HC head initial thoughts/questions

[forgiven]

Overall I think it will be a really nice bolt on mod.

With my big buttocks on it it seems like there is a slight hesitation when going from idle to wide open. There is an initial surge when touching the throttle but then a very slight hesitation then pulls hard all the way.

The guy who does a lot of work on my bikes says it feels really good to him, but if I was going to tinker with it where would I start. Now with my kid who is about 115 lbs lighter than me...there may be nothing. Either way he is going to see a decent difference.

I have it jetted pretty dang close. It is not tan but it is a lighter brown. Mocha or taupe would be my description. It is the stock MJ which I think is a 107. Sounds almost like a pilot or clip issue...more inclined toward pilot but would be unsure up or down.

Thoughts?

Thanks

[ecmini1]

Need to see how it reacts with your child on it first. The eng. will have less weight to pull of the line so the slight bog will most likely go away.

[sldhd700]

How much compression are you running now?


Shayden Housley #39

[forgiven]

Did not verify it but I am pretty close to 175. Just did the KOSO head.

[kenjolly]

I put a 175 psi head on our drx2 90 wc but i havent done the carb mod yet. when ran 100 octane fuel with 100 main jet 42 pilot. it was muddy but it does come out of the corners better and a good hole shot. i will give another update when we have a dry track.

what kind of set up are you guy's running?

[Nichols Atvs]

im kind of in the same boat

Is this for a 50 or a 70 air or water. i also just got a hc head to try but im running the mikuni 16 on a 50 air . im waiting on the oko 21 carb and intake. im wondering if i should try the head with the 16 first then see if i need the 21 what do you all think. my boy weights in at 43 lbs. i was also told to run two spark plug washers to move the plug out a little from hitting the piston running 8hs plug . Up octane to about 102 -103 . imput requested as well.

[kenjolly]

Has anyone sent the cylinder and head off to be ported and worked, if so who and how much.

[forgiven]

I am using the Drx2 90 with the 24mm OKO

I have not done the carb mod and am hesitant to do so until more information is out there.

[seth65]

Originally posted by kenjolly
Has anyone sent the cylinder and head off to be ported and worked, if so who and how much.

I tried to reach chris grissom but wasnt available tell thur.

[kenjolly]

not that i know of, black white blue pink red and yellow