old 040
Pinnacle OPE Member
- Local time
- 10:07 AM
- User ID
- 590
- Joined
- Jan 18, 2016
- Messages
- 484
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- Location
- Buckeye State
The triple taper Suzuki needles were for the Keihins.Kiwioilboiler,
Mid 70's to early 80's, I can't recall if we could get more than a two taper needle for the Mikunis (Around here at least).
Some guys were hand polishing them in a drill chuck, to get desired tapers.
Did you guys get into filing the bottoms of the carb slides (round ones)?
We sometimes filed a bit off the bottom of them. Created less of an angle to the intake side and just shortened the engine side if the slide. Don't forget to re-work that notch on the engine side of the slide.
Sometimes fiddling with the height of that partial "wall" at the top of the emulsion tube also.
What we were after was that "just off idle transition" tuning.
Getting a little better throttle response in non-accelerator pump carbs. No more flat spot!
Having the pump (usually an add on, Sudco kit, I think) was just gravy.
....anyone else ever drop the danged "E" clip (from the slide needle) in the dirt cause ya were adjusting it in the field?
Anti-cav plate looks like a shark chewed it.Evinrude M2 gearcase teardown
View attachment 406128
Yes, oval slide mate.Kiwioilboiler, I forgot to ask if the Keihins still had/have that vertical oval bore?
I remember the stock Honda carbs having it.
I can imagine a triple (or progressive or curved) taper being handy in that broad transition of air flow and the bottom of the venturi probably needing a bit smaller needle to keep fuel flow to match the proportional % change of air flow vs gravity on the fuel lift, when the slide was far up.
Been many a year, so things are getting fuzzy on me though.
Die Hard!Got this 346xp back in i rebuilt it 8-10 year's ago View attachment 406685View attachment 406686
It's had a rough life View attachment 406687
View attachment 406688
I don't know what his philosophy is engraving all over itView attachment 406689
I can in the name but not stolen
That makes anyone think he stole this saw.
Lay it on the recoil side.