Thought I would bring this one back for a moment. I dropped the kit on my '22 Matryx khaos Slash 165 w/ qd2. Did the head, pipes, latest OL flash (one without the brake recall), and Burandts clutching. the clutching more specifically the black and purple spring secondary and standard base weight magnum force weights for the primary with 4 set screws since i am riding between 6 and 9k and the blue and pink primary spring. The thing runs great and pulls insanely hard and spot on around 8500 + -. The issue I have is a bog in the midrange between 5000 and 6000 rpms at a specific throttle position probably around 30%. SO obviously this isn't a huge issue under normal riding conditions in the trees varying the throttle etc or climbing. where is sucks in when I am decending in the deep snow or sidehilling at a constant slower speed and definitely on the 15 mile trail ride in. I feel like it either wants to do 20 miles an hour or 60. Once the power valves open the thing gets going and quick.
Been working with SLP on this and have no complaints w/ the service except the fact that I still have the issue. They are pretty certain it's engine load and/or cold pipe which I don't disagree because when I really rail on it it runs great until a minute later things cool off and it goes back to midrange bog. when I say rail on it I mean multiple hard pulls WOT in a row.
1) tried adding weight to the primary - just takes rpms away at top end. currently at SLPs recommended 65.5g
2) check all spark plug connections
3) new plugs
4) new belt
5) track tension and belt deflection
6) I pulled the head wondering if that was the issue and the stock one did the same so the power domes went back on
7) have tried lots of different helix combos 60, 62, 64 initial and 42 secondary angle
8) recorded engine performance and SLP saw nothing out of the ordinary with fuel pressure or anything on the spreadsheet except cooler pipes
9) had the exhaust valves re learned
10) no exhaust leaks anywhere
11) good fuel with recommended lucas octane boost.
12) had the TPS checked
I'm running out of ideas here! Next thing SLP recommends is going to the QD1 for higher gearing and my other thought was to wrap the pipes (which SLP recommends against). I have seen quite a few folks on here who have done that it just surprises me that some have no issue at all or don't notice this midrange issue as much as I do. Maybe I am being too picky?!
