For a 150 cc engine ...can r thinking use NOS ?/...simply NO, if u are thinking about fast 'n furious showcased nos...those can create upto 300hp power with a press of button..which any common sensed guy knws , is not possible for r15.

it doesn't mean we cannot use it in a 150cc engine...is it a small thing to create a 2-3 hp power increase for a 17 bhp engine...and many guys with so much mods like special cams, ecu, exhaust, etc...hav made an increase more than 21hp in r15 costing a huge bulk amount worth half of bike!!
\So for the topic,
i'm just thinking to use pure oxygen instead of nitrous oxide ...taking in account of producing loww power increase cheaply and safely..

nitrous oxide is used for its o2 carrying capacity (and certain other advantages, will be explained if needed)... eventually it breaks up during combustion to produce o2 to further combust all fuel at once giving spilt sec power..

unlike n2o, o2 is easily available anywhere ...so its refilling is easier and less costlier..

for installing use a small cylinder( mr.butler soda maker's co2 cylinder will do the purpose)...fill it with o2 , u will need a solenoid valve with a switch to inject the o2 when needed....o2 can be supplied to injection manifold, a tube from o2 cylinder put into intake part will do..fit the o2 cylinder at a suitable place....thats it...ur NOS is ready !!

all these combined will cost u around 1000Rs to max....

NOTE: only thing u hav to remember is to use only nos at high rev..ie. when max fuel is injected..'n supply only small amount....veeeeeerrrry small 'n i mean it....u will be surprised wht a small amt can doo!!