2 into 1 35PWK Question

[chapmanmd]

Greetings.

 

On my Banshee woods quad, I have a new Keihin 35mm PWK carb from Trinity. Other engine mods include: Trinity Stage II porting, Trinity cool head with 20mm domes, 3/8" Reed Spacers, Aktiv Reeds, Dynoport Pipe, CFM Aluminum airbox with K&N, and thats about it for the engine.

 

My problem is this...

 

It starts and idles great. It runs great from the midrange up. It has a wierd bog just off idle, but if you feather the throttle, it will rev.

 

I'm new to the 2 into 1 thing and really dont know where to start fixing this issue. Any suggestions?

 

Thanks.

 

Mark Chapman

[Nightrider]

Gotta be the needle,needle postion or pilot.Did you try adjusting the mixture screws?

[chapmanmd]

Gotta be the needle,needle postion or pilot.Did you try adjusting the mixture screws?

339467[/snapback]

 

Yeah, I tried messing with the air screw. When I got the carb from Trinity, the air screw was all the way in. I started with the screw 1.5 turns out and went from there.

 

I dropped the needle in the clip and that didnt help either.

 

Any suggestions as to what pilot I should even be starting with? I did my plug checks and the main jet is good.

 

I'm close to putting the dual carbs back on...

 

Thanks.

[applpro]

Yeah, I tried messing with the air screw. When I got the carb from Trinity, the air screw was all the way in. I started with the screw 1.5 turns out and went from there.

 

I dropped the needle in the clip and that didnt help either.

 

Any suggestions as to what pilot I should even be starting with? I did my plug checks and the main jet is good.

 

I'm close to putting the dual carbs back on...

 

Thanks.

339474[/snapback]

 

I'm running the single carb (35mm) with a basically stock motor(toomey tr6 pipes) & found that the jetting out-of- the box was way off. I'm at 2850 ft elevation though, so of course your jetting will be different. The main problems were in the mid-range & I changed the pilots to the 58's & ordered a EEK needle from Carb Parts Warehouse (thanks Sredish) & it seemed to cure those problems. I'm running a 205 main.

[chapmanmd]

I'm running the single carb (35mm) with a basically stock motor(toomey tr6 pipes) & found that the jetting out-of- the box was way off.  I'm at 2850 ft elevation though, so of course your jetting will be different. The main problems were in the mid-range & I changed the pilots to the 58's & ordered a EEK needle from Carb Parts Warehouse (thanks Sredish) & it seemed to cure those problems. I'm running a 205 main.

339481[/snapback]

 

Thanks, Bro.

 

I'll check out what is in there when I get home tonight and report back.