yamaha GP1200 carburation problem

[Inflp]

I will try to put the original needle and seat and see if they stop leaking

[Jonesyfxr]

The needle and seat was likely changed for performance reasons.

[Inflp]

Problem detected, it turns out that the needle seat hole did not correspond to the one indicated in the manual, the hole is much larger than specified, some previous owner changed this, thank you very much everyone for the help

[Inflp]

Thanks, I'll apply the advice, check that the height of the arm is flat, change the spring and put the popoff pressure at 50 psi and try again

[Myself]

Increase popoff to around 50psi.....30 is too low. Also check that the needle arm lever is flat with the carb body. If it's sticking up too high the diaphragm rests on it, holding it open.

[Inflp]

Thanks. That's why I'm stumped, I've checked that many times and no leaks, the needle and seat hold 20 psi pressure for several minutes and the pop-off pressure is around 30 psi on all three carbs, believe me I've checked this many times

[Myself]

Thanks, they seep inside the throats, there is a constant drip in the small cylinder corresponding to the jet of high

OK.......needle seat OR seat o'ring issue is normally the cause.

[Inflp]

Carbs are leaking INside the throats......or OUTside into the hull? Those really like about a 50psi popoff.

Thanks, they seep inside the throats, there is a constant drip in the small cylinder corresponding to the jet of high

[Inflp]

??reemplaz?? ese peque??o dedo de pl?ístico transparente dentro del carburador?

Thank you, I do not understand what plastic you mean, sorry my English is not very good

[Inflp]

Thanks, I'll apply the tips and try again

[Myself]

Carbs are leaking INside the throats......or OUTside into the hull? Those really like about a 50psi popoff.

[WFO]

30 psi is way too low. use the 115 gram spring on those

98 GP1200 is 65U motor and SBN carbs

[Jonesyfxr]

did you replace that small clear plastic finger inside the carb?

[Inflp]

Thanks. That's why I'm stumped, I've checked that many times and no leaks, the needle and seat hold 20 psi pressure for several minutes and the pop-off pressure is around 30 psi on all three carbs, believe me I've checked this many times

[Jonesyfxr]

If there's a constant drip the needle and seat is leaking.