every motor has a powereband. i got a 03 85sx, and a 04 105sx and they got a powerband from hell, made for some serious damage. make sure your gas to oil ratio is rite. also dont use cheap 2-cycle, invest $12 on a pint, i promise you, that beast got a badass powerband extream3d87@Yahoo.com
If your exhaust valve happens to be stuck open or shut this will drastically make you lose power band, if you use low grade oils they cause your power valve to get sticky, then you should dissassemble and clean it
40:1
.7 L
63mph
Yes the frames are exact and the 200/125 share the botom end/cases.
110mph
The year matters. stick with an 03 crank.
for 2009 KTM 125SX $5998 US
MSRP of the 09 KTM 125 SX is $5998 USD.
Ktm 125sx
I personally use 32:1 of amsoil and regular unleaded gas for my ktm 125 sx 2003.
KTM recommends Motorex Top Speed 4T15W50 for the 125SX.
A Ktm 125sx is not a good trail bike because sx means super cross so it is a good racing bike it is good for jumps and racing