Help jetting quad for HMF

[black400ex611]

Man i need some help on jetting this quad...:( I have a hmf slip on and the web site calls for a 175 main and 3.5 turns on fuel air mix and 1st clip on needle... I wanna run without a airbox and i have a K&N what do u think....Should i change my poilet jet too. Please help me:D

[Guy400]

Well it's going to be different for your altitude and for your specific needs but I just got done jetting my quad with an HMF slip-on yesterday. I found that I was too rich on the bottom and wound up only going 2.5 turns on the mixture screw instead of the 3.5 that HMF recommended. Unfortunately, I went with a DynoJet kit so my needle setting is completely different than yours. I'm running a Uni filter with no lid. Hope this helped you!

[Bean]

try a 42 pilot, the instructions for the needle is probably pretty close, and between a 175 - 190 will be your main

[Wheelie]

IMO--HMF's suggestions are too rich. A #40 or #42 will benefit throttle response/low end power. I would suggest a #158 or #160 main jet for a good starting point.

2 1/2 turns sounds good for the mixture screw.

FYI--I run a slip on/K&N w/o lid, no choke---40pj and 155mj 3rd clip on needle at sea level.

[black400ex611]

thanx guys....I ride alot of open spaces here and there ill take some trails...I live in Pa like hours from pitts not in the moutains or anything...hope this helps..tomorrow ill turn my fuel air mix screw to 2 1/2 instead of what hmf calls for...i have a 160 main in it now...and when it is adlen there and i hit the throttle all the way it wants to bog and turn off....:confused:

[Guy400]

Originally posted by black400ex611
and when it is adlen there and i hit the throttle all the way it wants to bog and turn off....:confused: Mine did the exact same thing when I was at the 3.5 turn suggestion. I ran it in to 2.5 turns out and it's great now.

[black400ex611]

Thanx dude i will try this tomorrow and tell u what happens...oh what do u have ur needle set on.....I have the dyno jet kit myself so ur the guy i need to talk to lol...thank man

[Guy400]

If the needle is pointing down I have it on the 3rd notch from the top.

[black400ex611]

thanx i had my needle on the 1st clip and then i turned it 2.5 turns...no more bogging when hit it full throttle while ideling...now when i hold it at full throttle a lil it starts to bog is this normal?

[Guy400]

Are you pinning the throttle while sitting in neutral? If you are that's really bad. Take the thing up the road and pin it and see what it does in 4th or 5th gear. If you're bogging when the throttle's pinned in 4th than you know you're too rich on the main jet and step down one size.

[black400ex611]

well i have to wait to take it out on the road becuz i need a valve steam for my front tire...yea i did like once....better stop that:( ..thanx for the help...