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ive got a problem that drives me crazy and i cant find a solution for it!
it starts ok with a cold or warm engine. a litlle lazzy when warm,it seems to stay 2-3 second to rise to idle! not always! it works better when the engine is cold. with engine warm, somethimes when i blip the throttle,it go under idle and return ,rarely the engine stall. when stiil not warm enough idle is solid. Warm idle is a little bouncy, maybe 50-100 rev. i use carbtune to sync the carbs.
i thought the mixture was rich!.ive modified the floats from 14mm to 15,5mm, pilot screw from 1 turn to 3 1/2 turns and still the same thing!
it was doing the same thing,sometimes it was going under idle and return,rarely the engine was stalling
pilot screw isnt helping at all ,closed or open it all happens the same.
ill write down the latest modifications,the problem is still there
ive cleaned the carburators but they've never been left 24hrs in a cleaning solution, they've only been sprayed with cleaning spray and compressed air.
ive changed the orings from the carburators ,the rubber tap from the pilot jet,from the emulsion tubes,from the floats, pilot screw, from the syncronizing port.
what i've check and replace until now:
-all o-ring from carbs
-i tried floats from 14mm to 15,5mm thinking it's rich at idle (now i bet it's a little air leak)
-i tried pilot screw from 1 1/2 turns to 3 1/2 turns (those was changing idle a little bit, but the issue was still there)
-emulsion tubes factory pro nickel plated
-factory pro TI JET KIT
-sealed airbox boots with RTV
-new o-ring between carbs and cylinder head
-new stock air filter champion
-new spark plugs
-cut an inch of plug wires and put back spark plug boots
-stock headers a little modified by me (4 in 1 and welds grind out) with a carbon muffler MIVV from a gsxr srad
-valve clearance check
-compression on four cylinders is 212 psi (manual says between 142-213 psi)
-12V (maybe more) at ingnition coils
-good battery(one year old stock yuasa)
-good charging 14,6 V
-choke lever and cable and everything check
-valve cover hose, drain airbox hose, vaccum hose to petcock....
-rebuild petcock
what is wrong with it?
last thing that i will do is soak the carbs for 12 hours! please give me ideas!
it starts ok with a cold or warm engine. a litlle lazzy when warm,it seems to stay 2-3 second to rise to idle! not always! it works better when the engine is cold. with engine warm, somethimes when i blip the throttle,it go under idle and return ,rarely the engine stall. when stiil not warm enough idle is solid. Warm idle is a little bouncy, maybe 50-100 rev. i use carbtune to sync the carbs.
i thought the mixture was rich!.ive modified the floats from 14mm to 15,5mm, pilot screw from 1 turn to 3 1/2 turns and still the same thing!
it was doing the same thing,sometimes it was going under idle and return,rarely the engine was stalling
pilot screw isnt helping at all ,closed or open it all happens the same.
ill write down the latest modifications,the problem is still there
ive cleaned the carburators but they've never been left 24hrs in a cleaning solution, they've only been sprayed with cleaning spray and compressed air.
ive changed the orings from the carburators ,the rubber tap from the pilot jet,from the emulsion tubes,from the floats, pilot screw, from the syncronizing port.
what i've check and replace until now:
-all o-ring from carbs
-i tried floats from 14mm to 15,5mm thinking it's rich at idle (now i bet it's a little air leak)
-i tried pilot screw from 1 1/2 turns to 3 1/2 turns (those was changing idle a little bit, but the issue was still there)
-emulsion tubes factory pro nickel plated
-factory pro TI JET KIT
-sealed airbox boots with RTV
-new o-ring between carbs and cylinder head
-new stock air filter champion
-new spark plugs
-cut an inch of plug wires and put back spark plug boots
-stock headers a little modified by me (4 in 1 and welds grind out) with a carbon muffler MIVV from a gsxr srad
-valve clearance check
-compression on four cylinders is 212 psi (manual says between 142-213 psi)
-12V (maybe more) at ingnition coils
-good battery(one year old stock yuasa)
-good charging 14,6 V
-choke lever and cable and everything check
-valve cover hose, drain airbox hose, vaccum hose to petcock....
-rebuild petcock
what is wrong with it?
last thing that i will do is soak the carbs for 12 hours! please give me ideas!
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