hot cam stage 1

[joe346CBMX]

has anyone here run a stage 1 hot cam on a 250F before?

was it a worth while mod. I know many use the stage 2 but
I actually am leaning toward a stage 1 for bottom end/torque on my crf250r to get obstacle right out of corners easier. I'd appreciate any feedback you can give either way.

thanks Joe

[nathan]

hey i have the stage 1 hotcam,s in mine and if it is up to me its woth it...made a world of defrens over mine than stock were it ust to lug it dosent im a bigger guy and it helptd me i also had a hot rod crank and rode put in wiht a wisco high compression piston and it runs great hope that helpted

[ktm_cody_199]

Nathan doesnt count because hes got a crf240,if the stage 1 is for torque and the stage 2 is for high end then I would get the highend.The little thumpers wont make good torque anyway so just shift and slip the clutch some out of the turn and rev the piss out of it,youl make it.Try turning faster,im not really for modding motors unless its really small because you loose reliability and technique.Learn how to turn faster and exit faster,do what you can with what you have Not sure what brand cam your buying,but I f you really want more power get this:[Only registered and activated users can see links. ]

Not sure if your on a budget but this kit includes what you need to pull more power and torque out of your 250f for a reasonable price.

[Woody_393]

I can't speak for the 250F, but when I put a stage 1 in my 450, it was awesome. Hands down better than a pipe, and really added to the low end.

[ktm_cody_199]

woody.........Why did you want more torque in a 450?must do some hella wheelies

[Woody_393]

It sure did.

It wasn't that I wanted more torque in general, I wanted more torque in the low end, and that I got. It was awesome.

[joe346CBMX]

thanks for the info guys.

I agree corner speed can always be improved and I am working on that. I'm adjusting my riding style to carry more momentum. I am used to having 450 torque. anyway been working on the outside lines....

Still I dont want to go back to a big bike right now. I love the handling and cornering ability of this bike and it'sso light....yet at 190 lb I could use a little more low end in some situations. I have a Dr. D. pipe and added 1 tooth to the rear sprocket. both helped. The bike will wheelie over obstacles and all no problem.

I think I'll probably give the hot cam a try. I can always go back to stock and sell the thing on e-bay if I dont like it.

[Woody_393]

Exactly. You aren't out much, and the swap out is easy.

I doubt you'll be disappointed. Unless you miss the top end (you will lose some top end power).

[ktm_cody_199]

Put some stiffer valve springs in while your in there.Just me but If I was ganna try and find more torque in a small motor,id get a HC piston aswell as a cam.How fresh is the motor?

[joe346CBMX]

Good point. I had talked to an engine builder who said the same thing a while back. I do plan to get the hi comp piston on rebuild.

The valves are in spec and it runs and starts good, 1-2 kicks usually. It's still pretty fresh, especially for a 2007. The bike actually makes really good power for A 250F. I just been looking at ways to add a bit more without sacrificing reliability and my understanding is that the hot cams, cam can do that. Like I said I'm on the bigger end of the spectrum for 250F riders. I probably belong back on a 450 but love riding this little thing, lol.

Since I missed most of this summer's seat time due to injury/ neck surgery and bought this 07 in September of 07 when 08's were coming out I have just over 19 hrs. on it. I use an hr. meter and dr. d. mounting bracket to track it.

I just got an offer from Hot Cams on sponsorhouse.com so I will most likely accept that and give it a go. They indicate you can use stock springs but when I get a new piston I'll do the entire valve train too.

thanks, joe

[Woody_393]

The stage 1, from my understanding will actually help your valves last longer due to having less radical cam lobes.

That's great about the sponsorship!

[ktm_cody_199]

If the motors in good shape then it should be a really good upgrade from stock,thats great that you are geting a deal too.There is little things you can do to get better lowend performance,for example:Smaller intake port will give you more lowend,and a shorter header and silencer will give you more top end.Thus,if you really want a torque motor,slap a small(verry small im talkin millimeters in width) spacer in the intake tract of the head and get a longer header like off of a crf-x.Get a spacer big enough to fit tight into the intake tract and get it thick enough to make a diff in low end power.If you do this you will lose top end but gain tons of snap and torque.This is the kind of mods the factories do for supercross,they do the opposite for outdoors.No BS here mainjet

[pjg351]

Originally Posted by ktm_cody_199

If the motors in good shape then it should be a really good upgrade from stock,thats great that you are geting a deal too.There is little things you can do to get better lowend performance,for example:Smaller intake port will give you more lowend,and a shorter header and silencer will give you more top end.Thus,if you really want a torque motor,slap a small(verry small im talkin millimeters in width) spacer in the intake tract of the head and get a longer header like off of a crf-x.Get a spacer big enough to fit tight into the intake tract and get it thick enough to make a diff in low end power.If you do this you will lose top end but gain tons of snap and torque.This is the kind of mods the factories do for supercross,they do the opposite for outdoors.No BS here mainjet

Where's the Proof ?

[ktm_cody_199]

Proof of what,if it works?It just does ask a engine tuner or mechanic.

[pjg351]

Originally Posted by ktm_cody_199

Proof of what,if it works?It just does ask a engine tuner or mechanic.

I thought you might like to enlighten us with a spiel on intake reversion.

[ktm_cody_199]

This is what the guy that does all the work on my sx-f said."Larger intake ports feed more fuel/air to the combustion chamber for better top end performance".But will give you a slight lag on the bottom because it is too much and will take a second too bring the rpm's up.Smaller intake ports do the opposite giving you better fuel/air for quick acceleration and snap bringing the RPM's up faster but weaker up top.Thats what a really good mechanic told me and he knows what hes talking about,he is rebuilding my topend now.

[joe346CBMX]

dyno chart for stage 1 Hot Cam. looks pretty good down low and mid. not much lost on top.

http://www.hotcamsinc.com/documents/...0173046898.jpg

[ktm_cody_199]

sweet would be a great mod for a woods rider,or tight tracks.

[Mainjet2001]

Originally Posted by ktm_cody_199

No BS here mainjet

[Dano426]

Originally Posted by joe346CBMX

dyno chart for stage 1 Hot Cam. looks pretty good down low and mid. not much lost on top.

http://www.hotcamsinc.com/documents/...0173046898.jpg

Did you ever get the cams? Just wondering what you think of them?

Thanks
Dan