Originally Posted by timfish
Now then, i'mm sure one of you technicaly minded chappies out there could tell me which jets i should fit into my 2006 carbs ,my bonnie has 2 into 1 Arrow pipes and has had air box removed and K+N cone air filters fitted. it runs ok but now and again i get a spit back,and at full throttle it feels fuel starved. i am happy to change the jets but i don't know to which ones.i can find which to change to when fitting the arrow exhaust,also when romoving the air box , but not when both conversions are carried out,there has got to be someone out there done these conversions, and will know which jets to fit . Thanks for listening..
If the conversion is new then you will be extremely lean.
There is no right jet as there are many variables, altitude etc.
As stated you will need to see what you have in there at present.
The simple, quickest but least rewarding is to get it put on a dyno and have it tuned.
You need to check the serch engine in the forum as the jet removal is easy once you have done it once! As there will be a few strip downs unless you are lucky. Screws need to be changed (bowls). To do it right you may well benefit from some shims for the needles.
If your bike was previously converted, you need to balance the carbs and if the mileage ius up check the valve clearances. These both make a big difference to smooth running.
You might want to google up jenks guide or check in the stickyies as there is lots on carbs. There is pics of where the jets are. They have some guidlines on jets, i found they werent to far off others disagree, just goes to show the value of a dyno! At least you can get a ball park.
As for jets ideally a Keihin dealer (and the shims) cheapest option, Harley dealers they have used Keihins and are cheaper than your Local Triumph dealer.
Me on a 865 bonnie, staintunes with a totally gutted airbox and opened inlet was running 135 main in the end and good on the A/F. Bear in mind that is at sea level, with Aus quality fuel (good/ bad who knows, no ethanol!!)