Quote:
Originally Posted by F9zSlavik
What do you mean by 2-1 exhaust? Sorry, <--newb
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Factory exhaust for pre-gen 250 is 2-2 design (2-cylinders out 2-mufflers). Like right-most photo below.
https://faq.ninja250.org/wiki/Will_a...it_my_88-07%3F
Exhaust in 2-2 configuration favours high-end RPM power and gives pre-gen its dead mid-range/screaming top-end characteristic. Fitting 2-1 exhaust (left 2 photos), yields more usable mid-range torque and less top-end power. Certainly more friendly on street-bike and you won't need to downshift 2 or 3-gears to pass on carriageway. Not easy to find, but it's not difficult to modify newgen to fit, or convert pregen 2-2 exhaust by fitting merge and rear section of newgen 2-1 exhaust onto 2-2 header pipes.
Some Ali el-cheapo exhausts that comes in separate sections can also be made to fit by pivoting header sections to fit between head and collector. They claim it fits pregen 250, newgen 250 as well as 300. I can at least verify that it fits pregen and newgen 250 bikes (don't have 300 on-hand to test fit).