ive heard of a hole drilled in the airbox to adjust the tickover easily. Anyone know about this and where to drill it. Cheers, Keith.
You shouldn't be adjusting the throttle stop, if it's not idling it needs the TPS resetting and / or the air bleeds set correctly. You should read this.
Only USA models need drilling. Euro models have rubber bungs that can be removed to access the screws. It is a complicated procedure to alter idle and AFR at idle but it can be done at home with some practice.
The tps and everything else have all been set. I've been told by tech the stop needs adjusting but is a pita to get to without drilling. Its an facelift 999 bip.
Throttle stop shouldn't be touched. It's preset to the angle the TPS is zero'd to. Move it and the return signals from the throttle won't correlate with what the throttle is actually doing. Say the TPS reset is 2.7 degrees. This is the angle the throttle is set to and sealed by the factory. You move the throttle stop to say 6 degrees, the software reset will still be 2.7 so the ECU will fuel to that even though the throttle will open wider.
Ok. So how do I increase the tickover please? Its at 8-900 rpm and although it doesnt stall it doesnt feel good.
Tickover is controlled using the air bleed screws and the CO trim. Balance/set the tickover using the airscrews. Raise the tickover by turning the screws out or visa versa. Using the CO trim, bring the CO readings back to spec. If you have to use a lot of trim, you may need to tweak the screws again.
You will find the bungs on the left side of the airbox (when sat on bike). There are three in total but you will only need to remove the two outer round bungs, they are tight usually and a can of WD40 will help. Once off peer inside with a small torch and you will see the screws. Each screw allows more air to pass the throttle plate as you turn it out, turn it out and the throttle should rise but at the expense of your afr settings, winding out will weaken the mixture. Take note of where you started in case you need to return them, turn both screws by small and equal amounts. You should really set injector trim too btw.
