Unusual setting
Hello Guys,
I own a 2008 EC300, Stock Motor, Gnarly Pipe and FMF Turbinecore2. New Spark plug 1 size hotter BR7EG.
With the Smartcarb (38mm Billet) the idle is a problem.
With standard Setting(as delivered and documented in manual) Valve height2mm and needle+Slide/Rod length 99,1mm (3,901") I have a return from open Throttle with normal (desired) idle rpm, but after 1 or 2 secounds it drops and soon Motor stalls. I tried to lean the rod, but the high idle always sooner or later drops to stall.
I now had the following strategy: Make the Carb richer so rpm drops fast after open throttle and enhance idle (gap).
This leaves me at standard Slide/rod length 99,1mm but a stable return to idle. Only issue is, that idle gap is 3,7mm. Far away from the recommended 2mm(+-0,5mm).
Has anyone made similar experience?
By the way, my manual says the carb has a 35HiFlo Needle+seat. What does that mean?
Important for me is a very good consistent and predictable smooth power delivery from bottom, as I do X-Training with a lot slow tricky stuff. Ideally engine would behave like my 250TXT GasGAs trials bike.
In the EC300 my Keihin delivers here after endless mods(see below, except for stalling on steep descent).
Best regards,
Erhard
P.S.:
I am convinced i have no issues with air leaks, broken Membranes or such. The Motor runs good, switching back to Keihin PWK 38(slide9, N1EG clip2, Main 168, Idle 40, Idle screw 1,5T out, warmer spark Plug-important!). Only backdraw of Keihin is a delayed transition onto Pipe (Powervalve opening). In tricky Terrain it appears Keihin delivers softer Power(better than SC). Keihin tends to stall at steep descends.
I had endless tuning on the Keihin, starting with JD kit. Now I tried a #9Slide and feel to have the best combination now. #7 never was totally convincing. With N1ef/slide#7 it was always loading up in slow sections...endless as sayed. SC was better from out of the box, if only it idled...