View Full Version : what size
hardkoratvmxr
02-16-2005, 07:04 PM
i just got an hmf slip on for my 300ex and it says go up 5 sizes on the main jet, well the thing is i dotn know what my stock size is so if you could let me know what 4, 5, and 6, sizes up will be from stock thanx.
44oEX
02-17-2005, 06:18 AM
stock is 118 -122 I don't remember for sure. but for a pipe and filter a 128 run great normaly. I would start there and see how it runs. then go from there.
hardkoratvmxr
02-17-2005, 05:55 PM
i need the sizes though
44oEX
02-17-2005, 06:08 PM
why???
just put in a 128
hardkoratvmxr
02-17-2005, 06:09 PM
will that size be ok with a k&n and open airbox
Dannys400ex
02-17-2005, 06:10 PM
just put it in and try it.
44oEX
02-17-2005, 06:20 PM
yes. try it if it's lean cause of your conditions ( temp alavation...) then go bigger from there
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