CRF's Only Forums

hi.
1. i want to buy a crf 50 or 70 but i dont know their sizes. i own honda z50 r and can any body tell me is crf 70 bigger than z 50 r ???

2. is it possible to buy crf 50 and put a 150 cc engine in it ???

here are the specs for the 2007 models, although I don't believe that they have changed in a while.

________CRF 70________CRF50
Rake--27.03 degrees 25.0 degrees
Trail--61.5mm (2.4 inches) 32.0mm (1.3 inches)
Wheelbase--42.0 inches 36.0 inches
Seat Height--26.1 inches--21.6 inches
Ground Clearance--7.0 inches 5.8 inches
Dry Weight--128.0 pounds--104.0 pounds
Fuel Capacity--1.5 gallons, including 0.3-gallon reserve 0.8 gallons, including 0.2-gallon reserve

As far as the 150 motor, I am going to say probably not. The 50 and 70 motors are layed forward and the 150 is more upright. You might check out an 80 if you want a clutch.
Joe

are you trying to say that 80 cc will fit ???

i found on a ebay great engine its a 138 cc lifan and it says that it fits crf 50 . is that true and will i need a new carbuerator for it ??

and does anybody know is lifan a good engine or not ?? i heard that it is made under a honda supervision.

( sorry for my english )

NO, I am not suggesting that you attempt to put another engine in a 70 frame. My question is why do that? Just get the appropriate bike size for you and hone your skills. Move up as you become good enough. Fooling around with changing engines is alot of work, expensive, and the payoff is generally not worth it.
Joe

Zek,
Are looking for pitbike racer? where do you live at?

i live in germany =)) ( dont speak to me in german . i speak russian )

i know how to ride a 50 very well i own z50r for over a year and i got skills =)) so dont worry about that.

i will probably buy crf50 because i dont want anything bigger than z50r and crf 70 is bigger than z50r.

so does 138 cc lifan fits or not and what problems may happen with that.

and i want MANUAL clutch.

what u mean by pit bike racer ???

Thats ok my German sucks anyways LOL took 2 years of it and only thing I remember are the cuss words LOL. Well Guess it would help if I knew how old you are to. Pitbike racing is basiclly take a 50 and trick it out and adults race them . I have a buddy with a 110 in his 50. I have one with a 107. needs some work though before I can even thing about racing it. From what I know about Lifans' they are pretty decent but I don't really know enough about them to be honest so I'm not gonna BS ya.
I know they make a kit to convert a 50 to a clutch. someone was talking about it on here a few days back i believe.
May want to search for that.

im turning 18 in 1 month. im not going to race with it. I dont even know where good tracks are. i just want something light, powerfull and good looking. near my house there is a kind of a country road and there ill be riding it mostly =)) and also itll be my taxi if i want to go out and drink some beer =))

I know they make a kit to convert a 50 to a clutch

noo 50 is not enough i weight almost 220 pounds

how my age will help u ??

Zek, get a crf230f and be done with it.
Joe

omg bro you're as big as me. I felt so unstable on my kids suzuki rm 85. Get a bigger bike bro don't be afraid of the size. You will safer on a bike ment for your weight.

I know they make a kit to convert a 50 to a clutch

thats the problem
1. it wont fit in my audi a4
2. i like small bikes ( pitbikes,pocketbikes)
3. i dont have that much money to buy 230 its waay too expensive only shipping will be about 400 $

and even if i decide to buy 230 one day first ill get a driving licence for a motorcycle which is about 800 euro so crf 50 is my choise

omg bro you're as big as me. I felt so unstable on my kids suzuki rm 85. Get a bigger bike bro don't be afraid of the size. You will safer on a bike ment for your weight.

so many people is telling me that......... im strating to think about crf70 .......

ZeK wrote:

omg bro you're as big as me. I felt so unstable on my kids suzuki rm 85. Get a bigger bike bro don't be afraid of the size. You will safer on a bike ment for your weight.

so many people is telling me that......... im strating to think about crf70 .......

ZeK the crf80f is only about $400 US more than the 70 and will fit you a lot better.
Joe

thanks for help guys . im buying crf50f.
if anybody got a crf/xr 50r without an engine that will be great http://crfsonly.com/forum/viewtopic.php?p=123664

I was rolling on the ground reading this. For some reason it was hilarious. Not the grammar or anything but the direction that the story was heading. Everyone is all serious with advice about racing and what not and he says he just wants something go out and get drunk on and ride home. The images in my head about the story were so funny.