Yamaha Seca II Petcock Re-Build

A ten minute demo of how to rebuild the petcock on a 1995 (but same for all years) Yamaha Seca II petcock and fuel pump assembly. The rebuild kit was K&L Part Number 18-2777. You can only hear it in English, but you can watch it in any language. ;-)

Category:

Autos & Vehicles

Tags:

• How To
• Yamaha
• Seca II
• Petcock

[draco751]

Uh, I hate to break it to ya, but that's not a fuel pump on the backside of that petcock that you refer to. That's simply the vacuum controlled valve. The fuel pump is further down the line, behind the fuel filter. It is a pulse operated pump and is bolted to a bracket connected to the frame of the SECA II.

[g36cLover]

@draco751 Yeah... that assumption was from another bike I did years ago, I discovered it was just a valve after I put it back on.

[dmta]

i got a yamaha seca and its not geting fuel to the carbs im thinking i have the fuel lines crossed but i dont know if they are. can u make a vide or something about that

[g36cLover]

@dmta Here's how to check if your petcock is ok. Put the fuel switch to the "on" position, take the bigger of the two lines off of the petcock, take the smaller line off of the engine block, but leave it on the petcock. Fuel should not flow, if it does, your petcock is broken. If not, gently apply some suction on the small line, fuel should flow from the big line's socket on the petcock, but none should come out of the smal line. If any one of these conditions are not true, the petcock is bad.

[g36cLover]

@dmta As far as the line order goes: The large line from the petcock goes to the fuel filter, the other side of the filter connects to the left side inlet of the fuel pump. The right side (large) connector on the fuel pump connects to the carbs at the center inlet. One small line connects the left inlet on the engine block to the petcock and the other small line connects the right (toward center) inlet to the small inlet on the fuel pump. (The two small lines provide the pnumatic operation)

[holiwoodpa1]

This video was very helpful! I have 1996 Suzuki GSXR 1100 and I have a petcock repair kit. Is it necessary to use silicon when replacing or does that just apply for your particular motorcycle?

[g36cLover]

@holiwoodpa1 Silicon is not necessary, I use it to keep everything soft while I assemble.

[draco751]

@g36cLover No problem, I just didn't want anyone that's never opened one up before to get confused and think they fixed a fuel pump when it's a different part. I can see how it would get mixed up though as the inside diaphragms look almost the same.

[8Libertine8]

Thanks, that helped me figure out what the heck i was doing :)

[dangledog]

One of the best instructional bike vids on yt! Tks!

[Mikemanray]

Thanks! this was great; I'm currently rebuilding my 1992 Seca II Petcock for the first time.