something along these lines has been done before but anywho
imo they are quite average but some will say that all the bits come out of the same factory but then it comes down to which bits are used to save the dealer x amount
i wont go through and tell you which bikes are good and which arnt expect that MSO (
MSO Motocycles - Home tell them you are from miniriders.com.au when you make an enquiry and you will be wowed at service and discount) bikes are pretty much top of the line bikes for around the same price maybe a little more expensive than atomik and bikes of the same quality standard as MSO are probably motovert and pitserter pro (both are somewhere around the $2000 - $3000 not sure)
but im not gonna go through and tell ya which bikes from atomik are good cause then you still have no idea what your looking for
things to check are
engine brand - maybe not so important cause the engines are complete packages on there own your looking for a quality bike not just the engine but lifan own the pit bike scene depending on size
frame - for a pit bike you dont want a twin spar frame look for a chromo trublles cradle frame with removable sub-frame thats for pit bikes the twin spar on the G4 hummer apparently is quite good (dont quote my spelling)
suspension - this is where dealers will clean up as quality rear shocks (that inc. rebound and compression(?) adjustment) are somewhere around the $100 - $200 mark reputable brands include dnm and fastace and front suspension aka. forks (same again that inc. rebound and compression adjustment) will alone set someone back anywhere from $350 - $500 or $600 (dont quote me) so in the suspension alone at minimum and im not sure that you will find decent forks for $350 but thats say $450 just in suspension
other things to look out for are things like
- Alloy Swingarm (i think one with a code 6061 are quality)
- Wiring (you will find out from the threads around the site that some are wired with sections that end up on the exhaust or tire and although you could possibly put a ziptie around them it still adds to the overall finish of the bike)
-all china tires wear out quickly, there are some good brands around but i cant think of them
- handlebars (a quality brand is pro taper they cost anywhere between $80 - $150? really i have no idea
)
- little bits here and there like all cnc alloy bits blah blah everything
- brakes (im not sure what are quality ones and which arnt but i with a cheaper bike they have to of skimped on something to get it at that price or they like their big profit margin)
imo
A quality =
MSO
Pitster Pro
MotoVert
B quality =
dhz
pitpro
pimpit
C quality =
atomik
kdf
this is imo some people reckon atomik are ok some bikes have some good bits some are just to make a profit ive heard a bit of talk about the 'reagn... rain?' i dunno spelling but yeh basically the suspension is the thing suppliers will skimp on and to the 50 or 60kg rider this may not be a problem also depending on type of riding straight line/trail/fmx but overall build quality is also an issue and the little bits here and there do add up like $40 here $30 x 2 there like that could be the difference between wheels and brakes and also the difference between a B and C quality where the little things are payed attention to on the B quality or A quality that ya dont notice or cant notice until you have 2 side by side
all in all if your looking at a bike around 600 - 800 mark it'll most likly not have the best quality products and you can pick up MSOs entry level bike for $700 and they come with the quality basics assured frame, engine and half decent shocks, they stand by their bikes, their customer service is above and beyond that of your regular dealers (everyone wants to make a profit but there's a difference between caring about people and caring about profit) you will find out what i mean if you read around in the threads, and they give discounts to miniriders members, and also i cant see them shutting their doors anytime soon... there's so many more good points for mso they are continually upgrading bikes and their parts so you can easily upgrade with them etc etc
the decision is up to you but i hope i helped and pointed ya in the right direction -----> MSO
but up to you... each to their own
good luck