just about to take bike test on a 125 bike how do i find out how to restict a 600 bandit to 35 bhp so i rideit

The limit is 33BHP and it is achieved by fitting an aftermarket set of inlet manifold rubbers that have air flow restictors in them to reduce the fuel flow, i.e. the rubber maifilds that your carbs are connected to the cylinder head with, beware some insurance companies will only accept factory restricted bikes and not self resticted bikes.

To restrict your bike to 33 bhp usually means restricting the flow of air either into or out of the engine ( intake or exhaust ) which can be done your self without to much trouble , however you will need the paperwork to back up the fact it has been done meaning you will have to take it to a suitably equipped workshop for them to test that it has been restricted properly your riding school should be able to supply you with details of the nearest place , also a bit of advice after it's been restricted don't derestrict it as if anything happens to you or the bike involving police or your insurance co the first thing they will check is that it is restricted and your insurance will be invalid if they find it isn't also the police may charge you with riding without a licence and no insurance ( not telling you how i know )

Practically you can get away with not restricting your bike as the only way the police can check if it is restricted or not is by putting it on a rolling road (which they will never do). but it is a bit of a give away when you get caught doing over a ton.

But personally I would unwind the adjustment on the throttle a little bit and save your money.

Disclaimer: the information provided is for education purposes only and is not intended for any illegal activity.

most dealers fit restricted bits on the bike it normally have a cert to tell you that the bike is 33bhp

Go to a garage and ask them to order and install a restrictor kit for you. Easy peasy.

take a plug lead off, or put a restrictor int the exhaust manifold, easy pesy

dude take some wet cement, put it in the spark plug hole and let it sit overnight

Why in the world would you want to do this?