92KK 84WW Olaf
Life time member
Number of posts : 7954
Dai wrote:Check the timing (the position of the HES). If it's too far advanced it might spit fuel backwards, but what you say also suggests you are going to need to replace the z-tube, all three vacuum covers (cyls 1- 3), the vacuum tube (cyl 4), inlet rubbers and manifold rubbers.
If it is 85 you may have a vacuum sensor, another vacuum tube goes from No 1 around the front of the airbox, the sensor is mounted beside the fuel pressure regulator. Replace it with a cap [vacuum cover] same as 1-3.
But I am a devil and going to say replace the fuel lines because it could have been coming from a cracked line as they are all under pressure and bouncing off the air box.
Does the bike have the CA tank venting system? ........ I am not familiar with it but I have an idea the gas tank vents into the air box....possible the pipe inside the tank is set damage and too low and its acting as an 'overflow'
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1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles.
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles
Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500