Eric_The_Jew Posted December 4, 2006 Share Posted December 4, 2006 Well, I yanked the float bowls today to try and cure the rough idle my bike has had ever since I bought it. I cleaned the pilots and reassembled. However, me being the ham fisted guy that I am, I twisted off the top of one of the pilot jets (the slotted portion that the screwdriver fits into). Damn, brass is REALLY soft! It was a nice, clean break and it doesn't obstruct the hole that fuel flows into. Do any of you see a problem by just leaving it this way? The bike appears to run good now that the pilots are all clean. Also, where is a good place to buy the replacement Keihin pilots? Quote Link to comment Share on other sites More sharing options...
airborneXX Posted December 4, 2006 Share Posted December 4, 2006 I just ordered replacement main jets from Chapparal.... keihin jets Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted December 4, 2006 Author Share Posted December 4, 2006 I just ordered replacement main jets from Chapparal.... keihin jets Anyone know what number pilot jets our XX's use? (yes, I forgot to look before I put the float bowls back on :icon_wall: ) Quote Link to comment Share on other sites More sharing options...
tvking Posted December 4, 2006 Share Posted December 4, 2006 The pilot's are #42's Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted December 4, 2006 Author Share Posted December 4, 2006 UGH.....I know I sound needy guys, but I need another piece of info. If someone has a pilot jet out of the bike, could you read me the part number on the side of it? Keihin makes about 4 different series of pilot jets, and I need to make sure I get the right one in a size 42. Quote Link to comment Share on other sites More sharing options...
airborneXX Posted December 4, 2006 Share Posted December 4, 2006 You want these... series 21 slow jet Quote Link to comment Share on other sites More sharing options...
EVLXX Posted December 4, 2006 Share Posted December 4, 2006 Damn, brass is REALLY soft! It was a nice, clean break and it doesn't obstruct the hole that fuel flows into. Do any of you see a problem by just leaving it this way? The bike appears to run good now that the pilots are all clean. Yes.... that could be a huge problem. Carb jets are Bench tested for flow prior to numbering, because even tiny little changes in their surface area, mainly around the hole, can drasticly the flow characteristics. You have to change it.... period. Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted December 4, 2006 Author Share Posted December 4, 2006 You want these... series 21 slow jet Airborne, don't take this to sound like i'm doubting your knowledge, but I just want to be sure this is the right jet before I order. Keihin makes about 4 other series of pilots that look just like the "series 21" that you mentioned. See here: http://www.keihin-us.com/list.htm. Just want to clarify this before I order from Chaparral (who has some of the cheapest prices on jets, BTW!) Quote Link to comment Share on other sites More sharing options...
airborneXX Posted December 4, 2006 Share Posted December 4, 2006 You want these... series 21 slow jet Airborne, don't take this to sound like i'm doubting your knowledge, but I just want to be sure this is the right jet before I order. Keihin makes about 4 other series of pilots that look just like the "series 21" that you mentioned. See here: http://www.keihin-us.com/list.htm. Just want to clarify this before I order from Chaparral (who has some of the cheapest prices on jets, BTW!) In my manual the exploded view of the carbs has what appears to be the series 21, now looking at your link I see there are a couple of others that are similar looking. To be sure you may have to pull one and measure the length. Feel free to doubt my knowledge Quote Link to comment Share on other sites More sharing options...
Eric_The_Jew Posted December 4, 2006 Author Share Posted December 4, 2006 Thanks airborne. I will give this thread another day or two to see if anyone has a pilot lying around that they can get the part number off of. If not, I guess i'll yank the tank and float bowl and just get the part number the old fashioned way. Quote Link to comment Share on other sites More sharing options...
Pete in PA Posted December 5, 2006 Share Posted December 5, 2006 You want these... series 21 slow jet These are correct, I ordered the next bigger size the 21-45 from Chaparral. You want the 21-42. There is no part # on the jet it just says K 42. Also you need to replace it you are now sucking at a higher height in essence you've lowered your float height. Quote Link to comment Share on other sites More sharing options...
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