How to make my 250r faster????

[jamesca]

Hey guys and girls. I have an 85 250r that I just bought a month ago. As like most of you here, I'm addicted to speed. So help me out, and let a 3 wheeled beginner know how to make his bike faster. I've already got an aftermarket exhaust. But what else can I do???? Help a fellow three wheeler out!!!!!!!

[86250RZ]

Boyseen Radvalve w/ carbon fiber reeds & Dial-A-jet. You said you already have aftermrket pipe but what kind, I had a DG on my 85 then went to a FMF Fatty and could not believe the difference :shock:

[jamesca]

My bike almost looks identical to your picture. I'm not sure what brand my exhaust is, it was on there when I bought it. All i know is that the whole exhaust system is chrome. Not sure what brand it is. Could be a no name crappy system for all I know. How much would it cost to do these mods?

[86250RZ]

Should have markings on pipe somewhere, look on fat part of pipe. Radvalve W/reeds $119.00 Dial-A-Jet $69.95 both worth every penny. www.rockymountainatv.com look them up and give them a call they normaly have the best prices. Only other thing you could do for major power would be a port and polish job, depending on who you call and what type of port job, you will be looking at $300.00 to $500.00 but well worth it.

[86250RZ]

Almost forgot buy you a K&N filter also $35.00 not a big diff. by itself but a must if you plan on adding a few mods to trike.
send pic of carb if you can if you have stock 85 carb chunk it in the trash and upgrade to 86 carb you will be glad you did. Hope some of this helps.

[jamesca]

cool man, thanx for the info. I checked out the website and found those parts that you suggested. Are they pretty easy to install? Also, don't really understand what they do. I know they increase power but how? Oh yeah, the guy I bought my bike from said they engine was just rebuilt and that it was ported.

[86250RZ]

Dial-A-Jet & Radvave give you a crisper throttle response, that helps on low end and adds just alittle on top. The Dial-A-Jet is like a simulated fuel injection system you gain power thru out by it shooting emulsified fuel right behined the carbs slide, the fuel is lighter in this state so it does a better job of filling in the lean spots in power curve. I think both mods are very easy to install.

[200x Basket]

1. pipe and silencer
2. rad valve with carbon fiber reeds
3. 38mm keihin airstryker carb
4. 89 cr250 head gasket
5. fresh rings or fresh topend
6. port and polish
7. cool head
8. 14 tooth front sprocket
9. k&n or uni filter
10. drill some holes in you air box lid or remove it
11. jet it correctly and do not use a dial a jet

[250rmanfmf]

you can also get these things

Nacs CDI
or
MSD Iginition system

shave the head, run the bike on trick fuel
boost bottle

there are so many ways to trick it out, it just takes $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ $$$$$$$$$$$$$$$$$$

[jamesca]

hey thanx for all the info. Heres a picture of my bike. I'll post more if I can.

[NOS_350X]

well an easy solution is put a crf450 engine in it :D i saw one at a local shop looked good

[ATC crazy]

Nice R jamesca...

Definately get a UNI or K&N air-filter...But if you get the K&N, Get the Outerwears cover for it too. If you want more power, try a 310 kit.

[Andrew]

im not one to like 2 strokes,but that is a VERY nice 250R

[CHAINSAW]

my suggestion..


Leave it alone. Once you start modding it, you will have as much wrench time as ride time. Just my 2 cents. The more mods, the longer down times and bigger paychecks it takes.