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› Keihin PWK38 Air Striker Carburetor Installation
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Keihin PWK38 Air Striker Carburetor Installation (Read 313 times)
LANCER
Serious Thumper
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Re: Keihin PWK38 Air Striker Carburetor Installati
Reply #60 -
Yesterday
at 14:40:43
Well, at least your bricks are still flesh colored.
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ThumperPaul
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Re: Keihin PWK38 Air Striker Carburetor Installati
Reply #61 -
Yesterday
at 14:51:50
LANCER wrote
on
Yesterday
at 14:40:43:
Well, at least your bricks are still flesh colored.
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ThumperPaul
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Re: Keihin PWK38 Air Striker Carburetor Installati
Reply #62 -
Today
at 05:51:39
Well, something isn’t exactly right trying to tune with the Dyna muffler…
The #32 pilot jet seems perfect. The idle is very steady at 1250-1300 rpms. This is actually an improvement.
During “roll on” testing of the main jet in 3rd and 4th gear, it stumbles or hesitates and isn’t smooth when I ease off to 7/8th throttle. Suggesting the #130 main jet is too big. I will go back down to a #128, but this is the main jet I was using with just the UNI air filter (no Dyna muffler).
Since I also moved the e-clip from the 2nd to 3rd groove on the needle, I’m wondering if this isn’t contributing to the issue as well. In the low/medium midrange, it almost feels too rich as well. I went back and forth with this when I installed the UNI filter and found I liked the 2nd groove (leaner) a little better for crisper acceleration in the midrange. But I’m always scared of being too lean in the midrange where I do 90% of normal riding.
Now I’ll be doing 1 change at a time (like I’m told).
I’m also still wondering if a different needle may be needed to get everything dialed in right.
DBM - you changed the needle on your hotrod. Ideas? I think mine is a DDJ. If I wanted to keep some of the low midrange richness (or correct mixture), but I wanted to lean out the upper end of the midrange, can you suggest a different needle? Do I need less taper? This type of advanced tuning is above my pay grade.
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ThumperPaul
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Re: Keihin PWK38 Air Striker Carburetor Installati
Reply #63 -
Today
at 09:37:54
Well… Dropping down from the #130 to #128 main virtually cleared up the issue entirely (it’s definitely noticeably better). The dilemma now though is a know a #125 will be sightly lean. And I don’t think a #126 or #127 Keihin main jet is available. I need to look.
I’m going to leave the e-clip in the middle groove for now as 1/4 - 3/4 throttle feels ok. I think it could be crisper, but I’m concerned moving the e-clip up a groove will be too lean.
I’m just gunna try some normal riding for a while and see.
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09/21/24 at 13:21:18
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