Need some help! Please!

[canyncarvr]

Re: ' it has never run quite right..' That was with those nipples open? IF so, no wonder.

 

I looked up the PWK28 on Sudco. The angle of the diagram doesn't show that nipple..and doesn't call out a PN for it. So, no help there.

 

Considering where it is (downstream), that it sucks air, it being an injector hookup makes sense.

 

Look inside the throat and I'll bet you will find a hole in the carb directly under the brass connector.

 

..like the Banshee's predecessor..the R5/RDs both having an oil tank and pump. They had Mikunis with an oil port in exactly the same spot (not physically, but effectively).

 

That port serves no purpose in a pre-mixed Banshee (not including those with RZ motors in 'em..which probably don't have the oil pump on 'em anymore anyway), but certainly must be blocked off to prevent FOD..and a considerable too-lean problem.

 

IF this machine was run for any length of time with those ports open, chances are as close to zero as they can get that there is no resultant damage.

 

As far as this particular problem (no start),this 'compression, spark and fuel' is correct. Certainly there are variations within each that matter (like the TIMING of that spark for example), but your problem is one of the three.

 

If you will be running your machine for '..2-3 minutes' while it sits, I hope you at least have a fan in front of it.

 

Having NO idea what the current jetting setup is....with non-native carbs...it's a pretty much a crap shoot.

 

Make sure the plugs aren't wet from trying to start it. If they are new..dry them with compressed air. With the petcock 'on' TIP the machine to BOTH sides until fuel flows out the overflow hose(s) of the carbs. If the machine is cold, kick it a few times with the chokeS ON (you have two..with no choke interconnect like the OEM Mikunis) AND key off (or kill 'on' if you don't have a switch), then kick it with key-on and/or kill off.

 

The 'tipping' idea is a years old trick. For a number of reasons the floats may not be doing their job (contaminated float needle/seat for one, so they're 'stuck'). You KNOW there is fuel in the carb bowls when you see fuel coming out the overflows.

 

Good luck.