Quote
slag_350300 Posted August 7, 2011 Author Report Posted August 7, 2011 I'm at sea level I'm pretty sure he was at a different elevation Quote
slag_350300 Posted August 7, 2011 Author Report Posted August 7, 2011 Ive been reading the "what jets are you using" thread and found a few guys with 34mm PJ carbs at sea level that have pilot jets in the range of 48-52 and Im up at 58. Not sure why its up that far but when I had my older engine with a national port job the thing ran awesome. Ive got a shopping basket full of jets from jetsrus.com and Ill go from there. Keep ya posted thanks for replies Quote
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