Wondering what parts are interchangeable between models
 

Have a klr250 2000 model and getting any form of parts unless genuine is very hard even genuine can be difficult at times.
I'm wondering what parts are interchangeable with other models that have more of an after market following like the klx kx kdx klr650 or others models
Plastics is one thing I would be really interested in as front fender gets smashed up regularly and is again getting closer to more tape and cable ties than actual fender.
Rear brake pedal is another been smashed on rocks and beaten straight again several times now and nearly time to replace that
Also wouldn't mind lightening the bike abit with things like after market exhaust kick starter
Larger plastic fuel tank would also be good too if possible