[hondateen]

what can i do to my bike to get the most power and speed ??? and whats this talk about the airfilter and cutting the plastic around that?? how is that done <and also what about some cork ??

[crfsonly]

check your other message on the same topic. it's better to just post once on the same question/topic.

basically...a combustion engine requires an air/fuel mixture to ignite and it's this controlled explosion that creates "power" at the crank. generally speaking the more air/fuel mixture you stuff into your cylinder to explode the more "power" you'll create. using a less restrictive air filter allows more air into the carb...this allows you to increase the amount of fuel by re-jetting the carb. more air, more fuel, more power. now that you have more air/fuel being burnt you need to get rid of it quickly to make room for the next round of air/fuel. hence you need to modify your exhuast to allow for an increase flow.

good luck.

ken

[willflyforfood]

couldn't have said it better myself.

[Ride Red150]

Well if you want to go faster get a smaller rear sprocket BUT one of the set backs is you loose power.

[High Flyer]

I have a 04 CRF150 and what i did was if you look at you exhuast you will see the crome tip and then you will see the little circle inside on the crome tips if you look under neeth you crome tip and will see a screw undo it and take the baller out this will make a more louder sounds and add a cuple hp cuz befor i ddi that my both of my friends 150's could beat mine but now i can beat them so it must do something! (just make sure when you wash you bike not to get water in exhuast it will kill your rings.

[Logan#925]

If you want to go faster i would also reccomend stiffer fork springs and a stiffer shock spring which i believe crfsonly sells and I read that a CR85 front end will bolt right onto a CRF150 all you nedd is the (triple clamps,forks,and wheel, and brake line and resivoir) but yeah if you want to go faster without all that defintly get the stiffer fork springs

[dan256]

i have a big gun race pipe, rev box, plug in the air box pulled out, and a 175 kit. it rips now

[odrogaaa]

...check out Powroll's websight. They've got everything you could ever need to make your 150 into a REAL CRF!!!

[Joker7Icp]

Really whats some good simple upgrades... easy to install and not REALLY $$$$ ?

[ev]

Really whats some good simple upgrades... ?

very often a riding class and practice, practice, practice
is the best and longest lasting upgrade you can get

no, I am not making fun of you
but a faster rider will be faster on any bike
if you can corner, you can corner on any bike
if you cann't you could borrow Ericson's bike and still be slow

[Old Dude]

I agree with ev. I tell my son the same thing. If you want to go faster twist the throttle farther. If you can't use it all, don't ask for more. I have built our bike's suspensions so that they can be ridden agressively, safely and therefore more easily with the throttle pinned. Until you can do that, then you don't need any more power/speed. If you've got the throttle twisted to the stop and still want more, by all means go for the mods. If you want more power drop a tooth on the counter shaft sprocket. This will give you more bottom end or pulling power but you will need to quick shift it to get it up to speed. AND your top speed will suffer. It will be quicker out of the corner or off the gate but not as fast on the top end. If you just want some more speed add a tooth to the counter sprocket. Keep in mind that it won't pull as hard. There is an old races saying "Speed costs money; how fast can you afford to go" I say start inexpensive gearing changes, throttle up kit (Yes it does work if adjusted correctly) open the air box (free!) and put in a good free flowing air filter. Opening the exhaust up is a free mod and does help, but, my opinion is, that the mere fact that it sounds louder gives one the impression that one is getting more power than one really is. For more friendly (honest to goodness) power, save your money and get a good pipe. Look on this site and ask around and take your pick. There are many good ones: as to which is best is often a matter of opinion. Building the suspension to handle the bikes full power potential will allow you to ride it more aggressively. (info on suspension set up can be found right here on this forum: check it out)
You're from Florida right? What do you hear the NASCAR guys talking about? (Sorry if I'm stereotyping) Simply how fast their cars will run? NO!!!; they also talk about handling: make it handle and we can drive it faster. The same principle applies to you bike.
So it's really a package deal: suspension and motor mods; some free or inexpensive. Some not so inexpensive. Heck, Christmas is coming; make a list of goodies. Sell excerpts from your sister's diary! Whatever (leagally!) it takes. Be patient and ride often. Stay tuned to this forum. It is full of usefull info and folks that are willing to help.
Good luck

[wholeshot]

Is powroll's 175 bore kit better or worse than bbr's 175 bore kit??

[ncj01]

I agree with ev. I tell my son the same thing. If you want to go faster twist the throttle farther.

Good luck

I watched a whole race this weekend (woods/harescramble). The biggest take-away I noted was that speed of racer had very little relationship to the bike itself. NO ONE uses all the speed/power thier bike offers. It was a 1st and 2nd gear race. Guys on old beat XR200's held together with Duck Tape were out there throwin' a beating to guys on brand new CRF250R's, etc...

I hate to admit this, becuase I'd like to think I'll be faster than my competition due to my new expensive bike, but really it's going to come down to who can ride faster, not so much as the bike itself.

[Old Dude]

You are absolutely right with regard to competition. It's how fast you can ride what you are riding, not how fast what you are riding can go. Thats why I say build a complete package and learn to ride it effectively. Also law enforcement M/C training classes emphasize learning to ride slow to go faster. The theory being control and knowledge of your bikes capabilities with a focus on clutch/throttle control technique and eye placement (where to look). (if you look down that's where you'll go) Riding a KZ1000 with street tires in the dirt can teach you a lot. It can also make you see God.

[ncj01]

You are absolutely right with regard to competition. It's how fast you can ride what you are riding, not how fast what you are riding can go.

Riding a KZ1000 with street tires in the dirt can teach you a lot.

It can also make you see God.

Classic!! I have a feeling my 450R may give me a few glimpses eventaully when I get up the nerve to take it to the edge.

I"m curious about a KZ1000? What is that? I ask becuase my dad used to have (a long time ago) a 2-stroke street bike, which I thought was a KZ750...I'm pretty sure it was a Kawasaki, and I"m pretty sure it was a 750 (3 cyclinder), and it definately was a 2 stroke. I need to ask him. But anyway, I remember (i was a mere little chap) talking about it being the scariest street bike he had ever rode, and he was a good rider, later owning a Vmax, etc...