Saturday, July 13, 2013

What is 50cc, 100cc,etc. stuff in motocross bikes?

best kids motocross bike on Kids Motorcycle Racing Guide.
best kids motocross bike image



azn


.I'm thinking about buying a motocross bike, but I'm a noob, lol...

Which cc is most popular?
so whats a good cc for 14 year old?



Answer
lol, i can see you don't know much about motorbikes, so i'll give you the whole run down.

There are 2 strokes and 4 strokes.

A 2 stroke is an engine where you have to mix oil into the petrol(common ratio is 40:1), then put it in the fuel tank, they are generally a bit faster than 4 strokes with the same size engine but are less reliable. They are often refered to as "2T"
Here is a picture of a CR250 (note the large bubble near the front of the engine, all 2 strokes have it)
http://www.motorcycledaily.com/090804cr250top.jpg

A 4 stroke you can put straight petrol into the fuel tank, they have more torque than a 2 stroke but a little slower. Often much more reliable than a 2 stroke though.They are often refered to as a "F" or the letter F behing a number(such as 250F, which would mean, 250cc 4 stroke). Here is a picture of a CRF250
(note how there is no bubble, and it is a CRF instead of CR, the F means it's a 4 stroke).
http://www.powersportsnetwork.com/powersportsdlr/images/NewVehicles/2005_1_CRF250R.jpg

ENGINE SIZES:

The smallest engine size for a motocross starts a 50cc - meaning 50 square centimetres of displacement.

50cc - 2 stroke and 4 stroke 50cc have very little differnce to each other, genrally designed for kids 3 - 6 years old.

65cc - Only in 2 strokes, more power than a 50cc. a mini motocross race bike designed for 6 - 11 year olds.

70/80/90/110/125 cc's - these are 4 stroke, and generally powerless, they aren't for racing.
Bought for kids by parents who want to save a heap of money (and fun). Do not buy this for yourself.

85cc - only in 2 stroke, older models before the year 2000 ar somtimes 80cc, much quicker than any of the bikes above, a semi junior racing bike, surpizingly quick, equivilent to honda's CRF150R.
expensive, but worth it. Comes with the choice of big or normal wheel size.

100cc/105cc - Just a tuned 85cc 2T, same size frame, just a bit more power. Hard to find.
slightly more expensive than 85cc.

150cc - exclusivly to Honda, it's the CRF150R, a four stroke that is equivilent to a 85cc.
more expensive to buy, run and repair.
has the extra edge in racing, also comes with normal or big wheel options.

125cc - 2 stroke racing motocross, full size, very common, very fast, need some expirience before riding, can go up to 80mph/130kph.
quite expensive - in the thousands.

144cc - 2 stroke a tuned 125cc, slighly faster and heavier. very rare.

250cc - the most common motocross bike, comes in 2 stroke and 4 stroke. This makes a huge diffence whether it is a 2 or 4 stroke, a 250 2t will utterly fly, a 250F is still very fast and is comparable to a 125cc 2T.

400cc+ for the expirienced rider only, the odd 2 stroke will pop up such as the cr500 which is insanly powerful, but mostly just 450cc 4 strokes, very expensive, quite common, mega powerful, do not underestimate.

The brands

Honda - Japanese - supposed to be the best, i tend to agree
Yamaha - Japanese - also very good
KTM - European - Not very reliable, probably the fastest
Suzuki - Japanese - Average all round
Kawasaki - Japanese - Average all round

My recomendation

If you are short and never ridden before, maybe an YZ85 or CRF150R big wheel

if you are short and have ridden before, maybe a CR125 or YZ125

if you are tall and haven't ridden, maybe a
ttr230/ttr250 - yamaha
CRF230 - honda

tall and have ridden before, maybe a CRF250R a CR125 a yz125, basicly any 125cc 2t or 250f


have fun bargain hunting!

ps. i spent ages typing this up, chose as best answer please.

How do I get into motocross without spending a lots of money?







I already have an awesome bike set up for racing and i'm a good rider, but I don't know what to do or how to get into the sport. I don't want to spend a great deal of money either...please help.


Answer
ok here is the deal. motocross is one of the most expensive hobbies you can get into and if money is going to be a major issue for you take it from race to race and dont plan on racing a whole lot
these are the fees at my track

practice- practice days consist of a 30 dollor entrance fee and the cost of travel (not bad right)

Race day-
20 per person for entrance for the day
20 per class you enter

now assuming your going alone and riding one class
40 right there

then in order to stay competative your bike needs to be well tunes by you or a dealer so you have to factor that cost in(i dont know what bike u have so i cant give u a price on that) that includes:
Oil, Chain lube, coolent, ect.

i dont care how good of a rider you are u need to have spare
handle bars
shifters
levers (clutch and break)
tires
tubes


if u dont have gear then you have to pay for that
helmet-100
chest protector- 80
boots-400 (dont skimp on price on boots)
gloves- 30
knee guards-100
elbow guards- 50
pants and jerseys- 100 bucks (if u get them cheep)

and you have to understand these bikes are under emense pressure all the time in four years of racing i was lucky and only had 2 engines blow on me but i know kids who raced for one year and had his engine blow 3 times (not his fault good rider) so you have to be ready to pay for engine work. rims get bent, spokes break, clutch perches snap and plastics get ripped off and if u want to race next weekend your paying for that befor practice on wensday.

like i say in all my posts im not trying to keep u from racing im just telling u the truth that it consumes ur life finacially and personally if u want to be a real racer and not just some one throwing ur bike on the track and praying that it doesnt blow you need to spend money.

thinking about it i didnt really tell u how to save cash. well you can travel with a friend, only go to practices and races twice a month. if the bike is busted dont race till u can fix it over time. get a sponsor.




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