menace

ok so when going full throttle for about 15 seconds or longer I let off the gas at 9 to 10 thousand rpms i will apply just enough throttle to hold speed when the bike gets to about cruising speed at say 85 mph and just at 5500 to 6100 rpms i will have a two bump delay or hickup whatever. i have not noticed it at lower speeds or at shorter intervals of wide open throttle so it seems to only do it when i have it at wide open for more than 15 seconds then it will do it. i have 48 pilots slip ons and the air fuel screws at 2.5 out idle set at 1200.

xeris

If you are experiencing a lot of decel when backing off on the throttle, don't know what gear you're in, it may be the carb vent hose issue. ?

menace

F

AlanS

I agree with menace: 'F'.

menace

thanks for your input guys. i am not a novice with carb tuning on the other hand i am very much a novice with a vtwin. in my opinion i think it is that i have the air fuel mixture screws turned out too far or its a needle setting issue since it only happens just after wide the **** open throttle at high speeds. normally with an inline 4 i would not think it to be a/f screws but this thing is funny because it has only the two cylinders and huge carbs also i never in a million years would i have expected to gain so much more of an increase in power by changing just the pilot jets i went to a 48 and it changed everything in a good way for wide open power and smoother throttle position while maintaning speed but i also didnt have this blip b4 i put in the pilots and it seems to have an odd reaction on cold starts that it did not have b4 it likes to die after running for 30 seconds and does not start right up it takes about 3 to 5 turns of the crank and it did not b4. after the bike sits in the sun and the temp gauge reads 100 degrees b4 even starting it i have no issues but when i start it in the morning when its cold it will die after running 30 seconds i think that most of the starting issue is from the carb sinc being off a bit also a/f screw settings because the idle sometimes fluxuates just a smidge. with a four cylinder you dont really have to be as precise they react differently plus it has 2 extra cylinders so your tune can be off just a bit and not notice a thing. i have replaced both the little foam filters in the corner of the air box so i wouldnt think it to be that. do you guys possibly think that the needles could be damaged or worn at the tip 33,000 miles are on it. we all know its a huge pain in the *** to install the slides for the carbs maybe i messed one of the tips up while doing this or maybe its just that they are not at the right height. any feed back is welcome thanks for your reading and forgive me for the grammer and puncuation.
Dustin