Posts
357
Joined
10/27/2017
Location
San Diego, CA
US
sdhuskyrider
11/5/2017 8:09am
11/5/2017 8:09am
Edited Date/Time
11/23/2020 9:19am
Has anyone nailed jetting specs for the 17' Huskatoom TC250? I have been hitting Pala in Socal which is about 500' above sea level and temps are pretty steady at 70*F right now. Bike is blubbery down low but crisp mid and up. I checked my float level which is 6-7mm per Mikuni spec and I dropped the pilot from 42.5 to 40 but it didn't do much. Plug reading was dark and sooty at end of the day. Air screw not doing very much. Going to drop to a 37.5 pilot today and up the main to 450 to make up for it. I have read some folks adjusting float to 8-9mm. Does that work? I have also read about correcting squish which seems to help with jetting issues down low. Reed cage looks good btw.
37.5 pilot, rest oem bike runs like a raped ape
will post pic of plug for reference
i have run as low as 32.5 pilot, guys I know @ track run 27.5 pilot w/stock needle and main, again bikes run great
The Shop
60:1 motorex
Mine never ran correctly with these same same settings... i even went down to 32.5
I'm at sea level too/east coast
The 17 KT/HVA seem to be a hit or miss for jetting
Almost threw the towel with my TC until I ditched the TMX for a Keihin PWK. Solved all jetting issues
Best TMX setup was either 37.5 pilot/Stock needle clip 1 and stock main or JD blue #3 , 32.5 PJ and 420 main
My complains with the TMX was the lack of consistency and some rich/lean spots
Any weather change (temp/humidity) and it would run like crap
Opyguy, mind sharing your PV settings ? (Spring color and how many turns in form fully backed out)
I ran the red at 1-3/4 for a while and now back to yellow at 1-1/4
50:1 Maxima K2 with non ethanol fuel
when I ran the jd kit I had a ridiculous hanging idle, even w/blue needle #4, went back to stock w/37.5 pilot.\
I RUN YELLOW POWERVALVE 2 TURNS IN ON HARDPACK AND 2.5 IN ON SAND, if I run PV too far out in sand the engine bogs. Also run a 304 silencer (not shorty).
Adjust float.
Check reeds for sealing (may not really matter anyways).
Have 0.020" cut off of head.
I have the blue JD needle (#3), 420 main, and 27.5 pilot.
Bike runs great on 93 octane mixed at 32:1.
The head mod really cleaned things up for me.
I found that with all springs adding more than 2 ~2 1/2 turns never worked well. Bike would either bog down low or hit like a mule at the worst moment .
Between flush and 1-3/4 in works best for me (but that’s just me , practice wonder only ..)
Now that I don’t have to spend hours with jets and needles , I can fine tune with the PV and will also try soon a flywheel weight
One thIng I noticed is that even going to a 49 rear sprocket, the bike works best when short shifted.
Pit Row
Has anyone tried an RK Tek head? I saw some pics floating around and it seems the OEM KTM/Husky head has almost no squish band. Not the best design.
not sure about the rk head but If its like the slavens, I think its designed to accommodate people who ride in higher altitudes like 8000+ft. don't quote me on that though.
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